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oe-init-build-env, scripts/oe-buildenv-internal: add error detecting …
…for $BDIR [YOCTO #671] "readlink -f" in Ubuntu 10.04 is buggy: it doesn't ignore a trailing / (e.g., "readlink -f /tmp/non-existent-dir/" returns nothing, but according to http://www.gnu.org/s/coreutils/manual/coreutils.pdf it should do that -- hence we get bug 671. It seems Ubuntu 10.10 or even later Ubuntu 11.04, and other Linux distributions(e.g., Open Suse 11.4) haven't such an issue. So I think we should detect this and ask Ubuntu 10.04 users to avoid supply a path with trailing slash here. Moreever, I also add the detection of non-existent path, e.g., source oe-init-build-env /non-existent-dir/build can be detected and we'll print an error msg. And, if we get errors in oe-buildenv-internal, we should stop the script and shouldn't further run. Signed-off-by: Dexuan Cui <email@example.com> Signed-off-by: Richard Purdie <firstname.lastname@example.org> Signed-off-by: Koen Kooi <email@example.com>
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