apple libhack (-install_name ../lib/libpotion), apple dylib ld fix

Makefile

@@ -118,7 +118,16 @@ ${GREG}: tools/greg.c tools/compile.c tools/tree.c
 	@${ECHO} CC $@
 	@${CC} -O3 -DNDEBUG -o $@ tools/greg.c tools/compile.c tools/tree.c -Itools
 
-potion${EXE}: ${OBJ_POTION} libpotion${DLL}
+ifdef APPLE
+LIBHACK = ../lib/libpotion.dylib
+else
+LIBHACK =
+endif
+../lib/libpotion.dylib:
+	mkdir ../lib
+	ln -s `pwd`/libpotion.dylib ../lib/
+
+potion${EXE}: ${OBJ_POTION} libpotion${DLL} ${LIBHACK}
 	@${ECHO} LINK $@
 	@${CC} ${CFLAGS} ${OBJ_POTION} -o $@ ${LDEXEFLAGS} -lpotion ${LIBS}
 	@if [ "${DEBUG}" != "1" ]; then \

config.mak

@@ -68,7 +68,8 @@ ifeq ($(shell ./tools/config.sh ${CC} apple),1)
 	LOADEXT  = .bundle
 	RUNPOTION = ./potion
 # in builddir: mkdir ../lib; ln -s `pwd`/libpotion.dylib ../lib/
-	LDDLLFLAGS = -shared -fpic -install_name "@executable_path/../lib/libpotion${DLL}"
+	LDDLLFLAGS = -dynamiclib -undefined dynamic_lookup -fpic \
+	             -install_name "@executable_path/../lib/libpotion${DLL}"
 	LDEXEFLAGS = -L.
 else
 	RUNPOTION = ./potion