cannot link to pthread

[old-memories]

[root@iZuf609uyxtf9dw6jr2adgZ ubdsrv]# autoreconf -i
[root@iZuf609uyxtf9dw6jr2adgZ ubdsrv]# export LIBURING_DIR=/work/liburing-liburing-2.2; PKG_CONFIG_PATH=${LIBURING_DIR} ./configure CFLAGS="-I${LIBURING_DIR}/src/include" CXXFLAGS="-I${LIBURING_DIR}/src/include" LDFLAGS="-L${LIBURING_DIR}/src"
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking whether gcc understands -c and -o together... yes
checking how to run the C preprocessor... gcc -E
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking minix/config.h usability... no
checking minix/config.h presence... no
checking for minix/config.h... no
checking whether it is safe to define EXTENSIONS... yes
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /usr/bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports the include directive... yes (GNU style)
checking whether make supports nested variables... yes
checking dependency style of gcc... gcc3
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking how to print strings... printf
checking for a sed that does not truncate output... /usr/bin/sed
checking for fgrep... /usr/bin/grep -F
checking for ld used by gcc... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
checking the name lister (/usr/bin/nm -B) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 1572864
checking how to convert x86_64-pc-linux-gnu file names to x86_64-pc-linux-gnu format... func_convert_file_noop
checking how to convert x86_64-pc-linux-gnu file names to toolchain format... func_convert_file_noop
checking for /usr/bin/ld option to reload object files... -r
checking for objdump... objdump
checking how to recognize dependent libraries... pass_all
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for ar... ar
checking for archiver @file support... @
checking for strip... strip
checking for ranlib... ranlib
checking command to parse /usr/bin/nm -B output from gcc object... ok
checking for sysroot... no
checking for a working dd... /usr/bin/dd
checking how to truncate binary pipes... /usr/bin/dd bs=4096 count=1
checking for mt... no
checking if : is a manifest tool... no
checking for dlfcn.h... yes
checking for objdir... .libs
checking if gcc supports -fno-rtti -fno-exceptions... no
checking for gcc option to produce PIC... -fPIC -DPIC
checking if gcc PIC flag -fPIC -DPIC works... yes
checking if gcc static flag -static works... no
checking if gcc supports -c -o file.o... yes
checking if gcc supports -c -o file.o... (cached) yes
checking whether the gcc linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking for a sed that does not truncate output... (cached) /usr/bin/sed
checking for gcc... (cached) gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for gcc option to accept ISO C89... (cached) none needed
checking whether gcc understands -c and -o together... (cached) yes
checking how to run the C preprocessor... gcc -E
checking for function prototypes... yes
checking whether gcc is Clang... no
checking whether pthreads work with -pthread... yes
checking for joinable pthread attribute... PTHREAD_CREATE_JOINABLE
checking whether more special flags are required for pthreads... no
checking for PTHREAD_PRIO_INHERIT... yes
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking dependency style of g++... gcc3
