TechQA.

How can I let CMake find an external package?

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I tried to build Qv2ray with CMake and Visual Studio on Windows and got the error:

CMake Error at cmake/backend.cmake:9 (message):
  gRPC Not Found
Call Stack (most recent call first):
  CMakeLists.txt:257 (include)

Check backend.cmake:

find_program(GRPC_CPP_PLUGIN grpc_cpp_plugin)

find_package(gRPC CONFIG QUIET)

# Debian, for example, cannot find gRPC in a proper way.
# This is used as a fallback searching method
if(NOT gRPC_FOUND)
    if(WIN32)
        message(FATAL_ERROR "gRPC Not Found")
    else()
    ......

I've built gRPC and installed it to C:\gRPC. How can I let CMake find it? If I add

SET(gRPC_DIR "C:/gRPC/lib/cmake/grpc")

before find_package, I got this error:

-- Could NOT find absl (missing: absl_DIR)
CMake Error at cmake/backend.cmake:9 (message):
  gRPC Not Found
Call Stack (most recent call first):
  CMakeLists.txt:257 (include)

If I also set absl_DIR, I got another error:

    Performing C SOURCE FILE Test UV_LINT_NO_UNUSED_PARAMETER failed with the following output:
Change Dir: C:/v2ray/qv2ray/build/CMakeFiles/CMakeScratch/TryCompile-ixqh17

Run Build Command(s):C:/ninja/ninja.exe cmTC_cc832 && [1/2] Building C object CMakeFiles\cmTC_cc832.dir\src.c.obj
FAILED: CMakeFiles/cmTC_cc832.dir/src.c.obj 
"C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\cl.exe"  /nologo -DUV_LINT_NO_UNUSED_PARAMETER  /DWIN32 /D_WINDOWS /W3  /MDd /Zi /Ob0 /Od /RTC1   -Wno-unused-parameter /showIncludes /FoCMakeFiles\cmTC_cc832.dir\src.c.obj /FdCMakeFiles\cmTC_cc832.dir\ /FS -c C:\v2ray\qv2ray\build\CMakeFiles\CMakeScratch\TryCompile-ixqh17\src.c
cl : Command line error D8021 : invalid numeric argument '/Wno-unused-parameter'

ninja: build stopped: subcommand failed.



Source file was:
int main(void) { return 0; }

Performing C SOURCE FILE Test UV_LINT_STRICT_PROTOTYPES failed with the following output:
Change Dir: C:/v2ray/qv2ray/build/CMakeFiles/CMakeScratch/TryCompile-ckl2px

Run Build Command(s):C:/ninja/ninja.exe cmTC_54f78 && [1/2] Building C object CMakeFiles\cmTC_54f78.dir\src.c.obj
FAILED: CMakeFiles/cmTC_54f78.dir/src.c.obj 
"C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\cl.exe"  /nologo -DUV_LINT_STRICT_PROTOTYPES  /DWIN32 /D_WINDOWS /W3  /MDd /Zi /Ob0 /Od /RTC1   -Wstrict-prototypes /showIncludes /FoCMakeFiles\cmTC_54f78.dir\src.c.obj /FdCMakeFiles\cmTC_54f78.dir\ /FS -c C:\v2ray\qv2ray\build\CMakeFiles\CMakeScratch\TryCompile-ckl2px\src.c
cl : Command line error D8021 : invalid numeric argument '/Wstrict-prototypes'

ninja: build stopped: subcommand failed.



Source file was:
int main(void) { return 0; }

Performing C SOURCE FILE Test UV_LINT_EXTRA failed with the following output:
Change Dir: C:/v2ray/qv2ray/build/CMakeFiles/CMakeScratch/TryCompile-oz29mu

Run Build Command(s):C:/ninja/ninja.exe cmTC_c075b && [1/2] Building C object CMakeFiles\cmTC_c075b.dir\src.c.obj
FAILED: CMakeFiles/cmTC_c075b.dir/src.c.obj 
"C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\cl.exe"  /nologo -DUV_LINT_EXTRA  /DWIN32 /D_WINDOWS /W3  /MDd /Zi /Ob0 /Od /RTC1   -Wextra /showIncludes /FoCMakeFiles\cmTC_c075b.dir\src.c.obj /FdCMakeFiles\cmTC_c075b.dir\ /FS -c C:\v2ray\qv2ray\build\CMakeFiles\CMakeScratch\TryCompile-oz29mu\src.c
cl : Command line error D8021 : invalid numeric argument '/Wextra'

ninja: build stopped: subcommand failed.



