ObjFW  Diff

		AC_CHECK_LIB(objc, objc_msgSend, [
			LIBS="-lobjc $LIBS"
		], [
			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"])
			tmp="-Xarch_x86_64 -Wl,-alias_list,mach_alias_list"
			AC_SUBST(MACH_ALIAS_LIST, $tmp)

AC_MSG_RESULT($fp_endianess)
AS_IF([test x"$fp_endianess" = x"unknown"], [
	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"
			AC_SUBST(ASPRINTF_M, "asprintf.m")
			ac_cv_snprintf_useful_ret="yes"