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Teach cc_configure about BAZEL_LINKLIBS env variable #8660

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Teach cc_configure about BAZEL_LINKLIBS env variable #8660

wants to merge 3 commits into from

Commits on Jun 18, 2019

  1. Teach cc_configure about BAZEL_LINKLIBS env variable 

    Using this variable is will be possible to specify system libraries that should
be added after default linker flags, after libraries to link, and after user
link flags (i.e. --linkopt and `linkopts` rule attribute).

Flag separator is `:`, similarly to BAZEL_LINKOPTS. Escaping is done by `%`.

Default value is empty string.

With this it's possible to force Bazel to statically link libstdc++ by using:

    BAZEL_LINKOPTS=-static-libstdc++ BAZEL_LINKLIBS=-l%:libstdc++.a bazel build //foo

RELNOTES: Bazel's C++ autoconfiguration now understands BAZEL_LINKLIBS
GOOGLE:
    @hlopko
    hlopko committed Jun 18, 2019
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  2. Convert link_libs into starlark list before putting into template

    @hlopko
    hlopko committed Jun 18, 2019
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  3. Guard against empty link_libs

    @hlopko
    hlopko committed Jun 18, 2019
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