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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 /scripts
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>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/Kconfig.include27
1 files changed, 27 insertions, 0 deletions
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))