diff options
Diffstat (limited to 'make_helpers')
| -rw-r--r-- | make_helpers/build_macros.mk | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/make_helpers/build_macros.mk b/make_helpers/build_macros.mk index 89f43f2f3..9ca6bdf0c 100644 --- a/make_helpers/build_macros.mk +++ b/make_helpers/build_macros.mk @@ -38,6 +38,18 @@ define uppercase $(eval uppercase_result:=$(call uppercase_internal,$(uppercase_table),$(1)))$(uppercase_result) endef +# Convenience function for setting a variable to 0 if not previously set +# $(eval $(call default_zero,FOO)) +define default_zero + $(eval $(1) ?= 0) +endef + +# Convenience function for setting a list of variables to 0 if not previously set +# $(eval $(call default_zeros,FOO BAR)) +define default_zeros + $(foreach var,$1,$(eval $(call default_zero,$(var)))) +endef + # Convenience function for adding build definitions # $(eval $(call add_define,FOO)) will have: # -DFOO if $(FOO) is empty; -DFOO=$(FOO) otherwise @@ -45,7 +57,6 @@ define add_define DEFINES += -D$(1)$(if $(value $(1)),=$(value $(1)),) endef - # Convenience function for addding multiple build definitions # $(eval $(call add_defines,FOO BOO)) define add_defines |