Installation difficulties #1923

jvines · 2019-09-07T05:51:00Z

Hi

I'm trying to install nokogiri on OS X Mojave 10.14.5. I have XCode version 10.3

If I run gem install nokogiri I get the following output:

Building native extensions. This could take a while...
ERROR:  Error installing nokogiri:
	ERROR: Failed to build gem native extension.

    current directory: /usr/local/lib/ruby/gems/2.6.0/gems/nokogiri-1.10.4/ext/nokogiri
/usr/local/opt/ruby/bin/ruby -I /usr/local/lib/ruby/site_ruby/2.6.0 -r ./siteconf20190907-50296-a1x7nn.rb extconf.rb
checking if the C compiler accepts -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2... yes
checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
Building nokogiri using packaged libraries.
Using mini_portile version 2.4.0
checking for iconv.h... yes
checking for gzdopen() in -lz... no
zlib is missing; necessary for building libxml2
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
	--with-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/usr/local/Cellar/ruby/2.6.4_2/bin/$(RUBY_BASE_NAME)
	--help
	--clean
	--use-system-libraries
	--enable-static
	--disable-static
	--with-zlib-dir
	--without-zlib-dir
	--with-zlib-include
	--without-zlib-include=${zlib-dir}/include
	--with-zlib-lib
	--without-zlib-lib=${zlib-dir}/lib
	--enable-cross-build
	--disable-cross-build

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /usr/local/lib/ruby/gems/2.6.0/extensions/x86_64-darwin-18/2.6.0/nokogiri-1.10.4/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /usr/local/lib/ruby/gems/2.6.0/gems/nokogiri-1.10.4 for inspection.
Results logged to /usr/local/lib/ruby/gems/2.6.0/extensions/x86_64-darwin-18/2.6.0/nokogiri-1.10.4/gem_make.out

If I run gem install nokogiri -- --use-system-libraries I get the following output:

Building native extensions with: '--use-system-libraries'
This could take a while...
ERROR:  Error installing nokogiri:
	ERROR: Failed to build gem native extension.

    current directory: /usr/local/lib/ruby/gems/2.6.0/gems/nokogiri-1.10.4/ext/nokogiri
/usr/local/opt/ruby/bin/ruby -I /usr/local/lib/ruby/site_ruby/2.6.0 -r ./siteconf20190907-49671-194g08j.rb extconf.rb --use-system-libraries
checking if the C compiler accepts -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2... yes
checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
Building nokogiri using system libraries.
checking for xmlParseDoc() in libxml/parser.h... no
checking for xmlParseDoc() in -lxml2... no
checking for xmlParseDoc() in -llibxml2... no
-----
libxml2 is missing.  Please locate mkmf.log to investigate how it is failing.
-----
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
	--with-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/usr/local/Cellar/ruby/2.6.4_2/bin/$(RUBY_BASE_NAME)
	--help
	--clean
	--use-system-libraries
	--with-zlib-dir
	--without-zlib-dir
	--with-zlib-include
	--without-zlib-include=${zlib-dir}/include
	--with-zlib-lib
	--without-zlib-lib=${zlib-dir}/lib
	--with-xml2-dir
	--without-xml2-dir
	--with-xml2-include
	--without-xml2-include=${xml2-dir}/include
	--with-xml2-lib
	--without-xml2-lib=${xml2-dir}/lib
	--with-libxml-2.0-config
	--without-libxml-2.0-config
	--with-pkg-config
	--without-pkg-config
	--with-xslt-dir
	--without-xslt-dir
	--with-xslt-include
	--without-xslt-include=${xslt-dir}/include
	--with-xslt-lib
	--without-xslt-lib=${xslt-dir}/lib
	--with-libxslt-config
	--without-libxslt-config
	--with-exslt-dir
	--without-exslt-dir
	--with-exslt-include
	--without-exslt-include=${exslt-dir}/include
	--with-exslt-lib
	--without-exslt-lib=${exslt-dir}/lib
	--with-libexslt-config
	--without-libexslt-config
	--with-xml2lib
	--without-xml2lib
	--with-libxml2lib
	--without-libxml2lib

