These are often, contrary to standards, implemented only as macros
or compiler-builtin functions without an actual symbol definition.
Originally committed as revision 21734 to svn://svn.ffmpeg.org/ffmpeg/trunk
EOF
}
+check_mathfunc(){
+ log check_func "$@"
+ func=$1
+ shift
+ disable $func
+ check_ld "$@" <<EOF && enable $func
+#include <math.h>
+int main(void){ $func(0); return 0; }
+EOF
+}
+
check_func_headers(){
log check_func_headers "$@"
headers=$1
check_lib math.h sin -lm
check_lib va/va.h vaInitialize -lva
-check_func exp2
-check_func exp2f
-check_func llrint
-check_func log2
-check_func log2f
-check_func lrint
-check_func lrintf
-check_func round
-check_func roundf
-check_func truncf
+check_mathfunc exp2
+check_mathfunc exp2f
+check_mathfunc llrint
+check_mathfunc log2
+check_mathfunc log2f
+check_mathfunc lrint
+check_mathfunc lrintf
+check_mathfunc round
+check_mathfunc roundf
+check_mathfunc truncf
# these are off by default, so fail if requested and not available
enabled avisynth && require2 vfw32 "windows.h vfw.h" AVIFileInit -lavifil32