[09/23] kconfig: add 'cc-option' macro

Message ID 1518806331-7101-10-git-send-email-yamada.masahiro@socionext.com
State New
Headers show
Series
  • kconfig: move compiler capability tests to Kconfig
Related show

Commit Message

Masahiro Yamada Feb. 16, 2018, 6:38 p.m.
This will be the most frequently used macro.  It evaluates to 'y' if
the given argument is supported by the compiler, or 'n' otherwise.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

---

 init/Kconfig | 4 ++++
 1 file changed, 4 insertions(+)

-- 
2.7.4

Patch

diff --git a/init/Kconfig b/init/Kconfig
index b4814e6..f026a62 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -8,6 +8,10 @@  config DEFCONFIG_LIST
 	default ARCH_DEFCONFIG
 	default "arch/$ARCH/defconfig"
 
+config cc-option
+	string
+	macro $(shell $CC -Werror $(1) -c -x c /dev/null -o /dev/null)
+
 config CONSTRUCTORS
 	bool
 	depends on !UML