make package prereq checks behave more like build prereq checks (first check...

make package prereq checks behave more like build prereq checks (first check all, then fail if necessary), also make them less verbose

SVN-Revision: 12106

Makefile

@@ -56,8 +56,19 @@ dirclean: clean
 	rm -rf $(STAGING_DIR) $(STAGING_DIR_HOST) $(STAGING_DIR_TOOLCHAIN) $(TOOLCHAIN_DIR) $(BUILD_DIR_HOST)
 	rm -rf $(TMP_DIR)
 
+tmp/.prereq_packages: .config
+	unset ERROR; \
+	for package in $(sort $(prereq-y) $(prereq-m)); do \
+		$(NO_TRACE_MAKE) -s -r -C package/$$package prereq || ERROR=1; \
+	done; \
+	if [ -n "$$ERROR" ]; then \
+		echo "Package prerequisite check failed."; \
+		false; \
+	fi
+	touch $@
+
 # check prerequisites before starting to build
-prereq: $(package/stamp-prereq) $(target/stamp-prereq) ;
+prereq: $(target/stamp-prereq) tmp/.prereq_packages
 
 prepare: .config $(tools/stamp-install) $(toolchain/stamp-install)
 world: prepare $(target/stamp-compile) $(package/stamp-cleanup) $(package/stamp-compile) $(package/stamp-install) $(package/stamp-rootfs-prepare) $(target/stamp-install) FORCE