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| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-07 20:24:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-07 20:24:25 -0800 |
| commit | c4184f117af7441fb83bc413d2214d92920e0289 (patch) | |
| tree | d6f77ef7a5fab96f38567c58d88ccdfe0db3fcbc /scripts/Kbuild.include | |
| parent | 905adce4094d64a6691df994e424fbf486301adc (diff) | |
| download | lwn-c4184f117af7441fb83bc413d2214d92920e0289.tar.gz lwn-c4184f117af7441fb83bc413d2214d92920e0289.zip | |
kbuild: make $(checker-shell ) strip spaces around the result
It looks like GNU make version 3.80 (but apparently not 3.81) adds
leading whitespace to the result of the checker-shell execution. This
strips them off explicitly.
Also, don't bother symlinking the output file to /dev/null. It's likely
as expensive as just writing the temp-file, and we need to remove it
anyway afterwards.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts/Kbuild.include')
| -rw-r--r-- | scripts/Kbuild.include | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index d65c40331e66..8d7eabf238c0 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -60,17 +60,16 @@ endef # Usage: option = $(call checker-shell,$(CC)...-o $$OUT,option-ok,otherwise) # Exit code chooses option. $$OUT is safe location for needless output. define checker-shell + $(strip $(shell set -e; \ DIR=$(KBUILD_EXTMOD); \ cd $${DIR:-$(objtree)}; \ OUT=$$PWD/.$$$$.null; \ - \ - ln -s /dev/null $$OUT; \ if $(1) >/dev/null 2>&1; \ then echo "$(2)"; \ else echo "$(3)"; \ fi; \ - rm -f $$OUT) + rm -f $$OUT)) endef # as-option |