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /usr/local/lib/ruby/gems/2.6.0/extensions/x86_64-darwin-18/2.6.0/nokogiri-1.10.4/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /usr/local/lib/ruby/gems/2.6.0/gems/nokogiri-1.10.4 for inspection.
Results logged to /usr/local/lib/ruby/gems/2.6.0/extensions/x86_64-darwin-18/2.6.0/nokogiri-1.10.4/gem_make.out

The outputs of mkmf.log are, respectively:

"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I.  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2 conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib     -lruby.2.6    "
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */

"x86_64-apple-darwin13.4.0-clang -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I.  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2   -Werror -c conftest.c"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main() {return 0;}
/* end */

"x86_64-apple-darwin13.4.0-clang -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I.  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2 -Wno-error=unused-command-line-argument-hard-error-in-future   -Werror -c conftest.c"
error: unknown warning option '-Werror=unused-command-line-argument-hard-error-in-future'; did you mean '-Werror=unused-command-line-argument'? [-Werror,-Wunknown-warning-option]
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main() {return 0;}
/* end */

have_header: checking for iconv.h... -------------------- yes

"clang -E -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I.  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2  conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <iconv.h>
/* end */

--------------------

have_library: checking for gzdopen() in -lz... -------------------- no

"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I.  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2 conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib     -lruby.2.6 -lz    "
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd
Undefined symbols for architecture x86_64:
  "___stack_chk_fail", referenced from:
      _main in conftest-c71f4f.o
      _t in conftest-c71f4f.o
  "___stack_chk_guard", referenced from:
      _main in conftest-c71f4f.o
      _t in conftest-c71f4f.o
  "_printf", referenced from:
      _main in conftest-c71f4f.o
ld: symbol(s) not found for architecture x86_64
clang-4.0: error: linker command failed with exit code 1 (use -v to see invocation)
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: #include <zlib.h>
 4: 
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     int (* volatile tp)(void)=(int (*)(void))&t;
11:     printf("%d", (*tp)());
12:   }
13: 
14:   return 0;
15: }
16: int t(void) { void ((*volatile p)()); p = (void ((*)()))gzdopen; return !p; }
/* end */

"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I.  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2 conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib     -lruby.2.6 -lz    "
conftest.c:16:13: error: conflicting types for 'gzdopen'
extern void gzdopen();
            ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/include/zlib.h:1351:24: note: previous declaration is here
ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
                       ^
conftest.c:17:23: error: too few arguments to function call, expected 2, have 0
int t(void) { gzdopen(); return 0; }
              ~~~~~~~ ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/include/zlib.h:1351:1: note: 'gzdopen' declared here
ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/include/zconf.h:377:19: note: expanded from macro 'ZEXTERN'
#  define ZEXTERN extern
                  ^
2 errors generated.
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: #include <zlib.h>
 4: 
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     int (* volatile tp)(void)=(int (*)(void))&t;
11:     printf("%d", (*tp)());
12:   }
13: 
14:   return 0;
15: }
16: extern void gzdopen();
17: int t(void) { gzdopen(); return 0; }
/* end */

--------------------

"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I.  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2 conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib     -lruby.2.6    "
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */

"x86_64-apple-darwin13.4.0-clang -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I.  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2   -Werror -c conftest.c"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main() {return 0;}
/* end */

"x86_64-apple-darwin13.4.0-clang -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I.  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2 -Wno-error=unused-command-line-argument-hard-error-in-future   -Werror -c conftest.c"
error: unknown warning option '-Werror=unused-command-line-argument-hard-error-in-future'; did you mean '-Werror=unused-command-line-argument'? [-Werror,-Wunknown-warning-option]
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main() {return 0;}
/* end */

