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| author | Masahiro Yamada <masahiroy@kernel.org> | 2022-07-19 04:35:39 +0200 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2022-07-27 14:18:00 +0200 |
| commit | 10269fd37fc60bda700dd2554ff382446d45771d (patch) | |
| tree | 7a5c30708b17e9664575048e6d3d2c4b5f46d3dc /scripts/Kconfig.include | |
| parent | scripts: headers_install.sh: Update config leak ignore entries (diff) | |
| download | linux-10269fd37fc60bda700dd2554ff382446d45771d.tar.xz linux-10269fd37fc60bda700dd2554ff382446d45771d.zip | |
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 <masahiroy@kernel.org>
Tested-by: Nicolas Schier <nicolas@fjasle.eu>
Diffstat (limited to '')
| -rw-r--r-- | scripts/Kconfig.include | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include index 0496efd6e117..c1f4222d223d 100644 --- a/scripts/Kconfig.include +++ b/scripts/Kconfig.include @@ -25,7 +25,7 @@ failure = $(if-success,$(1),n,y) # $(cc-option,<flag>) # Return y if the compiler supports <flag>, 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,<flag>) # Return y if the linker supports <flag>, n otherwise |