Source file was:
int main(void) { return 0; }

Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:
Change Dir: C:/v2ray/qv2ray/build/CMakeFiles/CMakeScratch/TryCompile-d5iufb

Run Build Command(s):C:/ninja/ninja.exe cmTC_b1e72 && [1/2] Building C object CMakeFiles\cmTC_b1e72.dir\src.c.obj
FAILED: CMakeFiles/cmTC_b1e72.dir/src.c.obj 
"C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\cl.exe"  /nologo -DCMAKE_HAVE_LIBC_PTHREAD  /DWIN32 /D_WINDOWS /W3  /MDd /Zi /Ob0 /Od /RTC1 /showIncludes /FoCMakeFiles\cmTC_b1e72.dir\src.c.obj /FdCMakeFiles\cmTC_b1e72.dir\ /FS -c C:\v2ray\qv2ray\build\CMakeFiles\CMakeScratch\TryCompile-d5iufb\src.c
C:\v2ray\qv2ray\build\CMakeFiles\CMakeScratch\TryCompile-d5iufb\src.c(1): fatal error C1083: Cannot open include file: 'pthread.h': No such file or directory

ninja: build stopped: subcommand failed.



Source file was:
#include <pthread.h>

static void* test_func(void* data)
{
  return data;
}

int main(void)
{
  pthread_t thread;
  pthread_create(&thread, NULL, test_func, NULL);
  pthread_detach(thread);
  pthread_cancel(thread);
  pthread_join(thread, NULL);
  pthread_atfork(NULL, NULL, NULL);
  pthread_exit(NULL);

  return 0;
}


Determining if the function pthread_create exists in the pthreads failed with the following output:
Change Dir: C:/v2ray/qv2ray/build/CMakeFiles/CMakeScratch/TryCompile-cyjamz

Run Build Command(s):C:/ninja/ninja.exe cmTC_863f5 && [1/2] Building C object CMakeFiles\cmTC_863f5.dir\CheckFunctionExists.c.obj

[2/2] Linking C executable cmTC_863f5.exe

FAILED: cmTC_863f5.exe 

cmd.exe /C "cd . && C:\CMake\bin\cmake.exe -E vs_link_exe --intdir=CMakeFiles\cmTC_863f5.dir --rc=C:\PROGRA~2\WI3CF2~1\10\bin\100220~1.0\x64\rc.exe --mt=C:\PROGRA~2\WI3CF2~1\10\bin\100220~1.0\x64\mt.exe --manifests  -- "C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\link.exe" /nologo CMakeFiles\cmTC_863f5.dir\CheckFunctionExists.c.obj  /out:cmTC_863f5.exe /implib:cmTC_863f5.lib /pdb:cmTC_863f5.pdb /version:0.0 /machine:x64  /debug /INCREMENTAL /subsystem:console  pthreads.lib  kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib && cd ."
LINK Pass 1: command "C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\link.exe /nologo CMakeFiles\cmTC_863f5.dir\CheckFunctionExists.c.obj /out:cmTC_863f5.exe /implib:cmTC_863f5.lib /pdb:cmTC_863f5.pdb /version:0.0 /machine:x64 /debug /INCREMENTAL /subsystem:console pthreads.lib kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib /MANIFEST /MANIFESTFILE:CMakeFiles\cmTC_863f5.dir/intermediate.manifest CMakeFiles\cmTC_863f5.dir/manifest.res" failed (exit code 1104) with the following output:

LINK : fatal error LNK1104: cannot open file 'pthreads.lib'


ninja: build stopped: subcommand failed.