"pkg-config --exists libxml-2.0"
| pkg-config --libs libxml-2.0
=> "-L/usr/local/Cellar/libxml2/2.9.9_2/lib -lxml2\n"
"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I.  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2 conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib     -lruby.2.6 -L/usr/local/Cellar/libxml2/2.9.9_2/lib -lxml2   "
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */

| pkg-config --cflags-only-I libxml-2.0
=> "-I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2\n"
| pkg-config --cflags-only-other libxml-2.0
=> "\n"
| pkg-config --libs-only-l libxml-2.0
=> "-lxml2\n"
package configuration for libxml-2.0
cflags: 
ldflags: -L/usr/local/Cellar/libxml2/2.9.9_2/lib
libs: -lxml2

"pkg-config --exists libxslt"
| pkg-config --libs libxslt
=> "-L/usr/local/Cellar/libxml2/2.9.9_2/lib -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2\n"
"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I. -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2  conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib     -lxml2 -lruby.2.6 -L/usr/local/Cellar/libxml2/2.9.9_2/lib -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2   "
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libxslt.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libxslt.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libpthread.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libpthread.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libicucore.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libicucore.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libm.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libm.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */

| pkg-config --cflags-only-I libxslt
=> "-I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2\n"
| pkg-config --cflags-only-other libxslt
=> "\n"
| pkg-config --libs-only-l libxslt
=> "-lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2\n"
package configuration for libxslt
cflags: 
ldflags: -L/usr/local/Cellar/libxml2/2.9.9_2/lib
libs: -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2

"pkg-config --exists libexslt"
| pkg-config --libs libexslt
=> "-L/usr/local/Cellar/libxml2/2.9.9_2/lib -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2\n"
"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I. -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2   conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib     -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lruby.2.6 -L/usr/local/Cellar/libxml2/2.9.9_2/lib -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2   "
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libxslt.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libxslt.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libpthread.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libpthread.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libicucore.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libicucore.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libm.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libm.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libexslt.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libexslt.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */

| pkg-config --cflags-only-I libexslt
=> "-I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2\n"
| pkg-config --cflags-only-other libexslt
=> "\n"
| pkg-config --libs-only-l libexslt
=> "-lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2\n"
package configuration for libexslt
cflags: 
ldflags: -L/usr/local/Cellar/libxml2/2.9.9_2/lib
libs: -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2

"clang -E -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I. -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2     conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <libxml/xmlversion.h>
/* end */

"clang -E -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I. -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2     conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <libxml/xmlversion.h>
4: #if LIBXML_VERSION < 20621
5: #error libxml2 is older than 2.6.21
6: #endif
/* end */

"clang -E -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I. -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2     conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <libxml/xmlversion.h>
4: #if LIBXML_VERSION < 20903
5: #error libxml2 is older than 2.9.3
6: #endif
/* end */

have_func: checking for xmlParseDoc() in libxml/parser.h... -------------------- no

"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I. -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2    conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib     -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lruby.2.6  -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2   "
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libxslt.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libxslt.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libpthread.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libpthread.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libm.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libm.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libicucore.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libicucore.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libexslt.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libexslt.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd
Undefined symbols for architecture x86_64:
  "___stack_chk_fail", referenced from:
      _main in conftest-a5578a.o
      _t in conftest-a5578a.o
  "___stack_chk_guard", referenced from:
      _main in conftest-a5578a.o
      _t in conftest-a5578a.o
  "_printf", referenced from:
      _main in conftest-a5578a.o
ld: symbol(s) not found for architecture x86_64
clang-4.0: error: linker command failed with exit code 1 (use -v to see invocation)
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: #include <libxml/parser.h>
 4: 
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     int (* volatile tp)(void)=(int (*)(void))&t;
11:     printf("%d", (*tp)());
12:   }
13: 
14:   return 0;
15: }
16: int t(void) { void ((*volatile p)()); p = (void ((*)()))xmlParseDoc; return !p; }
/* end */

