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Subject[PATCH 20/30] kconfig: add basic helper macros to scripts/Kconfig.include
Date
Kconfig got text processing tools like we see in Make.  Add Kconfig
helper macros to scripts/Kconfig.include like we collect Makefile
macros in scripts/Kbuild.include.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>
---

Changes in v3:
- Move helpers to scripts/Kconfig.include

Changes in v2: None

Kconfig | 2 ++
MAINTAINERS | 1 +
scripts/Kconfig.include | 17 +++++++++++++++++
3 files changed, 20 insertions(+)
create mode 100644 scripts/Kconfig.include

diff --git a/Kconfig b/Kconfig
index 5b55d87..a90d9f9 100644
--- a/Kconfig
+++ b/Kconfig
@@ -7,4 +7,6 @@ mainmenu "Linux/$(ARCH) $(KERNELVERSION) Kernel Configuration"

comment "Compiler: $(CC_VERSION_TEXT)"

+source "scripts/Kconfig.include"
+
source "arch/$(SRCARCH)/Kconfig"
diff --git a/MAINTAINERS b/MAINTAINERS
index b9dab38..d962f4a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7624,6 +7624,7 @@ L: linux-kbuild@vger.kernel.org
S: Maintained
F: Documentation/kbuild/kconfig*
F: scripts/kconfig/
+F: scripts/Kconfig.include

KDUMP
M: Dave Young <dyoung@redhat.com>
diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
new file mode 100644
index 0000000..cac7a81
--- /dev/null
+++ b/scripts/Kconfig.include
@@ -0,0 +1,17 @@
+# Kconfig helper macros
+
+# Convenient variables
+comma := ,
+quote := "
+squote := '
+empty :=
+space := $(empty) $(empty)
+
+# y if the command exits with 0, n otherwise
+success = $(shell ($(1)) >/dev/null 2>&1 && echo y || echo n)
+
+# y if the given compiler flag is supported, n otherwise
+cc-option = $(success $(CC) -Werror $(1) -c -x c /dev/null -o /dev/null)
+
+# y if the given linker flag is supported, n otherwise
+ld-option = $(success $(LD) -v $(1))
--
2.7.4
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