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authorMasahiro Yamada <yamada.masahiro@socionext.com>2018-05-28 18:21:59 +0900
committerMasahiro Yamada <yamada.masahiro@socionext.com>2018-05-29 03:31:19 +0900
commite1cfdc0e72fc9ad7c04ad6329acb92876e062849 (patch)
treef32ea4e4715c0559bba4d8cb9014b582d76f355e
parent21c54b774744719c386fbdc829b0e7759edb8ece (diff)
downloadlinux-stericsson-e1cfdc0e72fc9ad7c04ad6329acb92876e062849.tar.gz
kconfig: add basic helper macros to scripts/Kconfig.include
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>
-rw-r--r--Kconfig2
-rw-r--r--MAINTAINERS1
-rw-r--r--arch/x86/um/Kconfig2
-rw-r--r--scripts/Kconfig.include27
4 files changed, 32 insertions, 0 deletions
diff --git a/Kconfig b/Kconfig
index 5b55d876af03..a90d9f9e268b 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 b87723a6ef32..79decb12cfbf 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7639,6 +7639,7 @@ 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/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index a992f8e94887..9d529f22fd9d 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -3,6 +3,8 @@ mainmenu "User Mode Linux/$(SUBARCH) $(KERNELVERSION) Kernel Configuration"
comment "Compiler: $(CC_VERSION_TEXT)"
+source "scripts/Kconfig.include"
+
source "arch/um/Kconfig.common"
menu "UML-specific options"
diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
new file mode 100644
index 000000000000..bf7c0c9fa3a4
--- /dev/null
+++ b/scripts/Kconfig.include
@@ -0,0 +1,27 @@
+# Kconfig helper macros
+
+# Convenient variables
+comma := ,
+quote := "
+squote := '
+empty :=
+space := $(empty) $(empty)
+dollar := $
+right_paren := )
+left_paren := (
+
+# $(if-success,<command>,<then>,<else>)
+# Return <then> if <command> exits with 0, <else> otherwise.
+if-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)")
+
+# $(success,<command>)
+# Return y if <command> exits with 0, n otherwise
+success = $(if-success,$(1),y,n)
+
+# $(cc-option,<flag>)
+# Return y if the compiler supports <flag>, n otherwise
+cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null)
+
+# $(ld-option,<flag>)
+# Return y if the linker supports <flag>, n otherwise
+ld-option = $(success,$(LD) -v $(1))