"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I. -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2    conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib     -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lruby.2.6  -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2   "
conftest.c:16:13: error: conflicting types for 'xmlParseDoc'
extern void xmlParseDoc();
            ^
/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2/libxml/parser.h:842:3: note: previous declaration is here
                xmlParseDoc             (const xmlChar *cur);
                ^
conftest.c:17:27: error: too few arguments to function call, single argument 'cur' was not specified
int t(void) { xmlParseDoc(); return 0; }
              ~~~~~~~~~~~ ^
/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2/libxml/parser.h:841:11: note: 'xmlParseDoc' declared here
XMLPUBFUN xmlDocPtr XMLCALL
          ^
2 errors generated.
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: #include <libxml/parser.h>
 4: 
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     int (* volatile tp)(void)=(int (*)(void))&t;
11:     printf("%d", (*tp)());
12:   }
13: 
14:   return 0;
15: }
16: extern void xmlParseDoc();
17: int t(void) { xmlParseDoc(); return 0; }
/* end */

--------------------

have_library: checking for xmlParseDoc() in -lxml2... -------------------- no

"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I. -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2    conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib     -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lruby.2.6 -lxml2  -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2   "
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libxslt.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libxslt.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libpthread.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libpthread.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libicucore.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libicucore.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libm.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libm.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libexslt.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libexslt.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd
Undefined symbols for architecture x86_64:
  "___stack_chk_fail", referenced from:
      _main in conftest-c32931.o
      _t in conftest-c32931.o
  "___stack_chk_guard", referenced from:
      _main in conftest-c32931.o
      _t in conftest-c32931.o
  "_printf", referenced from:
      _main in conftest-c32931.o
ld: symbol(s) not found for architecture x86_64
clang-4.0: error: linker command failed with exit code 1 (use -v to see invocation)
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: #include <libxml/parser.h>
 4: 
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     int (* volatile tp)(void)=(int (*)(void))&t;
11:     printf("%d", (*tp)());
12:   }
13: 
14:   return 0;
15: }
16: int t(void) { void ((*volatile p)()); p = (void ((*)()))xmlParseDoc; return !p; }
/* end */

"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I. -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2    conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib     -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lruby.2.6 -lxml2  -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2   "
conftest.c:16:13: error: conflicting types for 'xmlParseDoc'
extern void xmlParseDoc();
            ^
/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2/libxml/parser.h:842:3: note: previous declaration is here
                xmlParseDoc             (const xmlChar *cur);
                ^
conftest.c:17:27: error: too few arguments to function call, single argument 'cur' was not specified
int t(void) { xmlParseDoc(); return 0; }
              ~~~~~~~~~~~ ^
/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2/libxml/parser.h:841:11: note: 'xmlParseDoc' declared here
XMLPUBFUN xmlDocPtr XMLCALL
          ^
2 errors generated.
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: #include <libxml/parser.h>
 4: 
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     int (* volatile tp)(void)=(int (*)(void))&t;
11:     printf("%d", (*tp)());
12:   }
13: 
14:   return 0;
15: }
16: extern void xmlParseDoc();
17: int t(void) { xmlParseDoc(); return 0; }
/* end */

--------------------

have_library: checking for xmlParseDoc() in -llibxml2... -------------------- no

"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I. -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2    conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib     -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lruby.2.6 -llibxml2  -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2   "
ld: library not found for -llibxml2
clang-4.0: error: linker command failed with exit code 1 (use -v to see invocation)
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: #include <libxml/parser.h>
 4: 
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     int (* volatile tp)(void)=(int (*)(void))&t;
11:     printf("%d", (*tp)());
12:   }
13: 
14:   return 0;
15: }
16: int t(void) { void ((*volatile p)()); p = (void ((*)()))xmlParseDoc; return !p; }
/* end */

