From: Masahiro Yamada Date: Tue, 19 Jul 2022 02:35:39 +0000 (+0900) Subject: kconfig: shorten the temporary directory name for cc-option X-Git-Tag: v6.0-rc1~45^2~16 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=10269fd37fc60bda700dd2554ff382446d45771d;p=thirdparty%2Fkernel%2Flinux.git kconfig: shorten the temporary directory name for cc-option The cc-option macro creates the temporary directory, .tmp_$$$$. Shell expands '$$' into its process ID. '$$$$' results in repeated PID. In Makefile, '$$$$' is correct (see TMPOUT in scripts/Malefile.compiler) because '$$' is an escape sequence of '$'. Make expands '$$$$' into '$$', then shell expands it into the process ID. This does not apply to Kconfig because Kconfig requires variable references to be enclosed by curly braces, like ${variable}. The '$' that is not followed by '{' loses its effect. Signed-off-by: Masahiro Yamada Tested-by: Nicolas Schier --- diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include index 0496efd6e1179..c1f4222d223d2 100644 --- a/scripts/Kconfig.include +++ b/scripts/Kconfig.include @@ -25,7 +25,7 @@ failure = $(if-success,$(1),n,y) # $(cc-option,) # Return y if the compiler supports , n otherwise -cc-option = $(success,mkdir .tmp_$$$$; trap "rm -rf .tmp_$$$$" EXIT; $(CC) -Werror $(CLANG_FLAGS) $(1) -c -x c /dev/null -o .tmp_$$$$/tmp.o) +cc-option = $(success,mkdir .tmp_$$; trap "rm -rf .tmp_$$" EXIT; $(CC) -Werror $(CLANG_FLAGS) $(1) -c -x c /dev/null -o .tmp_$$/tmp.o) # $(ld-option,) # Return y if the linker supports , n otherwise