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authorMasahiro Yamada <yamada.masahiro@socionext.com>2017-10-02 17:07:28 +0900
committerMasahiro Yamada <yamada.masahiro@socionext.com>2017-10-07 20:08:02 +0900
commit028568d84da3cfca49f5f846eeeef01441d70451 (patch)
tree6ffc6471517542ddb3d2470ccdc98fd93ac27fcc /Makefile
parent9e66317d3c92ddaab330c125dfe9d06eee268aff (diff)
downloadlwn-028568d84da3cfca49f5f846eeeef01441d70451.tar.gz
lwn-028568d84da3cfca49f5f846eeeef01441d70451.zip
kbuild: revert $(realpath ...) to $(shell cd ... && /bin/pwd)
I thought commit 8e9b46679923 ("kbuild: use $(abspath ...) instead of $(shell cd ... && /bin/pwd)") was a safe conversion, but it changed the behavior. $(abspath ...) / $(realpath ...) does not expand shell special characters, such as '~'. Here is a simple Makefile example: ---------------->8---------------- $(info /bin/pwd: $(shell cd ~/; /bin/pwd)) $(info abspath: $(abspath ~/)) $(info realpath: $(realpath ~/)) all: @: ---------------->8---------------- $ make /bin/pwd: /home/masahiro abspath: /home/masahiro/workspace/~ realpath: This can be a real problem if 'make O=~/foo' is invoked from another Makefile or primitive shell like dash. This commit partially reverts 8e9b46679923. Fixes: 8e9b46679923 ("kbuild: use $(abspath ...) instead of $(shell cd ... && /bin/pwd)") Reported-by: Julien Grall <julien.grall@arm.com> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Tested-by: Julien Grall <julien.grall@arm.com>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile4
1 files changed, 2 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index cf007a31d575..1b487175f3bc 100644
--- a/Makefile
+++ b/Makefile
@@ -130,8 +130,8 @@ endif
ifneq ($(KBUILD_OUTPUT),)
# check that the output directory actually exists
saved-output := $(KBUILD_OUTPUT)
-$(shell [ -d $(KBUILD_OUTPUT) ] || mkdir -p $(KBUILD_OUTPUT))
-KBUILD_OUTPUT := $(realpath $(KBUILD_OUTPUT))
+KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
+ && /bin/pwd)
$(if $(KBUILD_OUTPUT),, \
$(error failed to create output directory "$(saved-output)"))