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Use CheckForPthreads.cxx to find pthreads library on Ubuntu.

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This commit is contained in:
Andreas Schuh 2014-03-17 12:35:28 +00:00
parent 6e4c22e982
commit c5627a75bc
3 changed files with 40 additions and 2 deletions
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2
CMakeLists.txt
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@ -15,7 +15,7 @@ set (PACKAGE_STRING "${PROJECT_NAME} ${PACKAGE_VERSION}")
set (PACKAGE_TARNAME "${PROJECT_NAME}-${PACKAGE_VERSION}")
set (PACKAGE_BUGREPORT "https://code.google.com/p/gflags/issues/")
project (${PROJECT_NAME} CXX C)
project (${PROJECT_NAME} CXX)
version_numbers (
${PACKAGE_VERSION}

38
cmake/CheckForPthreads.cxx Normal file
View file

@ -0,0 +1,38 @@
#include <stdio.h>
#include <pthread.h>
#include <unistd.h>
void* runner(void*);
int res = 0;
#ifdef __CLASSIC_C__
int main(){
int ac;
char*av[];
#else
int main(int ac, char*av[]){
#endif
pthread_t tid[2];
pthread_create(&tid[0], 0, runner, (void*)1);
pthread_create(&tid[1], 0, runner, (void*)2);
#if defined(__BEOS__) && !defined(__ZETA__) // (no usleep on BeOS 5.)
usleep(1); // for strange behavior on single-processor sun
#endif
pthread_join(tid[0], 0);
pthread_join(tid[1], 0);
if(ac > 1000){return *av[0];}
return res;
}
void* runner(void* args)
{
int cc;
for ( cc = 0; cc < 10; cc ++ )
{
printf("%d CC: %d\n", (int)args, cc);
}
res ++;
return 0;
}

2
cmake/FindThreadsCxx.cmake
View file

@ -100,7 +100,7 @@ else()
message(STATUS "Check if compiler accepts -pthread")
try_run(THREADS_PTHREAD_ARG THREADS_HAVE_PTHREAD_ARG
${CMAKE_BINARY_DIR}
${CMAKE_ROOT}/Modules/CheckForPthreads.c
${CMAKE_ROOT}/Modules/CheckForPthreads.cxx
CMAKE_FLAGS -DLINK_LIBRARIES:STRING=-pthread
COMPILE_OUTPUT_VARIABLE OUTPUT)