Determining if the function pthread_create exists in the pthread failed with the following output:
Change Dir: C:/v2ray/qv2ray/build/CMakeFiles/CMakeScratch/TryCompile-ymkre8

Run Build Command(s):C:/ninja/ninja.exe cmTC_2ac36 && [1/2] Building C object CMakeFiles\cmTC_2ac36.dir\CheckFunctionExists.c.obj

[2/2] Linking C executable cmTC_2ac36.exe

FAILED: cmTC_2ac36.exe 

cmd.exe /C "cd . && C:\CMake\bin\cmake.exe -E vs_link_exe --intdir=CMakeFiles\cmTC_2ac36.dir --rc=C:\PROGRA~2\WI3CF2~1\10\bin\100220~1.0\x64\rc.exe --mt=C:\PROGRA~2\WI3CF2~1\10\bin\100220~1.0\x64\mt.exe --manifests  -- "C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\link.exe" /nologo CMakeFiles\cmTC_2ac36.dir\CheckFunctionExists.c.obj  /out:cmTC_2ac36.exe /implib:cmTC_2ac36.lib /pdb:cmTC_2ac36.pdb /version:0.0 /machine:x64  /debug /INCREMENTAL /subsystem:console  pthread.lib  kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib && cd ."
LINK Pass 1: command "C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\link.exe /nologo CMakeFiles\cmTC_2ac36.dir\CheckFunctionExists.c.obj /out:cmTC_2ac36.exe /implib:cmTC_2ac36.lib /pdb:cmTC_2ac36.pdb /version:0.0 /machine:x64 /debug /INCREMENTAL /subsystem:console pthread.lib kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib /MANIFEST /MANIFESTFILE:CMakeFiles\cmTC_2ac36.dir/intermediate.manifest CMakeFiles\cmTC_2ac36.dir/manifest.res" failed (exit code 1104) with the following output:

LINK : fatal error LNK1104: cannot open file 'pthread.lib'


ninja: build stopped: subcommand failed.

I downloaded pthread-win32, copied pthreadVC2.lib to pthread.lib and added the following line to CMakeLists.txt,

    set (CMAKE_EXE_LINKER_FLAGS  "/LIBPATH:\"C:\\pthreads-w32-2-9-1-release\\Pre-built.2\\lib\\x64\\\"")

then rebuilt but still got the error:

Performing C SOURCE FILE Test UV_LINT_NO_UNUSED_PARAMETER failed with the following output:
Change Dir: C:/v2ray/qv2ray/build/CMakeFiles/CMakeScratch/TryCompile-wqbrhl

Run Build Command(s):C:/ninja/ninja.exe cmTC_7b6af && [1/2] Building C object CMakeFiles\cmTC_7b6af.dir\src.c.obj
FAILED: CMakeFiles/cmTC_7b6af.dir/src.c.obj 
"C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\cl.exe"  /nologo -DUV_LINT_NO_UNUSED_PARAMETER  /DWIN32 /D_WINDOWS /W3  /MDd /Zi /Ob0 /Od /RTC1   -Wno-unused-parameter /showIncludes /FoCMakeFiles\cmTC_7b6af.dir\src.c.obj /FdCMakeFiles\cmTC_7b6af.dir\ /FS -c C:\v2ray\qv2ray\build\CMakeFiles\CMakeScratch\TryCompile-wqbrhl\src.c
cl : Command line error D8021 : invalid numeric argument '/Wno-unused-parameter'

ninja: build stopped: subcommand failed.



Source file was:
int main(void) { return 0; }

Performing C SOURCE FILE Test UV_LINT_STRICT_PROTOTYPES failed with the following output:
Change Dir: C:/v2ray/qv2ray/build/CMakeFiles/CMakeScratch/TryCompile-e8xc9e

Run Build Command(s):C:/ninja/ninja.exe cmTC_f19a7 && [1/2] Building C object CMakeFiles\cmTC_f19a7.dir\src.c.obj
FAILED: CMakeFiles/cmTC_f19a7.dir/src.c.obj 
"C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\cl.exe"  /nologo -DUV_LINT_STRICT_PROTOTYPES  /DWIN32 /D_WINDOWS /W3  /MDd /Zi /Ob0 /Od /RTC1   -Wstrict-prototypes /showIncludes /FoCMakeFiles\cmTC_f19a7.dir\src.c.obj /FdCMakeFiles\cmTC_f19a7.dir\ /FS -c C:\v2ray\qv2ray\build\CMakeFiles\CMakeScratch\TryCompile-e8xc9e\src.c
cl : Command line error D8021 : invalid numeric argument '/Wstrict-prototypes'

ninja: build stopped: subcommand failed.



