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Force GCC linker to see that we need pthread to work around nvidia driver bug.

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Sometimes the compiler/linker notices that the workaround static function was
never reached and optimizes the function away. To workaround this issue we
explicitly call the function when ESC is pressed.
This commit is contained in:
Robert Maynard 2016-03-21 09:04:46 -04:00
parent d91424ce1c
commit cc48916432
1 changed files with 4 additions and 6 deletions
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10
vtkm/opengl/testing/TestingWindow.h
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@ -68,6 +68,7 @@
// So that is the explanation on why we have the following function which is
// never used and seems very crazy.
#include <pthread.h>
#include <iostream>
#define VTKM_NVIDIA_PTHREAD_WORKAROUND 1
static int vtkm_force_linking_to_pthread_to_fix_nvidia_libgl_bug()
{ return static_cast<int>(pthread_self()); }
@ -86,12 +87,6 @@ namespace testing{
///
class TestingWindow : public vtkm::opengl::testing::WindowBase<TestingWindow>
{
#if defined(VTKM_NVIDIA_PTHREAD_WORKAROUND)
VTKM_CONT_EXPORT int vtkm_force_linking_to_pthread_to_fix_nvidia_libgl_bug()
{ return ::vtkm_force_linking_to_pthread_to_fix_nvidia_libgl_bug(); }
#endif
public:
VTKM_CONT_EXPORT TestingWindow(){};
@ -113,6 +108,9 @@ public:
{
if(key == 27) //escape pressed
{
#if defined(VTKM_NVIDIA_PTHREAD_WORKAROUND)
std::cout << ::vtkm_force_linking_to_pthread_to_fix_nvidia_libgl_bug();
#endif
exit(0);
}
}