make mingw fails with undefined reference to _strnlen

[richard-lyman]

• Ubuntu 14.04
• sudo apt-cache show mingw32 : 4.2.1.dfsg-2ubuntu1

...
Linking C executable cmark.exe
CMakeFiles/cmark.dir/objects.a(houdini_html_u.c.obj):houdini_html_u.c:(.text+0x38f): undefined reference to `_strnlen'
collect2: ld returned 1 exit status
...

[jgm]

That's interesting. I have no problems with
Version: 4.9.1-4ubuntu3+14.1

but on another (debian) system with
Version: 4.2.1.dfsg-2
I see the same thing you're seeing.

Must have been added fairly recently.

See also:
http://sourceforge.net/p/mingw/bugs/1912/

We could add a check for strnlen, I suppose, and if not present include
one of the definitions given in that thread? But maybe not worth the
hassle, since newer versions of mingw seem to work.

[nwellnhof]

Seems related to feature test macros. We probably have to compile with _POSIX_C_SOURCE in addition to _GNU_SOURCE. Can you check whether the following patch helps?

nwellnhof@dddc482

[richard-lyman]

Same error with patch.

[richard-lyman]

I ran and have since re-run with 'make clean' and it still shows the same
error.

On Sun, Feb 1, 2015 at 3:17 PM, Nick Wellnhofer notifications@github.com
wrote:

Did you maybe compile from previous checkout without running make clean?
If not, can you post the whole output of make VERBOSE=1?

—
Reply to this email directly or view it on GitHub
#4 (comment).

[nwellnhof]

OK, then we should simply avoid strnlen. I'll probably have a fix ready by tomorrow.

[richard-lyman]

Result of make VERBOSE=1 mingw after a make clean:

