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authorMasahiro Yamada <masahiroy@kernel.org>2022-07-28 06:14:33 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2022-08-03 16:56:38 +0300
commitdd29865633a5535889568b5f38f74a445c227e5d (patch)
treebc9c00770da51637468122ca5b621d5626a35951
parent7193cda917ffbf5a473cbf3d26ba6787b6b02a84 (diff)
downloadlinux-dd29865633a5535889568b5f38f74a445c227e5d.tar.xz
kbuild: set EXIT trap before creating temporary directory
Swap the order of 'mkdir' and 'trap' just in case the subshell is interrupted between 'mkdir' and 'trap' although the effect might be subtle. This does not intend to make the cleanup perfect. There are more cases that miss to remove the tmp directory, for example: - When interrupted, dash does not invoke the EXIT trap (bash does) - 'rm' command might be interrupted before removing the directory I am not addressing all the cases since the tmp directory is harmless after all. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
-rw-r--r--scripts/Kconfig.include2
-rw-r--r--scripts/Makefile.compiler2
2 files changed, 2 insertions, 2 deletions
diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
index c1f4222d223d..a0ccceb22cf8 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_$$/tmp.o)
+cc-option = $(success,trap "rm -rf .tmp_$$" EXIT; mkdir .tmp_$$; $(CC) -Werror $(CLANG_FLAGS) $(1) -c -x c /dev/null -o .tmp_$$/tmp.o)
# $(ld-option,<flag>)
# Return y if the linker supports <flag>, n otherwise
diff --git a/scripts/Makefile.compiler b/scripts/Makefile.compiler
index 86ecd2ac874c..94d0d40cddb3 100644
--- a/scripts/Makefile.compiler
+++ b/scripts/Makefile.compiler
@@ -21,8 +21,8 @@ TMPOUT = $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_$$$$
# automatically cleaned up.
try-run = $(shell set -e; \
TMP=$(TMPOUT)/tmp; \
- mkdir -p $(TMPOUT); \
trap "rm -rf $(TMPOUT)" EXIT; \
+ mkdir -p $(TMPOUT); \
if ($(1)) >/dev/null 2>&1; \
then echo "$(2)"; \
else echo "$(3)"; \