diff options
| author | Matthias Kaehlcke <[email protected]> | 2017-06-21 16:28:03 -0700 |
|---|---|---|
| committer | Masahiro Yamada <[email protected]> | 2017-06-25 12:47:55 +0900 |
| commit | 9f3f1fd299768782465cb32cdf0dd4528d11f26b (patch) | |
| tree | 844070b5fac455e1bad324587a3d02c55f9fdbcc /scripts/Kbuild.include | |
| parent | 39a33ff80a259b2bddebb236549baee55f9b4f41 (diff) | |
kbuild: Add __cc-option macro
cc-option uses KBUILD_CFLAGS and KBUILD_CPPFLAGS when it determines
whether an option is supported or not. This is fine for options used to
build the kernel itself, however some components like the x86 boot code
use a different set of flags.
Add the new macro __cc-option which is a more generic version of
cc-option with additional parameters. One parameter is the compiler
with which the check should be performed, the other the compiler options
to be used instead KBUILD_C*FLAGS.
Refactor cc-option and hostcc-option to use __cc-option and move
hostcc-option to scripts/Kbuild.include.
Suggested-by: Arnd Bergmann <[email protected]>
Suggested-by: Masahiro Yamada <[email protected]>
Signed-off-by: Matthias Kaehlcke <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Acked-by: Michal Marek <[email protected]>
Signed-off-by: Masahiro Yamada <[email protected]>
Diffstat (limited to 'scripts/Kbuild.include')
| -rw-r--r-- | scripts/Kbuild.include | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index 53b7d47ce43a..dd8e2dde0b34 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -108,6 +108,11 @@ as-option = $(call try-run,\ as-instr = $(call try-run,\ printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3)) +# __cc-option +# Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586) +__cc-option = $(call try-run,\ + $(1) -Werror $(2) $(3) -c -x c /dev/null -o "$$TMP",$(3),$(4)) + # Do not attempt to build with gcc plugins during cc-option tests. # (And this uses delayed resolution so the flags will be up to date.) CC_OPTION_CFLAGS = $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS)) @@ -115,8 +120,13 @@ CC_OPTION_CFLAGS = $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS)) # cc-option # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) -cc-option = $(call try-run,\ - $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2)) +cc-option = $(call __cc-option, $(CC),\ + $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS),$(1),$(2)) + +# hostcc-option +# Usage: cflags-y += $(call hostcc-option,-march=winchip-c6,-march=i586) +hostcc-option = $(call __cc-option, $(HOSTCC),\ + $(HOSTCFLAGS) $(HOST_EXTRACFLAGS),$(1),$(2)) # cc-option-yn # Usage: flag := $(call cc-option-yn,-march=winchip-c6) |