+ if conf.env.TARGET_LINUX:
+ conf.check_cxx(fragment="""
+ #include <wx/glcanvas.h>
+ #include <GL/glu.h>
+ #include <GL/glext.h>
+ #include <GL/glxext.h>
+ int main() {
+ glXSwapIntervalEXT (0, 0, 1);
+ return 0;
+ }
+ """,
+ msg='Checking for glXSwapIntervalEXT',
+ okmsg='yes',
+ uselib='GL WXWIDGETS',
+ define_name='DCPOMATIC_HAVE_GLX_SWAP_INTERVAL_EXT',
+ mandatory=False)