"x86_64-apple-darwin13.4.0-clang -o conftest -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/x86_64-darwin18 -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0/ruby/backward -I/usr/local/Cellar/ruby/2.6.4_2/include/ruby-2.6.0 -I. -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2 -I/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2  -I/usr/local/opt/libyaml/include -I/usr/local/opt/openssl@1.1/include -I/usr/local/opt/readline/include -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -O3 -ggdb3 -Wall -Wextra -Wdeclaration-after-statement -Wdeprecated-declarations -Wdivision-by-zero -Wimplicit-function-declaration -Wimplicit-int -Wpointer-arith -Wshorten-64-to-32 -Wwrite-strings -Wmissing-noreturn -Wno-constant-logical-operand -Wno-long-long -Wno-missing-field-initializers -Wno-overlength-strings -Wno-parentheses-equality -Wno-self-assign -Wno-tautological-compare -Wno-unused-parameter -Wno-unused-value -Wunused-variable -Wextra-tokens  -fno-common -pipe -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2    conftest.c  -L. -L/usr/local/Cellar/ruby/2.6.4_2/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/openssl@1.1/lib -L/usr/local/opt/readline/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib -L/usr/local/Cellar/libxml2/2.9.9_2/lib     -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lruby.2.6 -llibxml2  -lxml2 -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2 -lexslt -lxslt -lxml2 -lz -lpthread -licucore -lm -lxml2   "
conftest.c:16:13: error: conflicting types for 'xmlParseDoc'
extern void xmlParseDoc();
            ^
/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2/libxml/parser.h:842:3: note: previous declaration is here
                xmlParseDoc             (const xmlChar *cur);
                ^
conftest.c:17:27: error: too few arguments to function call, single argument 'cur' was not specified
int t(void) { xmlParseDoc(); return 0; }
              ~~~~~~~~~~~ ^
/usr/local/Cellar/libxml2/2.9.9_2/include/libxml2/libxml/parser.h:841:11: note: 'xmlParseDoc' declared here
XMLPUBFUN xmlDocPtr XMLCALL
          ^
2 errors generated.
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: #include <libxml/parser.h>
 4: 
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     int (* volatile tp)(void)=(int (*)(void))&t;
11:     printf("%d", (*tp)());
12:   }
13: 
14:   return 0;
15: }
16: extern void xmlParseDoc();
17: int t(void) { xmlParseDoc(); return 0; }
/* end */

--------------------

I tried using custom libraries, as per your tutorial, but I always get either the missing libxml2 or the missing zlib errors.

Could you help me, please?

Thanks.

Jose V.

The text was updated successfully, but these errors were encountered:

flavorjones · 2019-09-09T15:35:23Z

@jvines Sorry you're having troubles.

Looking at the error message for a plain gem install, I see:

checking for gzdopen() in -lz... no
zlib is missing; necessary for building libxml2

Do you have zlib installed on your system? If so, can you tell use the path at which those files are located?

Andrius696 · 2019-09-21T09:03:21Z

#1923 (comment)

flavorjones · 2019-09-22T17:56:02Z

Since it's been a few weeks without a response to the above question from the OP, I'm going to add the will-close label and I'll close this in another week or so (unless there's activity).

jvines · 2019-09-23T18:09:32Z

Hi @flavorjones
I do have zlib installed, I installed it with homebrew actually. The path is /usr/local/Cellar/zlib/1.2.11

Trenix25 · 2019-09-23T19:32:20Z

I can't get nokogiri to build either. This has destroyed my copy of Metasploit. The log file has said that it cannot access C library functions, but gcc isn't having any trouble. I sure hope this problem gets fixed soon so I can reinstall Metasploit. It used to work, but then nokogiri was updated, and now it doesn't. Yes, I have zlib.

flavorjones · 2019-09-24T01:04:13Z

@Trenix25 Sorry you're having trouble, please open a new issue and provide the information requested in the issue template. Thanks.

flavorjones · 2019-09-24T01:06:23Z

@jvines Thanks for that info, I'll take a look when I'm back in front of a computer.

md-farhan-memon · 2019-10-20T07:56:27Z

I am facing the same error while deploying to heroku (stack 18), local it's working properly.

nokogiri v1.10.4

RUBY VERSION
   ruby 2.5.5p157

BUNDLED WITH
   2.0.2

flavorjones · 2020-01-27T14:20:51Z

@jvines The source of the issue is related to these lines in your logs:

Undefined symbols for architecture x86_64:
  "___stack_chk_fail", referenced from:
      _main in conftest-c71f4f.o
      _t in conftest-c71f4f.o
  "___stack_chk_guard", referenced from:
      _main in conftest-c71f4f.o
      _t in conftest-c71f4f.o
  "_printf", referenced from:
      _main in conftest-c71f4f.o
ld: symbol(s) not found for architecture x86_64