Source file was:
int main(void) { return 0; }

Performing C SOURCE FILE Test UV_LINT_EXTRA failed with the following output:
Change Dir: C:/v2ray/qv2ray/build/CMakeFiles/CMakeScratch/TryCompile-0dci1s

Run Build Command(s):C:/ninja/ninja.exe cmTC_33837 && [1/2] Building C object CMakeFiles\cmTC_33837.dir\src.c.obj
FAILED: CMakeFiles/cmTC_33837.dir/src.c.obj 
"C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\cl.exe"  /nologo -DUV_LINT_EXTRA  /DWIN32 /D_WINDOWS /W3  /MDd /Zi /Ob0 /Od /RTC1   -Wextra /showIncludes /FoCMakeFiles\cmTC_33837.dir\src.c.obj /FdCMakeFiles\cmTC_33837.dir\ /FS -c C:\v2ray\qv2ray\build\CMakeFiles\CMakeScratch\TryCompile-0dci1s\src.c
cl : Command line error D8021 : invalid numeric argument '/Wextra'

ninja: build stopped: subcommand failed.



Source file was:
int main(void) { return 0; }

Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:
Change Dir: C:/v2ray/qv2ray/build/CMakeFiles/CMakeScratch/TryCompile-fxbu04

Run Build Command(s):C:/ninja/ninja.exe cmTC_79d11 && [1/2] Building C object CMakeFiles\cmTC_79d11.dir\src.c.obj
FAILED: CMakeFiles/cmTC_79d11.dir/src.c.obj 
"C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\cl.exe"  /nologo -DCMAKE_HAVE_LIBC_PTHREAD  /DWIN32 /D_WINDOWS /W3  /MDd /Zi /Ob0 /Od /RTC1 /showIncludes /FoCMakeFiles\cmTC_79d11.dir\src.c.obj /FdCMakeFiles\cmTC_79d11.dir\ /FS -c C:\v2ray\qv2ray\build\CMakeFiles\CMakeScratch\TryCompile-fxbu04\src.c
C:\v2ray\qv2ray\build\CMakeFiles\CMakeScratch\TryCompile-fxbu04\src.c(1): fatal error C1083: Cannot open include file: 'pthread.h': No such file or directory

ninja: build stopped: subcommand failed.



Source file was:
#include <pthread.h>

static void* test_func(void* data)
{
  return data;
}

int main(void)
{
  pthread_t thread;
  pthread_create(&thread, NULL, test_func, NULL);
  pthread_detach(thread);
  pthread_cancel(thread);
  pthread_join(thread, NULL);
  pthread_atfork(NULL, NULL, NULL);
  pthread_exit(NULL);

  return 0;
}


Determining if the function pthread_create exists in the pthreads failed with the following output:
Change Dir: C:/v2ray/qv2ray/build/CMakeFiles/CMakeScratch/TryCompile-nnzju3

Run Build Command(s):C:/ninja/ninja.exe cmTC_1b1f1 && [1/2] Building C object CMakeFiles\cmTC_1b1f1.dir\CheckFunctionExists.c.obj

[2/2] Linking C executable cmTC_1b1f1.exe

FAILED: cmTC_1b1f1.exe 

cmd.exe /C "cd . && C:\CMake\bin\cmake.exe -E vs_link_exe --intdir=CMakeFiles\cmTC_1b1f1.dir --rc=C:\PROGRA~2\WI3CF2~1\10\bin\100220~1.0\x64\rc.exe --mt=C:\PROGRA~2\WI3CF2~1\10\bin\100220~1.0\x64\mt.exe --manifests  -- "C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\link.exe" /nologo CMakeFiles\cmTC_1b1f1.dir\CheckFunctionExists.c.obj  /out:cmTC_1b1f1.exe /implib:cmTC_1b1f1.lib /pdb:cmTC_1b1f1.pdb /version:0.0 /LIBPATH:"C:\pthreads-w32-2-9-1-release\Pre-built.2\lib\x64\"  /debug /INCREMENTAL /subsystem:console  pthreads.lib  kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib && cd ."
LINK: command "C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\link.exe /nologo CMakeFiles\cmTC_1b1f1.dir\CheckFunctionExists.c.obj /out:cmTC_1b1f1.exe /implib:cmTC_1b1f1.lib /pdb:cmTC_1b1f1.pdb /version:0.0 /LIBPATH:C:\pthreads-w32-2-9-1-release\Pre-built.2\lib\x64"  /debug /INCREMENTAL /subsystem:console  pthreads.lib  kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib  /MANIFEST /MANIFESTFILE:cmTC_1b1f1.exe.manifest" failed (exit code 1120) with the following output:
CheckFunctionExists.c.obj : error LNK2019: unresolved external symbol pthread_create referenced in function main


