libIDL: only for Darwin

package/libIDL/Makefile

@@ -26,7 +26,9 @@ $(eval $(call HOST_template,LIBIDL,libidl,$(PKG_VERSION)-${PKG_RELEASE}))
 $(eval $(call PKG_template,LIBIDL,libidl,$(PKG_VERSION)-${PKG_RELEASE},${PKG_DEPENDS},${PKG_DESCR},${PKG_SECTION},${PKG_OPTS}))
 
 CONFIGURE_ENV+=		libIDL_cv_long_long_format=ll
+ifeq ($(OS_FOR_BUILD),Darwin)
 HOST_LDFLAGS+=		-liconv
+endif
 
 libidl-install:
 	$(INSTALL_DIR) $(IDIR_LIBIDL)/usr/lib