mkdir -p build-mingw; \
    cd build-mingw; \
    cmake .. -DCMAKE_TOOLCHAIN_FILE=../toolchain-mingw32.cmake -DCMAKE_INSTALL_PREFIX=windows ;\
    make && make install
Re-run cmake no build system arguments
-- The C compiler identification is GNU 4.2.1
-- The CXX compiler identification is GNU 4.2.1
-- Check for working C compiler: /usr/bin/i586-mingw32msvc-gcc
-- Check for working C compiler: /usr/bin/i586-mingw32msvc-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/i586-mingw32msvc-g++
-- Check for working CXX compiler: /usr/bin/i586-mingw32msvc-g++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Performing Test COMPILER_HAS_DEPRECATED_ATTR
-- Performing Test COMPILER_HAS_DEPRECATED_ATTR - Success
-- Looking for stdbool.h
-- Looking for stdbool.h - found
-- Performing Test HAVE___BUILTIN_EXPECT
-- Performing Test HAVE___BUILTIN_EXPECT - Success
-- Performing Test HAVE___ATTRIBUTE__
-- Performing Test HAVE___ATTRIBUTE__ - Success
-- Looking for va_copy
-- Looking for va_copy - found
-- Found PythonInterp: /usr/bin/python3 (found suitable version "3.4", minimum required is "3") 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/user/dl/cmark/cmark/build-mingw
make[1]: Entering directory `/home/user/dl/cmark/cmark/build-mingw'
/usr/bin/cmake -H/home/user/dl/cmark/cmark -B/home/user/dl/cmark/cmark/build-mingw --check-build-system CMakeFiles/Makefile.cmake 0
/usr/bin/cmake -E cmake_progress_start /home/user/dl/cmark/cmark/build-mingw/CMakeFiles /home/user/dl/cmark/cmark/build-mingw/CMakeFiles/progress.marks
make -f CMakeFiles/Makefile2 all
make[2]: Entering directory `/home/user/dl/cmark/cmark/build-mingw'
make -f src/CMakeFiles/cmark.dir/build.make src/CMakeFiles/cmark.dir/depend
make[3]: Entering directory `/home/user/dl/cmark/cmark/build-mingw'
cd /home/user/dl/cmark/cmark/build-mingw && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/user/dl/cmark/cmark /home/user/dl/cmark/cmark/src /home/user/dl/cmark/cmark/build-mingw /home/user/dl/cmark/cmark/build-mingw/src /home/user/dl/cmark/cmark/build-mingw/src/CMakeFiles/cmark.dir/DependInfo.cmake --color=
Dependee "/home/user/dl/cmark/cmark/build-mingw/src/CMakeFiles/cmark.dir/DependInfo.cmake" is newer than depender "/home/user/dl/cmark/cmark/build-mingw/src/CMakeFiles/cmark.dir/depend.internal".
Dependee "/home/user/dl/cmark/cmark/build-mingw/src/CMakeFiles/CMakeDirectoryInformation.cmake" is newer than depender "/home/user/dl/cmark/cmark/build-mingw/src/CMakeFiles/cmark.dir/depend.internal".
Scanning dependencies of target cmark
make[3]: Leaving directory `/home/user/dl/cmark/cmark/build-mingw'
make -f src/CMakeFiles/cmark.dir/build.make src/CMakeFiles/cmark.dir/build
make[3]: Entering directory `/home/user/dl/cmark/cmark/build-mingw'
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 4
[  2%] Building C object src/CMakeFiles/cmark.dir/cmark.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/cmark.c.obj   -c /home/user/dl/cmark/cmark/src/cmark.c
/home/user/dl/cmark/cmark/src/cmark.c: In function ‘cmark_markdown_to_html’:
/home/user/dl/cmark/cmark/src/cmark.c:23: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/cmark.c: At top level:
/home/user/dl/cmark/cmark/src/cmark.c:23: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/cmark.c:23: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 5
[  5%] Building C object src/CMakeFiles/cmark.dir/node.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/node.c.obj   -c /home/user/dl/cmark/cmark/src/node.c
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_type’:
/home/user/dl/cmark/cmark/src/node.c:162: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_type_string’:
/home/user/dl/cmark/cmark/src/node.c:213: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_next’:
/home/user/dl/cmark/cmark/src/node.c:223: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_previous’:
/home/user/dl/cmark/cmark/src/node.c:233: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_parent’:
/home/user/dl/cmark/cmark/src/node.c:243: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_first_child’:
/home/user/dl/cmark/cmark/src/node.c:253: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_last_child’:
/home/user/dl/cmark/cmark/src/node.c:263: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_user_data’:
/home/user/dl/cmark/cmark/src/node.c:272: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_set_user_data’:
/home/user/dl/cmark/cmark/src/node.c:281: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_header_level’:
/home/user/dl/cmark/cmark/src/node.c:358: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_set_header_level’:
/home/user/dl/cmark/cmark/src/node.c:377: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_list_type’:
