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| author | Thomas Gleixner <tglx@linutronix.de> | 2018-03-14 20:37:31 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-03-14 20:37:31 +0100 |
| commit | b0d8bef8ed805ca92eb91e86acf3ce89cbebc8ce (patch) | |
| tree | 8838391a76f0cf75ffcd31166996d03d19c580a6 /tools/scripts/Makefile.include | |
| parent | softirq: Consolidate common code in tasklet_[hi]_action() (diff) | |
| parent | Merge tag 'nfs-for-4.16-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs (diff) | |
| download | linux-b0d8bef8ed805ca92eb91e86acf3ce89cbebc8ce.tar.gz linux-b0d8bef8ed805ca92eb91e86acf3ce89cbebc8ce.zip | |
Merge branch 'linus' into irq/core to pick up dependencies.
Diffstat (limited to 'tools/scripts/Makefile.include')
| -rw-r--r-- | tools/scripts/Makefile.include | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include index fcb3ed0be5f8..dd614463d4d6 100644 --- a/tools/scripts/Makefile.include +++ b/tools/scripts/Makefile.include @@ -42,6 +42,24 @@ EXTRA_WARNINGS += -Wformat CC_NO_CLANG := $(shell $(CC) -dM -E -x c /dev/null | grep -Fq "__clang__"; echo $$?) +# Makefiles suck: This macro sets a default value of $(2) for the +# variable named by $(1), unless the variable has been set by +# environment or command line. This is necessary for CC and AR +# because make sets default values, so the simpler ?= approach +# won't work as expected. +define allow-override + $(if $(or $(findstring environment,$(origin $(1))),\ + $(findstring command line,$(origin $(1)))),,\ + $(eval $(1) = $(2))) +endef + +# Allow setting various cross-compile vars or setting CROSS_COMPILE as a prefix. +$(call allow-override,CC,$(CROSS_COMPILE)gcc) +$(call allow-override,AR,$(CROSS_COMPILE)ar) +$(call allow-override,LD,$(CROSS_COMPILE)ld) +$(call allow-override,CXX,$(CROSS_COMPILE)g++) +$(call allow-override,STRIP,$(CROSS_COMPILE)strip) + ifeq ($(CC_NO_CLANG), 1) EXTRA_WARNINGS += -Wstrict-aliasing=3 endif |