Unable to find header files

[jamesgoodhouse]

I've worked through the README and when it comes time to run $ make I receive the error fatal error: 'fluent-bit/flb_info.h' file not found. I am setting -DFLB_SOURCE when calling cmake and it finishes without error. I feel like there's another piece of missing information to get things up and running.

[jamesgoodhouse]

It appears the issue is that on top of pointing to the source code with-DFLB_SOURCE, said source code also needs to be have cmake ran to build all the appropriate header files. I'm not sure the cleanest way to update to readme to reflect this.

[xocasdashdash]

I think I'm hitting a very similar error on macos, I'm trying to build the example project but I keep hitting this error:

/usr/local/Cellar/cmake/3.10.3/bin/cmake -H/Users/joaquin.fernandez/projects/personal/fluent-bit-plugin -B/Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/build --check-build-system CMakeFiles/Makefile.cmake 0
/usr/local/Cellar/cmake/3.10.3/bin/cmake -E cmake_progress_start /Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/build/CMakeFiles /Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/build/CMakeFiles/progress.marks
/Library/Developer/CommandLineTools/usr/bin/make -f CMakeFiles/Makefile2 all
/Library/Developer/CommandLineTools/usr/bin/make -f out_stdout2/CMakeFiles/flb-out_stdout2.dir/build.make out_stdout2/CMakeFiles/flb-out_stdout2.dir/depend
cd /Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/build && /usr/local/Cellar/cmake/3.10.3/bin/cmake -E cmake_depends "Unix Makefiles" /Users/joaquin.fernandez/projects/personal/fluent-bit-plugin /Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/out_stdout2 /Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/build /Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/build/out_stdout2 /Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/build/out_stdout2/CMakeFiles/flb-out_stdout2.dir/DependInfo.cmake --color=
Dependee "/Users/joaquin.fernandez/projects/personal/fluent-bit/include/fluent-bit/flb_info.h" is newer than depender "out_stdout2/CMakeFiles/flb-out_stdout2.dir/stdout2.c.o".
Clearing dependencies in "/Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/build/out_stdout2/CMakeFiles/flb-out_stdout2.dir/depend.make".
Scanning dependencies of target flb-out_stdout2
/Library/Developer/CommandLineTools/usr/bin/make -f out_stdout2/CMakeFiles/flb-out_stdout2.dir/build.make out_stdout2/CMakeFiles/flb-out_stdout2.dir/build
[ 50%] Building C object out_stdout2/CMakeFiles/flb-out_stdout2.dir/stdout2.c.o
cd /Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/build/out_stdout2 && /usr/bin/clang -Dflb_out_stdout2_EXPORTS -I/Users/joaquin.fernandez/projects/personal/fluent-bit/include -I/Users/joaquin.fernandez/projects/personal/fluent-bit/lib -I/Users/joaquin.fernandez/projects/personal/fluent-bit/lib/flb_libco -I/Users/joaquin.fernandez/projects/personal/fluent-bit/lib/rbtree -I/Users/joaquin.fernandez/projects/personal/fluent-bit/lib/msgpack-3.2.0/include -I/Users/joaquin.fernandez/projects/personal/fluent-bit/lib/chunkio/include -I/Users/joaquin.fernandez/projects/personal/fluent-bit/lib/LuaJIT-2.1.0-beta3/src -I/Users/joaquin.fernandez/projects/personal/fluent-bit/lib/monkey/include -I/Users/joaquin.fernandez/projects/personal/fluent-bit/lib/mbedtls-2.16.5/include -I/Users/joaquin.fernandez/projects/personal/fluent-bit/lib/sqlite-amalgamation-3310000 -I/Users/joaquin.fernandez/projects/personal/fluent-bit/lib/mpack-amalgamation-1.0/src -I/Users/joaquin.fernandez/projects/personal/fluent-bit/lib/miniz -I/Users/joaquin.fernandez/projects/personal/fluent-bit/lib/onigmo -I/Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/build/include  -g -fPIC   -o CMakeFiles/flb-out_stdout2.dir/stdout2.c.o   -c /Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/out_stdout2/stdout2.c
/Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/out_stdout2/stdout2.c:31:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
1 warning generated.
[100%] Linking C shared library ../flb-out_stdout2.dylib
cd /Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/build/out_stdout2 && /usr/local/Cellar/cmake/3.10.3/bin/cmake -E cmake_link_script CMakeFiles/flb-out_stdout2.dir/link.txt --verbose=1
/usr/bin/clang -g -dynamiclib -Wl,-headerpad_max_install_names  -o ../flb-out_stdout2.dylib -install_name /Users/joaquin.fernandez/projects/personal/fluent-bit-plugin/build/flb-out_stdout2.dylib CMakeFiles/flb-out_stdout2.dir/stdout2.c.o
Undefined symbols for architecture x86_64:
  "_co_switch", referenced from:
      _flb_output_return_do in stdout2.c.o
  "_flb_errno_print", referenced from:
      _flb_output_return in stdout2.c.o
  "_flb_pack_print", referenced from:
      _cb_stdout_flush in stdout2.c.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [flb-out_stdout2.dylib] Error 1
make[1]: *** [out_stdout2/CMakeFiles/flb-out_stdout2.dir/all] Error 2
make: *** [all] Error 2

I am able to build fluent-bit locally, but it seems that something is missing from the CMakeLists.txt so that cmake and clang can find the header files

[tcinbis]

Yeah, same here on windows. The linking part fails with:

