cmake HAVE_VALID_TGMATH_H examples

glKarin/com.n0n3m4.diii4a Q3E/src/main/jni/xash3d/hlsdk-portable/CMakeLists.txt :200 

check_c_source_compiles("#include <tgmath.h>
	const float val = 2, val2 = 3;
	int main(){ return (int)(-asin(val) + cos(val2)); }" HAVE_VALID_TGMATH_H )