Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -1,7 +1,9 @@
 AC_INIT(ObjGameKit, 0.1, js@webkeks.org)
 AC_CONFIG_SRCDIR(src)
+
+AC_CANONICAL_HOST
 
 AC_CHECK_TOOL(OBJFW_CONFIG, objfw-config)
 AS_IF([test x"$OBJFW_CONFIG" = x""], [
 	AC_MSG_ERROR(You need ObjFW and objfw-config installed!)
 ])
@@ -41,10 +43,16 @@
 	CPPFLAGS="$CPPFLAGS $allegro5_CFLAGS"
 	LIBS="$LIBS $allegro5_LIBS"
 ], [
 	AC_MSG_ERROR(You need allegro{_main,_image}-5.0 installed!)
 ])
+
+case "$host_os" in
+	darwin*)
+		AC_SUBST(REEXPORT_ALLEGRO, ["-Wl,-reexport-lallegro_main"])
+		;;
+esac
 
 # We add -Werror after all tests in case some tests emit warnings
 OBJCFLAGS="$OBJCFLAGS -Werror"
 
 BUILDSYS_SHARED_LIB
@@ -55,7 +63,7 @@
 dnl and add OBJCPPFLAGS to CPPFLAGS, thus we need to AC_SUBST these ourself.
 AC_SUBST(CPP)
 AC_SUBST(CPPFLAGS)
 
 AC_SUBST(PACKAGE, ObjGameKit)
-AC_CONFIG_FILES(buildsys.mk)
+AC_CONFIG_FILES([buildsys.mk extra.mk])
 AC_OUTPUT

ADDED   extra.mk.in
Index: extra.mk.in
==================================================================
--- extra.mk.in
+++ extra.mk.in
@@ -0,0 +1,1 @@
+REEXPORT_ALLEGRO = @REEXPORT_ALLEGRO@

Index: src/Makefile
==================================================================
--- src/Makefile
+++ src/Makefile
@@ -9,8 +9,10 @@
 
 INCLUDES = ${SRCS:.m=.h}	\
 	   ObjGameKit.h
 
 include ../buildsys.mk
+include ../extra.mk
 
 CPPFLAGS += -DOGK_INTERNAL
 LD = ${OBJC}
+LDFLAGS += ${REEXPORT_ALLEGRO}