cmTC_1b1f1.exe : fatal error LNK1120: 1 unresolved externals


ninja: build stopped: subcommand failed.




Determining if the function pthread_create exists in the pthread failed with the following output:
Change Dir: C:/v2ray/qv2ray/build/CMakeFiles/CMakeScratch/TryCompile-4uqkdk

Run Build Command(s):C:/ninja/ninja.exe cmTC_12c03 && [1/2] Building C object CMakeFiles\cmTC_12c03.dir\CheckFunctionExists.c.obj

[2/2] Linking C executable cmTC_12c03.exe

FAILED: cmTC_12c03.exe 

cmd.exe /C "cd . && C:\CMake\bin\cmake.exe -E vs_link_exe --intdir=CMakeFiles\cmTC_12c03.dir --rc=C:\PROGRA~2\WI3CF2~1\10\bin\100220~1.0\x64\rc.exe --mt=C:\PROGRA~2\WI3CF2~1\10\bin\100220~1.0\x64\mt.exe --manifests  -- "C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\link.exe" /nologo CMakeFiles\cmTC_12c03.dir\CheckFunctionExists.c.obj  /out:cmTC_12c03.exe /implib:cmTC_12c03.lib /pdb:cmTC_12c03.pdb /version:0.0 /LIBPATH:"C:\pthreads-w32-2-9-1-release\Pre-built.2\lib\x64\"  /debug /INCREMENTAL /subsystem:console  pthread.lib  kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib && cd ."
LINK: command "C:\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.34.31933\bin\Hostx64\x64\link.exe /nologo CMakeFiles\cmTC_12c03.dir\CheckFunctionExists.c.obj /out:cmTC_12c03.exe /implib:cmTC_12c03.lib /pdb:cmTC_12c03.pdb /version:0.0 /LIBPATH:C:\pthreads-w32-2-9-1-release\Pre-built.2\lib\x64"  /debug /INCREMENTAL /subsystem:console  pthread.lib  kernel32.lib user32.lib gdi32.lib winspool.lib shell32.lib ole32.lib oleaut32.lib uuid.lib comdlg32.lib advapi32.lib  /MANIFEST /MANIFESTFILE:cmTC_12c03.exe.manifest" failed (exit code 1120) with the following output:
CheckFunctionExists.c.obj : error LNK2019: unresolved external symbol pthread_create referenced in function main


cmTC_12c03.exe : fatal error LNK1120: 1 unresolved externals


ninja: build stopped: subcommand failed.

The error messages in cmake build window are:

-- Found CURL: C:\curl-7.87.0-win64-mingw\lib (found version "7.87.0")
-- Found Protobuf: C:\protobuf-21.12\lib (found version "3.21.12")
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - not found
-- Found Threads: TRUE
CMake Error at cmake/backend.cmake:16 (message):
  gRPC Not Found
Call Stack (most recent call first):
  CMakeLists.txt:257 (include)


-- Configuring incomplete, errors occurred!
See also "C:/v2ray/qv2ray/build/CMakeFiles/CMakeOutput.log".
See also "C:/v2ray/qv2ray/build/CMakeFiles/CMakeError.log".

Probably, absl_DIR and pthread are both required by gRPC. But I don't think this is the correct way to let CMake find gRPC since I can run the executables in C:\gRPC\bin\ without problem so gRPC should be able to find the components it depends automatically. What is the correct way to let CMake find gRPC?

cmake pthreads grpc pthreads-win32
Original Q&A
0

There are 0 answers

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