/home/user/dl/cmark/cmark/src/node.c:391: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_set_list_type’:
/home/user/dl/cmark/cmark/src/node.c:410: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_list_delim’:
/home/user/dl/cmark/cmark/src/node.c:424: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_set_list_delim’:
/home/user/dl/cmark/cmark/src/node.c:443: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_list_start’:
/home/user/dl/cmark/cmark/src/node.c:457: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_set_list_start’:
/home/user/dl/cmark/cmark/src/node.c:472: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_list_tight’:
/home/user/dl/cmark/cmark/src/node.c:486: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_set_list_tight’:
/home/user/dl/cmark/cmark/src/node.c:501: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_url’:
/home/user/dl/cmark/cmark/src/node.c:548: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_title’:
/home/user/dl/cmark/cmark/src/node.c:586: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_start_line’:
/home/user/dl/cmark/cmark/src/node.c:615: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_start_column’:
/home/user/dl/cmark/cmark/src/node.c:624: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_end_line’:
/home/user/dl/cmark/cmark/src/node.c:633: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_end_column’:
/home/user/dl/cmark/cmark/src/node.c:642: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_unlink’:
/home/user/dl/cmark/cmark/src/node.c:680: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_set_title’:
/home/user/dl/cmark/cmark/src/node.c:606: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_new’:
/home/user/dl/cmark/cmark/src/node.c:101: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_insert_after’:
/home/user/dl/cmark/cmark/src/node.c:750: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_free’:
/home/user/dl/cmark/cmark/src/node.c:152: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_check’:
/home/user/dl/cmark/cmark/src/node.c:871: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_insert_before’:
/home/user/dl/cmark/cmark/src/node.c:715: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_append_child’:
/home/user/dl/cmark/cmark/src/node.c:802: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_prepend_child’:
/home/user/dl/cmark/cmark/src/node.c:776: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_set_url’:
/home/user/dl/cmark/cmark/src/node.c:568: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_fence_info’:
/home/user/dl/cmark/cmark/src/node.c:515: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_get_literal’:
/home/user/dl/cmark/cmark/src/node.c:314: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_set_literal’:
/home/user/dl/cmark/cmark/src/node.c:340: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/node.c: In function ‘cmark_node_set_fence_info’:
/home/user/dl/cmark/cmark/src/node.c:530: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 6
[  8%] Building C object src/CMakeFiles/cmark.dir/iterator.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/iterator.c.obj   -c /home/user/dl/cmark/cmark/src/iterator.c
/home/user/dl/cmark/cmark/src/iterator.c: In function ‘cmark_iter_next’:
/home/user/dl/cmark/cmark/src/iterator.c:88: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/iterator.c: In function ‘cmark_iter_get_node’:
/home/user/dl/cmark/cmark/src/iterator.c:103: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/iterator.c: In function ‘cmark_iter_get_event_type’:
/home/user/dl/cmark/cmark/src/iterator.c:109: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/iterator.c: In function ‘cmark_iter_get_root’:
/home/user/dl/cmark/cmark/src/iterator.c:115: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/iterator.c: In function ‘cmark_iter_free’:
/home/user/dl/cmark/cmark/src/iterator.c:41: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/iterator.c: In function ‘cmark_iter_new’:
/home/user/dl/cmark/cmark/src/iterator.c:35: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/iterator.c: In function ‘cmark_consolidate_text_nodes’:
/home/user/dl/cmark/cmark/src/iterator.c:146: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/iterator.c: In function ‘cmark_iter_reset’:
/home/user/dl/cmark/cmark/src/iterator.c:97: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 7
[ 11%] Building C object src/CMakeFiles/cmark.dir/blocks.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/blocks.c.obj   -c /home/user/dl/cmark/cmark/src/blocks.c
/home/user/dl/cmark/cmark/src/blocks.c: In function ‘cmark_parser_free’:
/home/user/dl/cmark/cmark/src/blocks.c:81: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/blocks.c: In function ‘cmark_parser_new’:
