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#
# 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
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