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# SPDX-License-Identifier: GPL-2.0-only
#
# Copyright (C) 2006-2020 OpenWrt.org
ifneq ($(__prereq_inc),1)
__prereq_inc:=1
prereq:
if [ -f $(TMP_DIR)/.prereq-error ]; then \
echo; \
cat $(TMP_DIR)/.prereq-error; \
rm -f $(TMP_DIR)/.prereq-error; \
echo; \
false; \
fi
.SILENT: prereq
endif
PREREQ_PREV=
# 1: display name
# 2: error message
define Require
export PREREQ_CHECK=1
ifeq ($$(CHECK_$(1)),)
prereq: prereq-$(1)
prereq-$(1): $(if $(PREREQ_PREV),prereq-$(PREREQ_PREV)) FORCE
printf "Checking '$(1)'... "
if $(NO_TRACE_MAKE) -f $(firstword $(MAKEFILE_LIST)) check-$(1) >/dev/null 2>/dev/null; then \
echo 'ok.'; \
else \
echo 'failed.'; \
echo "$(PKG_NAME): $(strip $(2))" >> $(TMP_DIR)/.prereq-error; \
fi
check-$(1): FORCE
$(call Require/$(1))
CHECK_$(1):=1
.SILENT: prereq-$(1) check-$(1)
.NOTPARALLEL:
endif
PREREQ_PREV=$(1)
endef
define RequireCommand
define Require/$(1)
command -v $(1)
endef
$$(eval $$(call Require,$(1),$(2)))
endef
define RequireHeader
define Require/$(1)
[ -e "$(1)" ]
endef
$$(eval $$(call Require,$(1),$(2)))
endef
# 1: header to test
# 2: failure message
# 3: optional compile time test
# 4: optional link library test (example -lncurses)
define RequireCHeader
define Require/$(1)
echo 'int main(int argc, char **argv) { $(3); return 0; }' | gcc -include $(1) -x c -o $(TMP_DIR)/a.out - $(4)
endef
$$(eval $$(call Require,$(1),$(2)))
endef
define CleanupPython2
define Require/python2-cleanup
if [ -f "$(STAGING_DIR_HOST)/bin/python" ] && \
$(STAGING_DIR_HOST)/bin/python -V 2>&1 | \
grep -q 'Python 2'; then \
rm $(STAGING_DIR_HOST)/bin/python; \
fi
endef
$$(eval $$(call Require,python2-cleanup))
endef
define QuoteHostCommand
'$(subst ','"'"',$(strip $(1)))'
endef
# 1: display name
# 2: failure message
# 3: test
define TestHostCommand
define Require/$(1)
($(3)) >/dev/null 2>/dev/null
endef
$$(eval $$(call Require,$(1),$(2)))
endef
# 1: canonical name
# 2: failure message
# 3+: candidates
define SetupHostCommand
define Require/$(1)
[ -f "$(STAGING_DIR_HOST)/bin/$(strip $(1))" ] && exit 0; \
for cmd in $(call QuoteHostCommand,$(3)) $(call QuoteHostCommand,$(4)) \
$(call QuoteHostCommand,$(5)) $(call QuoteHostCommand,$(6)) \
$(call QuoteHostCommand,$(7)) $(call QuoteHostCommand,$(8)) \
$(call QuoteHostCommand,$(9)) $(call QuoteHostCommand,$(10)) \
$(call QuoteHostCommand,$(11)) $(call QuoteHostCommand,$(12)); do \
if [ -n "$$$$$$$$cmd" ]; then \
bin="$$$$$$$$(PATH="$(subst $(space),:,$(filter-out $(STAGING_DIR_HOST)/%,$(subst :,$(space),$(PATH))))" \
command -v "$$$$$$$${cmd%% *}")"; \
if [ -x "$$$$$$$$bin" ] && eval "$$$$$$$$cmd" >/dev/null 2>/dev/null; then \
mkdir -p "$(STAGING_DIR_HOST)/bin"; \
ln -sf "$$$$$$$$bin" "$(STAGING_DIR_HOST)/bin/$(strip $(1))"; \
exit 0; \
fi; \
fi; \
done; \
exit 1
endef
$$(eval $$(call Require,$(1),$(if $(2),$(2),Missing $(1) command)))
endef
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