checking how to run the C++ preprocessor... g++ -E
checking for ld used by g++... /usr/bin/ld -m elf_x86_64
checking if the linker (/usr/bin/ld -m elf_x86_64) is GNU ld... yes
checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking for g++ option to produce PIC... -fPIC -DPIC
checking if g++ PIC flag -fPIC -DPIC works... yes
checking if g++ static flag -static works... no
checking if g++ supports -c -o file.o... yes
checking if g++ supports -c -o file.o... (cached) yes
checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking dynamic linker characteristics... (cached) GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for LIBURING... yes
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating include/Makefile
config.status: creating lib/Makefile
config.status: creating tests/Makefile
config.status: creating ublksrv.pc
config.status: creating config.h
config.status: config.h is unchanged
config.status: executing depfiles commands
config.status: executing libtool commands
[root@iZuf609uyxtf9dw6jr2adgZ ubdsrv]# make clean && make
Making clean in include
make[1]: Entering directory '/root/work/ubdsrv/include'
rm -rf .libs _libs
rm -f .lo
make[1]: Leaving directory '/root/work/ubdsrv/include'
Making clean in lib
make[1]: Entering directory '/root/work/ubdsrv/lib'
test -z " .d" || rm -f *~ .d
test -z "libublksrv.la" || rm -f libublksrv.la
rm -f ./so_locations
rm -rf .libs _libs
rm -f .o
rm -f .lo
make[1]: Leaving directory '/root/work/ubdsrv/lib'
Making clean in tests
make[1]: Entering directory '/root/work/ubdsrv/tests'
test -z "~ /" || rm -f * /~
rm -rf .libs _libs
rm -f .lo
make[1]: Leaving directory '/root/work/ubdsrv/tests'
make[1]: Entering directory '/root/work/ubdsrv'
rm -f ublk demo_null demo_event
test -z "~ test cscope. include/~ .d" || rm -f *~ test cscope. include/~ *.d
rm -rf .libs _libs
rm -f *.o
rm -f *.lo
make[1]: Leaving directory '/root/work/ubdsrv'
make all-recursive
make[1]: Entering directory '/root/work/ubdsrv'
Making all in include
make[2]: Entering directory '/root/work/ubdsrv/include'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/root/work/ubdsrv/include'
Making all in lib
make[2]: Entering directory '/root/work/ubdsrv/lib'
/bin/sh ../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I.. -I../include -pthread -I/root/work/liburing-liburing-2.2/src/include -MT libublksrv_la-ublksrv_cmd.lo -MD -MP -MF .deps/libublksrv_la-ublksrv_cmd.Tpo -c -o libublksrv_la-ublksrv_cmd.lo test -f 'ublksrv_cmd.c' || echo './'ublksrv_cmd.c
libtool: compile: gcc -DHAVE_CONFIG_H -I. -I.. -I../include -pthread -I/root/work/liburing-liburing-2.2/src/include -MT libublksrv_la-ublksrv_cmd.lo -MD -MP -MF .deps/libublksrv_la-ublksrv_cmd.Tpo -c ublksrv_cmd.c -fPIC -DPIC -o .libs/libublksrv_la-ublksrv_cmd.o
libtool: compile: gcc -DHAVE_CONFIG_H -I. -I.. -I../include -pthread -I/root/work/liburing-liburing-2.2/src/include -MT libublksrv_la-ublksrv_cmd.lo -MD -MP -MF .deps/libublksrv_la-ublksrv_cmd.Tpo -c ublksrv_cmd.c -o libublksrv_la-ublksrv_cmd.o >/dev/null 2>&1
mv -f .deps/libublksrv_la-ublksrv_cmd.Tpo .deps/libublksrv_la-ublksrv_cmd.Plo
