[Buildroot] [git commit] core/br2-external: fix use of relative paths
Peter Korsgaard
peter at korsgaard.com
Mon Jan 16 12:55:09 UTC 2017
commit: https://git.buildroot.net/buildroot/commit/?id=05576fca13b129da8c7186ee2307981135d3391f
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master
Fixes #9576
When the path to a br2-external tree is relative, make enters an endless
recursive loop (paths elided for brevity):
$ make BR2_EXTERNAL=.. foo_defconfig
make[1]: stat: ../configs/../configs/../configs[...]/toto_defconfig: Filename too long
make[1]: *** No rule to make target '../configs/../configs/../configs[...]/toto_defconfig',
needed by '../configs/../configs/../configs[...]/toto_defconfig'. Stop.
Makefile:79: recipe for target '_all' failed
make: *** [_all] Error 2
It is a bit complex to understand the actual technical reason for this
never-ending expansion; it seems it happens in the code generated by the
percent_defconfig macro. Not sure why, though...
But the root cause is the relative path.
Just use absolute, canonical paths to br2-external trees. Always.
[Peter: add bugzilla reference]
Reported-by: outtierbert at gmail.com
Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
support/scripts/br2-external | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/support/scripts/br2-external b/support/scripts/br2-external
index 84bc334..26bcac8 100755
--- a/support/scripts/br2-external
+++ b/support/scripts/br2-external
@@ -106,7 +106,8 @@ do_validate_one() {
error "'%s/Config.in': no such file or directory\n" "${br2_ext}"
fi
- # Register this br2-external tree
+ # Register this br2-external tree, use an absolute canonical path
+ br2_ext="$( cd "${br2_ext}"; pwd )"
BR2_EXT_NAMES+=( "${br2_name}" )
eval BR2_EXT_PATHS_${br2_name}="\"\${br2_ext}\""
eval BR2_EXT_DESCS_${br2_name}="\"\${br2_desc:-\${br2_name}}\""
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