-$(eval $(call Require,zlib, \
- No zlib development files were not found on your system. \
-))
-
-
-$(eval $(call RequireCommand,bison, \
- Please install GNU bison. \
-))
-
-$(eval $(call RequireCommand,flex, \
- Please install flex. \
-))
-
-$(eval $(call RequireCommand,python, \
- Please install python. \
-))
-
-$(eval $(call RequireCommand,unzip, \
- Please install unzip. \
-))
-
-$(eval $(call RequireCommand,bzip2, \
- Please install bzip2. \
-))
-
-$(eval $(call RequireCommand,patch, \
- Please install patch. \
-))
+# 1: canonical name
+# 2: failure message
+# 3+: candidates
+define SetupHostCommand
+ define Require/$(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)); 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