. ./redoconf.rc
rc_include rc/CC.rc rc/pkg-config.rc

prog='
#include <math.h>
int x = FP_NORMAL;
volatile float y;
void f() { y = sin(y); }
'

rc_pkg_detect LIBM libm \
	rc_compile cc link "$prog"
if [ -z "$HAVE_LIBM" ]; then
	rc_undo
	rc_replaceln HAVE_LIBM 1
	rc_appendln LIBM "-lm"
	appendln LIBS "$LIBM"
	if ! rc_compile cc link "$prog"; then
		rc_undo
		rc_replaceln HAVE_LIBM ""
		rc_replaceln LIBM ""
	fi
fi
	
rc_save