LINK Pass 1: command "C:\PROGRA~2\MICROS~3\2019\BUILDT~1\VC\Tools\MSVC\1429~1.301\bin\Hostx64\x64\link.exe /nologo @CMakeFiles\flb-out_stdout2.dir\objects1.rsp /out:flb-out_stdout2.dll /implib:flb-out_stdout2.lib /pdb:C:\Users\wd977654\git-repos\fluent-bit-plugin\build\out_stdout2\flb-out_stdout2.pdb /dll /version:0.0 /machine:x64 /debug /INCREMENTAL kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib /MANIFEST /MANIFESTFILE:CMakeFiles\flb-out_stdout2.dir/intermediate.manifest CMakeFiles\flb-out_stdout2.dir/manifest.res" failed (exit code 1120) with the following output:
stdout2.c.obj : error LNK2019: unresolved external symbol __imp_send referenced in function flb_output_return
stdout2.c.obj : error LNK2019: unresolved external symbol flb_errno_print referenced in function flb_output_return
stdout2.c.obj : error LNK2019: unresolved external symbol co_switch referenced in function flb_coro_yield
stdout2.c.obj : error LNK2019: unresolved external symbol flb_coro_get referenced in function flb_output_return_do
stdout2.c.obj : error LNK2019: unresolved external symbol flb_output_thread_instance_get referenced in function flb_output_return
stdout2.c.obj : error LNK2019: unresolved external symbol flb_output_flush_prepare_destroy referenced in function flb_output_return
stdout2.c.obj : error LNK2019: unresolved external symbol flb_pack_print referenced in function flb_output_return_do
flb-out_stdout2.dll : fatal error LNK1120: 7 unresolved externals
NMAKE : fatal error U1077: '"C:\Program Files\CMake\bin\cmake.exe"' : return code '0xffffffff'

[UV-RogerChen]

Yeah, same here on windows. The linking part fails with:

LINK Pass 1: command "C:\PROGRA~2\MICROS~3\2019\BUILDT~1\VC\Tools\MSVC\1429~1.301\bin\Hostx64\x64\link.exe /nologo @CMakeFiles\flb-out_stdout2.dir\objects1.rsp /out:flb-out_stdout2.dll /implib:flb-out_stdout2.lib /pdb:C:\Users\wd977654\git-repos\fluent-bit-plugin\build\out_stdout2\flb-out_stdout2.pdb /dll /version:0.0 /machine:x64 /debug /INCREMENTAL kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib /MANIFEST /MANIFESTFILE:CMakeFiles\flb-out_stdout2.dir/intermediate.manifest CMakeFiles\flb-out_stdout2.dir/manifest.res" failed (exit code 1120) with the following output:
stdout2.c.obj : error LNK2019: unresolved external symbol __imp_send referenced in function flb_output_return
stdout2.c.obj : error LNK2019: unresolved external symbol flb_errno_print referenced in function flb_output_return
stdout2.c.obj : error LNK2019: unresolved external symbol co_switch referenced in function flb_coro_yield
stdout2.c.obj : error LNK2019: unresolved external symbol flb_coro_get referenced in function flb_output_return_do
stdout2.c.obj : error LNK2019: unresolved external symbol flb_output_thread_instance_get referenced in function flb_output_return
stdout2.c.obj : error LNK2019: unresolved external symbol flb_output_flush_prepare_destroy referenced in function flb_output_return
stdout2.c.obj : error LNK2019: unresolved external symbol flb_pack_print referenced in function flb_output_return_do
flb-out_stdout2.dll : fatal error LNK1120: 7 unresolved externals
NMAKE : fatal error U1077: '"C:\Program Files\CMake\bin\cmake.exe"' : return code '0xffffffff'

Yeah, same here on windows. The linking part fails with:

LINK Pass 1: command "C:\PROGRA~2\MICROS~3\2019\BUILDT~1\VC\Tools\MSVC\1429~1.301\bin\Hostx64\x64\link.exe /nologo @CMakeFiles\flb-out_stdout2.dir\objects1.rsp /out:flb-out_stdout2.dll /implib:flb-out_stdout2.lib /pdb:C:\Users\wd977654\git-repos\fluent-bit-plugin\build\out_stdout2\flb-out_stdout2.pdb /dll /version:0.0 /machine:x64 /debug /INCREMENTAL kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib /MANIFEST /MANIFESTFILE:CMakeFiles\flb-out_stdout2.dir/intermediate.manifest CMakeFiles\flb-out_stdout2.dir/manifest.res" failed (exit code 1120) with the following output:
stdout2.c.obj : error LNK2019: unresolved external symbol __imp_send referenced in function flb_output_return
stdout2.c.obj : error LNK2019: unresolved external symbol flb_errno_print referenced in function flb_output_return
stdout2.c.obj : error LNK2019: unresolved external symbol co_switch referenced in function flb_coro_yield
stdout2.c.obj : error LNK2019: unresolved external symbol flb_coro_get referenced in function flb_output_return_do
stdout2.c.obj : error LNK2019: unresolved external symbol flb_output_thread_instance_get referenced in function flb_output_return
stdout2.c.obj : error LNK2019: unresolved external symbol flb_output_flush_prepare_destroy referenced in function flb_output_return
stdout2.c.obj : error LNK2019: unresolved external symbol flb_pack_print referenced in function flb_output_return_do
flb-out_stdout2.dll : fatal error LNK1120: 7 unresolved externals
NMAKE : fatal error U1077: '"C:\Program Files\CMake\bin\cmake.exe"' : return code '0xffffffff'

Hi @tcinbis Wondering if you have this issue resolved and how? I am working on building the same plugin for Windows and encounter same linker issue. I found similar issue reported in fluent-bit, but no solution provided. fluent/fluent-bit#6195. Would like to know how do you resolve it. Can you give me some suggestions please?
Thanks