/home/user/dl/cmark/cmark/src/blocks.c:71: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/blocks.c: In function ‘cmark_parser_finish’:
/home/user/dl/cmark/cmark/src/blocks.c:878: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/blocks.c: In function ‘cmark_parser_feed’:
/home/user/dl/cmark/cmark/src/blocks.c:460: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/blocks.c: In function ‘cmark_parse_document’:
/home/user/dl/cmark/cmark/src/blocks.c:454: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/blocks.c: In function ‘cmark_parse_file’:
/home/user/dl/cmark/cmark/src/blocks.c:442: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 8
[ 13%] Building C object src/CMakeFiles/cmark.dir/inlines.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/inlines.c.obj   -c /home/user/dl/cmark/cmark/src/inlines.c
/home/user/dl/cmark/cmark/src/inlines.c: In function ‘cmark_clean_title’:
/home/user/dl/cmark/cmark/src/inlines.c:581: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/inlines.c: In function ‘cmark_clean_url’:
/home/user/dl/cmark/cmark/src/inlines.c:557: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/inlines.c: In function ‘cmark_parse_reference_inline’:
/home/user/dl/cmark/cmark/src/inlines.c:1031: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/inlines.c: In function ‘cmark_parse_inlines’:
/home/user/dl/cmark/cmark/src/inlines.c:957: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 9
[ 16%] Building C object src/CMakeFiles/cmark.dir/scanners.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/scanners.c.obj   -c /home/user/dl/cmark/cmark/src/scanners.c
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_at’:
/home/user/dl/cmark/cmark/src/scanners.c:17: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_autolink_uri’:
/home/user/dl/cmark/cmark/src/scanners.c:2959: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_autolink_email’:
/home/user/dl/cmark/cmark/src/scanners.c:7904: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_html_tag’:
/home/user/dl/cmark/cmark/src/scanners.c:8555: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_html_block_tag’:
/home/user/dl/cmark/cmark/src/scanners.c:10341: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_link_url’:
/home/user/dl/cmark/cmark/src/scanners.c:10792: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_link_title’:
/home/user/dl/cmark/cmark/src/scanners.c:10984: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_spacechars’:
/home/user/dl/cmark/cmark/src/scanners.c:11054: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_atx_header_start’:
/home/user/dl/cmark/cmark/src/scanners.c:11163: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_setext_header_line’:
/home/user/dl/cmark/cmark/src/scanners.c:11278: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_hrule’:
/home/user/dl/cmark/cmark/src/scanners.c:11463: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_open_code_fence’:
/home/user/dl/cmark/cmark/src/scanners.c:11588: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_close_code_fence’:
/home/user/dl/cmark/cmark/src/scanners.c:11717: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/scanners.c: In function ‘_scan_entity’:
/home/user/dl/cmark/cmark/src/scanners.c:12391: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 10
[ 19%] Building C object src/CMakeFiles/cmark.dir/utf8.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/utf8.c.obj   -c /home/user/dl/cmark/cmark/src/utf8.c
/home/user/dl/cmark/cmark/src/utf8.c: In function ‘utf8proc_iterate’:
/home/user/dl/cmark/cmark/src/utf8.c:190: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/utf8.c: In function ‘utf8proc_is_space’:
/home/user/dl/cmark/cmark/src/utf8.c:267: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/utf8.c: In function ‘utf8proc_is_punctuation’:
/home/user/dl/cmark/cmark/src/utf8.c:453: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/utf8.c: In function ‘utf8proc_encode_char’:
/home/user/dl/cmark/cmark/src/utf8.c:229: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/utf8.c: In function ‘utf8proc_detab’:
/home/user/dl/cmark/cmark/src/utf8.c:152: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/utf8.c: In function ‘utf8proc_case_fold’:
/home/user/dl/cmark/cmark/src/utf8.c:251: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 11
[ 22%] Building C object src/CMakeFiles/cmark.dir/buffer.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/buffer.c.obj   -c /home/user/dl/cmark/cmark/src/buffer.c
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_oom’:
/home/user/dl/cmark/cmark/src/buffer.c:90: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_len’:
/home/user/dl/cmark/cmark/src/buffer.c:95: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_clear’:
