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include: add TestHostCommand and SetupHostCommand macros

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Those macros allow testing various commands on the host system, also process the
prereq tests in the order they're declared.

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

SVN-Revision: 44269
This commit is contained in:
Jo-Philipp Wich 2015-02-05 16:57:02 +00:00
parent 12531a0f86
commit 94e528f159
1 changed files with 46 additions and 2 deletions
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48
include/prereq.mk
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@ -1,5 +1,5 @@
#
# Copyright (C) 2006-2007 OpenWrt.org
# Copyright (C) 2006-2015 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
@ -20,12 +20,16 @@ prereq:
.SILENT: prereq
endif
PREREQ_PREV=
# 1: display name
# 2: error message
define Require
export PREREQ_CHECK=1
ifeq ($$(CHECK_$(1)),)
prereq: prereq-$(1)
prereq-$(1): FORCE
prereq-$(1): $(if $(PREREQ_PREV),prereq-$(PREREQ_PREV)) FORCE
echo -n "Checking '$(1)'... "
if $(NO_TRACE_MAKE) -f $(firstword $(MAKEFILE_LIST)) check-$(1) >/dev/null 2>/dev/null; then \
echo 'ok.'; \
@ -41,6 +45,8 @@ define Require
.SILENT: prereq-$(1) check-$(1)
.NOTPARALLEL:
endif
PREREQ_PREV=$(1)
endef
@ -60,3 +66,41 @@ define RequireHeader
$$(eval $$(call Require,$(1),$(2)))
endef
define QuoteHostCommand
'$(subst ','"'"',$(strip $(1)))'
endef
# 1: display name
# 2: failure message
# 3: test
define TestHostCommand
define Require/$(1)
($(3)) >/dev/null 2>/dev/null
endef
$$(eval $$(call Require,$(1),$(2)))
endef
# 1: canonical name
# 2: failure message
# 3+: candidates
define SetupHostCommand
define Require/$(1)
for cmd in $(call QuoteHostCommand,$(3)) $(call QuoteHostCommand,$(4)) \
$(call QuoteHostCommand,$(5)) $(call QuoteHostCommand,$(6)) \
$(call QuoteHostCommand,$(7)) $(call QuoteHostCommand,$(8)); do \
if [ -n "$$$$$$$$cmd" ]; then \
bin="$$$$$$$$(PATH="$(subst $(space),:,$(filter-out $(STAGING_DIR_HOST)/%,$(subst :,$(space),$(PATH))))" \
which "$$$$$$$${cmd%% *}")"; \
if [ -x "$$$$$$$$bin" ] && eval "$$$$$$$$cmd" >/dev/null 2>/dev/null; then \
mkdir -p "$(STAGING_DIR_HOST)/bin"; \
ln -sf "$$$$$$$$bin" "$(STAGING_DIR_HOST)/bin/$(strip $(1))"; \
exit 0; \
fi; \
fi; \
done; \
exit 1
endef
$$(eval $$(call Require,$(1),$(if $(2),$(2),Missing $(1) command)))
endef