@@ -303,20 +303,20 @@
 		], [
 			AC_MSG_ERROR([libobjc not found!])
 		])
 		;;
 esac
+
+AC_CHECK_FUNC(objc_autoreleasePoolPush, [], [
+	AC_SUBST(AUTORELEASE_M, "autorelease.m")
+])
 
 AC_CHECK_FUNC(objc_enumerationMutation, [
 	AC_DEFINE(HAVE_OBJC_ENUMERATIONMUTATION, 1,
 		[Whether we have objc_enumerationMutation])
 ])
 
-AC_CHECK_FUNC(objc_autoreleasePoolPush, [], [
-	AC_SUBST(AUTORELEASE_M, "autorelease.m")
-])
-
 case "$host_os" in
 	darwin*)
 		AC_SUBST(LDFLAGS_REEXPORT, ["-Wl,-reexport-lobjfw"])
 		AS_IF([test x"$objc_runtime" = x"Apple runtime"], [
 			AC_SUBST(REEXPORT_LIBOBJC, ["-Wl,-reexport-lobjc"])
@@ -387,24 +387,10 @@
 	AC_MSG_ERROR(
 		[Floating point implementation does not conform to IEEE 754!])])
 
 AC_CHECK_LIB(m, fmod, LIBS="$LIBS -lm")
 
-AC_MSG_CHECKING(for M_PI)
-AC_EGREP_CPP(yes, [
-	#include <math.h>
-
-	#ifdef M_PI
-	yes
-	#endif
-], [
-	AC_MSG_RESULT(yes)
-], [
-	AC_MSG_RESULT(no)
-	AC_DEFINE(M_PI, 3.141592653589793238462643, [Precalculated Pi])
-])
-
 AC_CHECK_FUNC(asprintf, [
 	case "$host" in
 		*-psp-*)
 			dnl asprintf is broken on the PSP, but snprintf works.
 			have_asprintf="no"