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Normalize rpath entries to guard against missing default solib dir #14660

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Normalize rpath entries to guard against missing default solib dir #14660

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Commits on Feb 9, 2022

  1. Normalize rpath entries to guard against missing default solib dir 

    When all dynamic deps in a build are built in transitioned
configurations, the default solib dir is not created. However, while
resolving paths, the dynamic linker stops at the first directory that
does not exist, even when followed by "../".

Before this commit, all rpath entries would consist of the relative
path to the default solib dir followed by the relative path to the
particular library's solib dir. Thus, if the default solib dir was
missing, the dynamic linker wouldn't resolve any of these paths.

This commit ensures that the relative path entries are normalized and
thus contain no references to non-existing directories assuming the
normalized path itself exists.

Work towards bazelbuild#13819.
    @fmeum
    fmeum committed Feb 9, 2022
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