diff options
| author | Jerome Forissier <jerome.forissier@linaro.org> | 2015-10-28 13:56:57 +0100 |
|---|---|---|
| committer | Jerome Forissier <jerome.forissier@linaro.org> | 2015-10-28 15:06:24 +0100 |
| commit | 10b7925c329b8d1838525107d305a4192d9e81df (patch) | |
| tree | a709d855c18284bcfe79c99fa0fbf0869e8fc23c /mk/checkconf.mk | |
| parent | 21b3ff1d09e7559a99ce3fd4265328782191cb64 (diff) | |
mk/checkconf.mk: Add optional reason text to the 'force' macro
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Pascal Brand <pascal.brand@linaro.org>
Tested-by: Pascal Brand <pascal.brand@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'mk/checkconf.mk')
| -rw-r--r-- | mk/checkconf.mk | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/mk/checkconf.mk b/mk/checkconf.mk index 0c2aad79..65a2391c 100644 --- a/mk/checkconf.mk +++ b/mk/checkconf.mk @@ -147,17 +147,21 @@ cfg-enable-all-depends = ) \ ) -# Set a variable and error out if it was previously set to a different value +# Set a variable or error out if it was previously set to a different value +# The reason message (3rd parameter) is optional # Example: -# $(call force,CFG_FOO,foo) +# $(call force,CFG_FOO,foo,required by CFG_BAR) define force -$(eval $(call _force,$(1),$(2))) +$(eval $(call _force,$(1),$(2),$(3))) endef define _force ifdef $(1) ifneq ($($(1)),$(2)) -$$(error $(1) is set to '$($(1))' (from $(origin $(1))) but its value must be '$2') +ifneq (,$(3)) +_reason := $$(_empty) [$(3)] +endif +$$(error $(1) is set to '$($(1))' (from $(origin $(1))) but its value must be '$(2)'$$(_reason)) endif endif $(1) := $(2) |