+ have_ptw_semaphore = conf.check_cc(fragment = '''
+#include <pthread.h>
+#include <semaphore.h>
+int main () { return 0; }
+''',
+ features = 'c',
+ mandatory = False,
+ execute = False,
+ msg = 'Checking for pthread posix semaphore',
+ okmsg = 'Found',
+ errmsg = 'Not found, falling back to Windows Semaphore.')
+
+ #if have_ptw_semaphore:
+ # conf.define('USE_PTW32_SEMAPHORE', 1)
+ # conf.env.append_value('CFLAGS', '-DUSE_PTW32_SEMAPHORE')
+ # conf.env.append_value('CXXFLAGS', '-DUSE_PTW32_SEMAPHORE')
+