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authorMasahiro Yamada <masahiroy@kernel.org>2022-07-19 11:35:39 +0900
committerMasahiro Yamada <masahiroy@kernel.org>2022-07-27 21:18:00 +0900
commit10269fd37fc60bda700dd2554ff382446d45771d (patch)
tree7a5c30708b17e9664575048e6d3d2c4b5f46d3dc /scripts
parente3b746a384fc2f3b7b4a8c9aad5024130a975c43 (diff)
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 'scripts')
-rw-r--r--scripts/Kconfig.include2
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