diff options
Diffstat (limited to 'include/prereq.mk')
| -rw-r--r-- | include/prereq.mk | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/include/prereq.mk b/include/prereq.mk new file mode 100644 index 0000000000..eda7ca35a6 --- /dev/null +++ b/include/prereq.mk @@ -0,0 +1,54 @@ +# +# Copyright (C) 2006 OpenWrt.org +# +# This is free software, licensed under the GNU General Public License v2. +# See /LICENSE for more information. +# + +$(TMP_DIR): + mkdir -p $@ + +prereq: + if [ -f $(TMP_DIR)/.prereq-error ]; then \ + echo; \ + cat $(TMP_DIR)/.prereq-error; \ + echo; \ + rm -rf $(TMP_DIR); \ + false; \ + fi + rm -rf $(TMP_DIR) + mkdir -p $(TMP_DIR) + +.SILENT: $(TMP_DIR) prereq + +define Require + export PREREQ_CHECK=1 + ifeq ($$(CHECK_$(1)),) + prereq: prereq-$(1) + + prereq-$(1): $(TMP_DIR) FORCE + echo -n "Checking '$(1)'... " + if $(NO_TRACE_MAKE) -f $(firstword $(MAKEFILE_LIST)) check-$(1) >/dev/null 2>/dev/null; then \ + echo 'ok.'; \ + else \ + echo 'failed.'; \ + echo -e "$(strip $(2))" >> $(TMP_DIR)/.prereq-error; \ + fi + + check-$(1): FORCE + $(call Require/$(1)) + CHECK_$(1):=1 + + .SILENT: prereq-$(1) check-$(1) + endif +endef + + +define RequireCommand + define Require/$(1) + which $(1) + endef + + $$(eval $$(call Require,$(1),$(2))) +endef + |