There have been similar problems reported, e.g. #1690 that ended up being related to users having a mix of 32- and 64-bit libraries installed (via macports and/or brew). Can you take a look at whether this is the case on your system?

flavorjones · 2020-01-27T14:22:30Z

@md-farhan-memon It seems unlikely you're encountering the exact same problem. Please open a new issue and follow the reporting template for installation problem if you need assistance.

flavorjones · 2020-02-15T13:39:47Z

@jvines I'm curious if you were able to look into your system's configuration? I'll close this in a few days if I don't hear back.

jvines · 2020-02-19T16:54:54Z

Hi @flavorjones , I'm not sure how to check if I have different architecture libraries installed. All I know is I've only installed them through Homebrew. How can I look into this further?

flavorjones · 2020-02-22T18:53:52Z

@jvines Unfortunately I am a Linux user and have no idea how Mac package management works. Maybe start by investigating this:

ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libxslt.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libxslt.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libpthread.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libpthread.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libicucore.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libicucore.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libm.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libm.tbd
ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd, file was built for unsupported file format ( 0x2D 0x2D 0x2D 0x20 0x21 0x74 0x61 0x70 0x69 0x2D 0x74 0x62 0x64 0x2D 0x76 0x33 ) which is not the architecture being linked (x86_64): /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk/usr/lib/libSystem.tbd

I don't know what a .tbd file is, but your linker is trying to use it and rejecting it as a foreign architecture. Perhaps a Mac user forum could help shed some light on this?

mohkale · 2020-04-02T12:11:10Z

I've got the same issue with msys on windows.

flavorjones · 2020-04-02T19:38:23Z

@mohkale It seems unlikely you're encountering the exact same problem. Please open a new issue and follow the reporting template for installation problem if you need assistance.

flavorjones added meta/user-help needs/more-info labels Sep 9, 2019

flavorjones added the state/will-close label Sep 22, 2019

flavorjones removed state/will-close needs/more-info labels Sep 27, 2019

flavorjones added the state/will-close label Feb 15, 2020

flavorjones closed this as completed Apr 2, 2020

Falkor mentioned this issue Apr 16, 2020

Installation on macOS vagrant-libvirt/vagrant-libvirt#818

Closed

flavorjones removed the state/will-close label Feb 16, 2021

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Installation difficulties #1923

Installation difficulties #1923

jvines commented Sep 7, 2019

flavorjones commented Sep 9, 2019

Andrius696 commented Sep 21, 2019

flavorjones commented Sep 22, 2019

jvines commented Sep 23, 2019

Trenix25 commented Sep 23, 2019 •

edited

Loading

flavorjones commented Sep 24, 2019

flavorjones commented Sep 24, 2019

md-farhan-memon commented Oct 20, 2019

flavorjones commented Jan 27, 2020 •

edited

Loading

flavorjones commented Jan 27, 2020

flavorjones commented Feb 15, 2020

jvines commented Feb 19, 2020

flavorjones commented Feb 22, 2020

mohkale commented Apr 2, 2020

flavorjones commented Apr 2, 2020

Installation difficulties #1923

Installation difficulties #1923

Comments

jvines commented Sep 7, 2019

flavorjones commented Sep 9, 2019

Andrius696 commented Sep 21, 2019

flavorjones commented Sep 22, 2019

jvines commented Sep 23, 2019

Trenix25 commented Sep 23, 2019 • edited Loading

flavorjones commented Sep 24, 2019

flavorjones commented Sep 24, 2019

md-farhan-memon commented Oct 20, 2019

flavorjones commented Jan 27, 2020 • edited Loading

flavorjones commented Jan 27, 2020

flavorjones commented Feb 15, 2020

jvines commented Feb 19, 2020

flavorjones commented Feb 22, 2020

mohkale commented Apr 2, 2020

flavorjones commented Apr 2, 2020

Trenix25 commented Sep 23, 2019 •

edited

Loading

flavorjones commented Jan 27, 2020 •

edited

Loading