/home/user/dl/cmark/cmark/src/buffer.c:113: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_swap’:
/home/user/dl/cmark/cmark/src/buffer.c:233: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_strrchr’:
/home/user/dl/cmark/cmark/src/buffer.c:290: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_truncate’:
/home/user/dl/cmark/cmark/src/buffer.c:298: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_rtrim’:
/home/user/dl/cmark/cmark/src/buffer.c:324: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_drop’:
/home/user/dl/cmark/cmark/src/buffer.c:309: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_copy_cstr’:
/home/user/dl/cmark/cmark/src/buffer.c:226: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_strchr’:
/home/user/dl/cmark/cmark/src/buffer.c:278: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_cmp’:
/home/user/dl/cmark/cmark/src/buffer.c:269: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_try_grow’:
/home/user/dl/cmark/cmark/src/buffer.c:80: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_normalize_whitespace’:
/home/user/dl/cmark/cmark/src/buffer.c:366: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_unescape’:
/home/user/dl/cmark/cmark/src/buffer.c:381: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_trim’:
/home/user/dl/cmark/cmark/src/buffer.c:339: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_grow’:
/home/user/dl/cmark/cmark/src/buffer.c:85: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_put’:
/home/user/dl/cmark/cmark/src/buffer.c:155: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_putc’:
/home/user/dl/cmark/cmark/src/buffer.c:143: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_set’:
/home/user/dl/cmark/cmark/src/buffer.c:128: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_init’:
/home/user/dl/cmark/cmark/src/buffer.c:34: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_vprintf’:
/home/user/dl/cmark/cmark/src/buffer.c:196: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_printf’:
/home/user/dl/cmark/cmark/src/buffer.c:208: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_detach’:
/home/user/dl/cmark/cmark/src/buffer.c:246: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_free’:
/home/user/dl/cmark/cmark/src/buffer.c:105: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_attach’:
/home/user/dl/cmark/cmark/src/buffer.c:262: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_puts’:
/home/user/dl/cmark/cmark/src/buffer.c:160: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: In function ‘cmark_strbuf_sets’:
/home/user/dl/cmark/cmark/src/buffer.c:135: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c: At top level:
/home/user/dl/cmark/cmark/src/buffer.c:381: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/buffer.c:381: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 12
[ 25%] Building C object src/CMakeFiles/cmark.dir/references.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/references.c.obj   -c /home/user/dl/cmark/cmark/src/references.c
/home/user/dl/cmark/cmark/src/references.c: In function ‘cmark_reference_map_new’:
/home/user/dl/cmark/cmark/src/references.c:154: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/references.c: In function ‘cmark_reference_create’:
/home/user/dl/cmark/cmark/src/references.c:96: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/references.c: In function ‘cmark_reference_map_free’:
/home/user/dl/cmark/cmark/src/references.c:149: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/references.c: In function ‘cmark_reference_lookup’:
/home/user/dl/cmark/cmark/src/references.c:128: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 13
[ 27%] Building C object src/CMakeFiles/cmark.dir/man.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/man.c.obj   -c /home/user/dl/cmark/cmark/src/man.c
/home/user/dl/cmark/cmark/src/man.c: In function ‘cmark_render_man’:
/home/user/dl/cmark/cmark/src/man.c:250: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 14
[ 30%] Building C object src/CMakeFiles/cmark.dir/xml.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/xml.c.obj   -c /home/user/dl/cmark/cmark/src/xml.c
/home/user/dl/cmark/cmark/src/xml.c: In function ‘cmark_render_xml’:
/home/user/dl/cmark/cmark/src/xml.c:174: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 15
[ 33%] Building C object src/CMakeFiles/cmark.dir/html.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/html.c.obj   -c /home/user/dl/cmark/cmark/src/html.c
/home/user/dl/cmark/cmark/src/html.c: In function ‘cmark_render_html’:
/home/user/dl/cmark/cmark/src/html.c:323: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 16
[ 36%] Building C object src/CMakeFiles/cmark.dir/houdini_href_e.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/houdini_href_e.c.obj   -c /home/user/dl/cmark/cmark/src/houdini_href_e.c
