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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/111238] libstdc++ tests should use -Wl,-gc-sections
 in more configurations
Date: Mon, 04 Sep 2023 20:44:59 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111238

--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Christophe Lyon <clyon@gcc.gnu.org>:

https://gcc.gnu.org/g:56d0592db19b69e3cc217fabe5c2f8be3a75a8cf

commit r14-3660-g56d0592db19b69e3cc217fabe5c2f8be3a75a8cf
Author: Christophe Lyon <christophe.lyon@linaro.org>
Date:   Thu Aug 31 13:50:16 2023 +0000

    libstdc++: Use GLIBCXX_CHECK_LINKER_FEATURES for cross-builds (PR111238)

    As discussed in PR104167 (comments #8 and below), and PR111238, using
    -Wl,-gc-sections in the libstdc++ testsuite for arm-eabi
    (cross-toolchain) avoids link failures for a few tests:

    27_io/filesystem/path/108636.cc
    std/time/clock/gps/1.cc
    std/time/clock/gps/io.cc
    std/time/clock/tai/1.cc
    std/time/clock/tai/io.cc
    std/time/clock/utc/1.cc
    std/time/clock/utc/io.cc
    std/time/clock/utc/leap_second_info.cc
    std/time/exceptions.cc
    std/time/format.cc
    std/time/time_zone/get_info_local.cc
    std/time/time_zone/get_info_sys.cc
    std/time/tzdb/1.cc
    std/time/tzdb/leap_seconds.cc
    std/time/tzdb_list/1.cc
    std/time/zoned_time/1.cc
    std/time/zoned_time/custom.cc
    std/time/zoned_time/io.cc
    std/time/zoned_traits.cc

    This patch achieves this by calling GLIBCXX_CHECK_LINKER_FEATURES in
    cross-build cases, like we already do for native builds. We keep not
    doing so in Canadian-cross builds.

    However, this would hide the fact that libstdc++ somehow forces the
    user to use -Wl,-gc-sections to avoid undefined references to chdir,
    mkdir, chmod, pathconf, ... so maybe it's better to keep the status
    quo and not apply this patch?

    2023-08-31  Christophe Lyon  <christophe.lyon@linaro.org>

    libstdc++-v3/ChangeLog:

            PR libstdc++/111238
            * configure: Regenerate.
            * configure.ac: Call GLIBCXX_CHECK_LINKER_FEATURES in cross,
            non-Canadian builds.=