/bin/sh ../libtool --tag=CXX --mode=compile g++ -DHAVE_CONFIG_H -I. -I.. -I../include -I/root/work/liburing-liburing-2.2/src/include -MT libublksrv_la-ublksrv_json.lo -MD -MP -MF .deps/libublksrv_la-ublksrv_json.Tpo -c -o libublksrv_la-ublksrv_json.lo test -f 'ublksrv_json.cpp' || echo './'ublksrv_json.cpp
libtool: compile: g++ -DHAVE_CONFIG_H -I. -I.. -I../include -I/root/work/liburing-liburing-2.2/src/include -MT libublksrv_la-ublksrv_json.lo -MD -MP -MF .deps/libublksrv_la-ublksrv_json.Tpo -c ublksrv_json.cpp -fPIC -DPIC -o .libs/libublksrv_la-ublksrv_json.o
libtool: compile: g++ -DHAVE_CONFIG_H -I. -I.. -I../include -I/root/work/liburing-liburing-2.2/src/include -MT libublksrv_la-ublksrv_json.lo -MD -MP -MF .deps/libublksrv_la-ublksrv_json.Tpo -c ublksrv_json.cpp -o libublksrv_la-ublksrv_json.o >/dev/null 2>&1
mv -f .deps/libublksrv_la-ublksrv_json.Tpo .deps/libublksrv_la-ublksrv_json.Plo
/bin/sh ../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I.. -I../include -pthread -I/root/work/liburing-liburing-2.2/src/include -MT libublksrv_la-ublksrv.lo -MD -MP -MF .deps/libublksrv_la-ublksrv.Tpo -c -o libublksrv_la-ublksrv.lo test -f 'ublksrv.c' || echo './'ublksrv.c
libtool: compile: gcc -DHAVE_CONFIG_H -I. -I.. -I../include -pthread -I/root/work/liburing-liburing-2.2/src/include -MT libublksrv_la-ublksrv.lo -MD -MP -MF .deps/libublksrv_la-ublksrv.Tpo -c ublksrv.c -fPIC -DPIC -o .libs/libublksrv_la-ublksrv.o
libtool: compile: gcc -DHAVE_CONFIG_H -I. -I.. -I../include -pthread -I/root/work/liburing-liburing-2.2/src/include -MT libublksrv_la-ublksrv.lo -MD -MP -MF .deps/libublksrv_la-ublksrv.Tpo -c ublksrv.c -o libublksrv_la-ublksrv.o >/dev/null 2>&1
mv -f .deps/libublksrv_la-ublksrv.Tpo .deps/libublksrv_la-ublksrv.Plo
/bin/sh ../libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I.. -I../include -pthread -I/root/work/liburing-liburing-2.2/src/include -MT libublksrv_la-utils.lo -MD -MP -MF .deps/libublksrv_la-utils.Tpo -c -o libublksrv_la-utils.lo test -f 'utils.c' || echo './'utils.c
libtool: compile: gcc -DHAVE_CONFIG_H -I. -I.. -I../include -pthread -I/root/work/liburing-liburing-2.2/src/include -MT libublksrv_la-utils.lo -MD -MP -MF .deps/libublksrv_la-utils.Tpo -c utils.c -fPIC -DPIC -o .libs/libublksrv_la-utils.o
libtool: compile: gcc -DHAVE_CONFIG_H -I. -I.. -I../include -pthread -I/root/work/liburing-liburing-2.2/src/include -MT libublksrv_la-utils.lo -MD -MP -MF .deps/libublksrv_la-utils.Tpo -c utils.c -o libublksrv_la-utils.o >/dev/null 2>&1
mv -f .deps/libublksrv_la-utils.Tpo .deps/libublksrv_la-utils.Plo
/bin/sh ../libtool --tag=CXX --mode=link g++ -I/root/work/liburing-liburing-2.2/src/include -version-info 0:0:0 -L/root/work/liburing-liburing-2.2/src -o libublksrv.la -rpath /usr/local/lib libublksrv_la-ublksrv_cmd.lo libublksrv_la-ublksrv_json.lo libublksrv_la-ublksrv.lo libublksrv_la-utils.lo -L/usr/lib -luring
libtool: link: g++ -fPIC -DPIC -shared -nostdlib /usr/lib/gcc/x86_64-redhat-linux/10/../../../../lib64/crti.o /usr/lib/gcc/x86_64-redhat-linux/10/crtbeginS.o .libs/libublksrv_la-ublksrv_cmd.o .libs/libublksrv_la-ublksrv_json.o .libs/libublksrv_la-ublksrv.o .libs/libublksrv_la-utils.o -L/root/work/liburing-liburing-2.2/src -L/usr/lib -luring -L/usr/lib/gcc/x86_64-redhat-linux/10 -L/usr/lib/gcc/x86_64-redhat-linux/10/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/usr/lib/gcc/x86_64-redhat-linux/10/../../.. -lstdc++ -lm -lc -lgcc_s /usr/lib/gcc/x86_64-redhat-linux/10/crtendS.o /usr/lib/gcc/x86_64-redhat-linux/10/../../../../lib64/crtn.o -Wl,-soname -Wl,libublksrv.so.0 -o .libs/libublksrv.so.0.0.0