/home/user/dl/cmark/cmark/src/houdini_href_e.c: In function ‘houdini_escape_href’:
/home/user/dl/cmark/cmark/src/houdini_href_e.c:107: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 17
[ 38%] Building C object src/CMakeFiles/cmark.dir/houdini_html_e.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/houdini_html_e.c.obj   -c /home/user/dl/cmark/cmark/src/houdini_html_e.c
/home/user/dl/cmark/cmark/src/houdini_html_e.c: In function ‘houdini_escape_html0’:
/home/user/dl/cmark/cmark/src/houdini_html_e.c:75: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/houdini_html_e.c: In function ‘houdini_escape_html’:
/home/user/dl/cmark/cmark/src/houdini_html_e.c:81: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 18
[ 41%] Building C object src/CMakeFiles/cmark.dir/houdini_html_u.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/houdini_html_u.c.obj   -c /home/user/dl/cmark/cmark/src/houdini_html_u.c
/home/user/dl/cmark/cmark/src/houdini_html_u.c: In function ‘houdini_unescape_ent’:
/home/user/dl/cmark/cmark/src/houdini_html_u.c:58: warning: implicit declaration of function ‘strnlen’
src/html_unescape.gperf: In function ‘find_entity’:
src/html_unescape.gperf:351: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/houdini_html_u.c: In function ‘houdini_unescape_ent’:
/home/user/dl/cmark/cmark/src/houdini_html_u.c:69: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/houdini_html_u.c: In function ‘houdini_unescape_html’:
/home/user/dl/cmark/cmark/src/houdini_html_u.c:107: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/houdini_html_u.c: In function ‘houdini_unescape_html_f’:
/home/user/dl/cmark/cmark/src/houdini_html_u.c:113: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 19
[ 44%] Building C object src/CMakeFiles/cmark.dir/cmark_ctype.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/cmark_ctype.c.obj   -c /home/user/dl/cmark/cmark/src/cmark_ctype.c
/home/user/dl/cmark/cmark/src/cmark_ctype.c: In function ‘cmark_isspace’:
/home/user/dl/cmark/cmark/src/cmark_ctype.c:33: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/cmark_ctype.c: In function ‘cmark_ispunct’:
/home/user/dl/cmark/cmark/src/cmark_ctype.c:41: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/cmark_ctype.c: In function ‘cmark_isalnum’:
/home/user/dl/cmark/cmark/src/cmark_ctype.c:48: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/cmark_ctype.c: In function ‘cmark_isdigit’:
/home/user/dl/cmark/cmark/src/cmark_ctype.c:53: warning: visibility attribute not supported in this configuration; ignored
/usr/bin/cmake -E cmake_progress_report /home/user/dl/cmark/cmark/build-mingw/CMakeFiles 20
[ 47%] Building C object src/CMakeFiles/cmark.dir/main.c.obj
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG @CMakeFiles/cmark.dir/includes_C.rsp   -DCMARK_STATIC_DEFINE -o CMakeFiles/cmark.dir/main.c.obj   -c /home/user/dl/cmark/cmark/src/main.c
/home/user/dl/cmark/cmark/src/main.c: In function ‘main’:
/home/user/dl/cmark/cmark/src/main.c:68: warning: implicit declaration of function ‘_fileno’
/home/user/dl/cmark/cmark/src/main.c: In function ‘print_usage’:
/home/user/dl/cmark/cmark/src/main.c:32: warning: visibility attribute not supported in this configuration; ignored
/home/user/dl/cmark/cmark/src/main.c: In function ‘main’:
/home/user/dl/cmark/cmark/src/main.c:163: warning: visibility attribute not supported in this configuration; ignored
Linking C executable cmark.exe
cd /home/user/dl/cmark/cmark/build-mingw/src && /usr/bin/cmake -E cmake_link_script CMakeFiles/cmark.dir/link.txt --verbose=1
/usr/bin/cmake -E remove -f CMakeFiles/cmark.dir/objects.a
/usr/bin/i586-mingw32msvc-ar cr CMakeFiles/cmark.dir/objects.a @CMakeFiles/cmark.dir/objects1.rsp
/usr/bin/i586-mingw32msvc-gcc   -fvisibility=hidden -Wall -Wextra -std=c99 -pedantic -D_GNU_SOURCE -O3 -DNDEBUG    -Wl,--whole-archive CMakeFiles/cmark.dir/objects.a -Wl,--no-whole-archive  -o cmark.exe -Wl,--out-implib,libcmark.dll.a -Wl,--major-image-version,0,--minor-image-version,0  -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32 
CMakeFiles/cmark.dir/objects.a(houdini_html_u.c.obj):houdini_html_u.c:(.text+0x38f): undefined reference to `_strnlen'
collect2: ld returned 1 exit status
make[3]: *** [src/cmark.exe] Error 1
make[3]: Leaving directory `/home/user/dl/cmark/cmark/build-mingw'
make[2]: *** [src/CMakeFiles/cmark.dir/all] Error 2
make[2]: Leaving directory `/home/user/dl/cmark/cmark/build-mingw'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/home/user/dl/cmark/cmark/build-mingw'
make: *** [mingw] Error 2

[jgm]

Confirmed: With this fix I can build with the older mingw version. Thanks!

[richard-lyman]

Works for me as well - thanks for the quick response.