2020-12-03 14:26:38 -05:00
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# util.mk - Miscellaneous utility functions for use in Makefiles
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# Throws an error if the value of the variable named by $(1) is not in the list given by $(2)
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define validate-option
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# value must be part of the list
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ifeq ($$(filter $($(1)),$(2)),)
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$$(error Value of $(1) must be one of the following: $(2))
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endif
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# value must be a single word (no whitespace)
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ifneq ($$(words $($(1))),1)
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$$(error Value of $(1) must be one of the following: $(2))
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endif
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endef
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# Returns the path to the command $(1) if exists. Otherwise returns an empty string.
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find-command = $(shell which $(1) 2>/dev/null)
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2025-11-01 01:26:49 -07:00
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find-mips-prefix = $(shell test -n "$(call find-command,$(1)-ld)" && test -n "$(call find-command,$(1)-gcc)" && echo $(1))
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MIPS_PREFIX_CANDIDATES := mips64-elf mips-n64 mips64 mips-linux-gnu mips64-linux-gnu mips64-none-elf mips mips-suse-linux
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define _find-mips-toolchain-internal
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$(eval DETECTED_PREFIX :=)
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$(eval _unused := $(foreach prefix,$(MIPS_PREFIX_CANDIDATES),\
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$(if $(DETECTED_PREFIX),,\
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$(if $(call find-mips-prefix,$(prefix)),\
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$(eval DETECTED_PREFIX := $(prefix)-)))))
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$(if $(DETECTED_PREFIX),,$(error Unable to detect a suitable MIPS toolchain installed))
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$(DETECTED_PREFIX)
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endef
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find-mips-toolchain = $(strip $(call _find-mips-toolchain-internal))
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