I am seeing a pthread error while running cmake to configure the build
Has anyone else seen this ?
```
Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the
following output:
Change Dir: /home/nyue/projects/OpenImageIO/
2.3.19.0/build/CMakeFiles/CMakeTmp
Run Build Command(s):/usr/bin/ninja cmTC_0810d && [1/2] Building C object
CMakeFiles/cmTC_0810d.dir/src.c.o
[2/2] Linking C executable cmTC_0810d
FAILED: cmTC_0810d
: && /usr/bin/cc CMakeFiles/cmTC_0810d.dir/src.c.o -o cmTC_0810d && :
/usr/bin/ld: CMakeFiles/cmTC_0810d.dir/src.c.o: in function `main':
src.c:(.text+0x46): undefined reference to `pthread_create'
/usr/bin/ld: src.c:(.text+0x52): undefined reference to `pthread_detach'
/usr/bin/ld: src.c:(.text+0x5e): undefined reference to `pthread_cancel'
/usr/bin/ld: src.c:(.text+0x6f): undefined reference to `pthread_join'
collect2: error: ld returned 1 exit status
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: /home/nyue/projects/OpenImageIO/
2.3.19.0/build/CMakeFiles/CMakeTmp
Run Build Command(s):/usr/bin/ninja cmTC_589eb && [1/2] Building C object
CMakeFiles/cmTC_589eb.dir/CheckFunctionExists.c.o
[2/2] Linking C executable cmTC_589eb
FAILED: cmTC_589eb
: && /usr/bin/cc -DCHECK_FUNCTION_EXISTS=pthread_create
CMakeFiles/cmTC_589eb.dir/CheckFunctionExists.c.o -o cmTC_589eb
-lpthreads && :
/usr/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
```
My cmake command is as follow
```
#!/bin/sh
rm -f CMakeCache.txt
cmake -Wno-dev \
-D BUILD_MISSING_DEPS=ON \
-D CLANG_FORMAT_EXE=$HOME/systems/llvm/14.0.6/bin/clang-format \
-D BUILD_TESTING=OFF \
-D USE_PYTHON=OFF \
-D USE_QT=ON \
-D BUILD_SHARED_LIBS=OFF \
-D Boost_ROOT=$HOME/systems/boost/1.80.0 \
-D OpenEXR_ROOT=$HOME/systems/openexr/3.1.5 \
-D Imath_DIR=$HOME/systems/imath/3.1.5/lib/cmake/Imath \
-D CMAKE_BUILD_TYPE=Release \
-D CMAKE_INSTALL_PREFIX=$HOME/systems/oiio/2.3.19.0 \
-G "Ninja" \
../oiio-2.3.19.0
```
Cheers
--
Nicholas Yue
https://www.linkedin.com/in/nicholasyue/
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