libtool: link: (cd ".libs" && rm -f "libublksrv.so.0" && ln -s "libublksrv.so.0.0.0" "libublksrv.so.0")
libtool: link: (cd ".libs" && rm -f "libublksrv.so" && ln -s "libublksrv.so.0.0.0" "libublksrv.so")
libtool: link: ar cru .libs/libublksrv.a libublksrv_la-ublksrv_cmd.o libublksrv_la-ublksrv_json.o libublksrv_la-ublksrv.o libublksrv_la-utils.o
libtool: link: ranlib .libs/libublksrv.a
libtool: link: ( cd ".libs" && rm -f "libublksrv.la" && ln -s "../libublksrv.la" "libublksrv.la" )
make[2]: Leaving directory '/root/work/ubdsrv/lib'
Making all in tests
make[2]: Entering directory '/root/work/ubdsrv/tests'
make[2]: Nothing to be done for 'all'.
make[2]: Leaving directory '/root/work/ubdsrv/tests'
make[2]: Entering directory '/root/work/ubdsrv'
g++ -DHAVE_CONFIG_H -I. -I./include -fcoroutines -std=c++20 -I/root/work/liburing-liburing-2.2/src/include -MT ublk-ublksrv_tgt.o -MD -MP -MF .deps/ublk-ublksrv_tgt.Tpo -c -o ublk-ublksrv_tgt.o test -f 'ublksrv_tgt.cpp' || echo './'ublksrv_tgt.cpp
mv -f .deps/ublk-ublksrv_tgt.Tpo .deps/ublk-ublksrv_tgt.Po
g++ -DHAVE_CONFIG_H -I. -I./include -fcoroutines -std=c++20 -I/root/work/liburing-liburing-2.2/src/include -MT ublk-tgt_null.o -MD -MP -MF .deps/ublk-tgt_null.Tpo -c -o ublk-tgt_null.o test -f 'tgt_null.cpp' || echo './'tgt_null.cpp
mv -f .deps/ublk-tgt_null.Tpo .deps/ublk-tgt_null.Po
g++ -DHAVE_CONFIG_H -I. -I./include -fcoroutines -std=c++20 -I/root/work/liburing-liburing-2.2/src/include -MT ublk-tgt_loop.o -MD -MP -MF .deps/ublk-tgt_loop.Tpo -c -o ublk-tgt_loop.o test -f 'tgt_loop.cpp' || echo './'tgt_loop.cpp
mv -f .deps/ublk-tgt_loop.Tpo .deps/ublk-tgt_loop.Po
/bin/sh ./libtool --tag=CXX --mode=link g++ -fcoroutines -std=c++20 -I/root/work/liburing-liburing-2.2/src/include -L/root/work/liburing-liburing-2.2/src -o ublk ublk-ublksrv_tgt.o ublk-tgt_null.o ublk-tgt_loop.o lib/libublksrv.la -L/usr/lib -luring
libtool: link: g++ -fcoroutines -std=c++20 -I/root/work/liburing-liburing-2.2/src/include -o .libs/ublk ublk-ublksrv_tgt.o ublk-tgt_null.o ublk-tgt_loop.o -L/root/work/liburing-liburing-2.2/src lib/.libs/libublksrv.so -L/usr/lib -luring -Wl,-rpath -Wl,/usr/local/lib
/usr/bin/ld: ublk-ublksrv_tgt.o: in function ublksrv_drain_fetch_commands(ublksrv_dev*, ublksrv_queue_info*)': ublksrv_tgt.cpp:(.text+0x85e): undefined reference to pthread_join'
/usr/bin/ld: ublk-ublksrv_tgt.o: in function ublksrv_io_handler(void*)': ublksrv_tgt.cpp:(.text+0x9f8): undefined reference to pthread_create'
/usr/bin/ld: lib/.libs/libublksrv.so: undefined reference to `pthread_setaffinity_np'
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:545: ublk] Error 1
make[2]: Leaving directory '/root/work/ubdsrv'
make[1]: *** [Makefile:693: all-recursive] Error 1
make[1]: Leaving directory '/root/work/ubdsrv'
make: *** [Makefile:431: all] Error 2

[old-memories]

I find m4/ax_pthread.m4 is missing, so I add one here copied from http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_pthread.m4

This works.

[ming1]

You need to install the package of autoconf-archive

[ming1]

I have documented the build dependency in README, so close it now.