[Bug libstdc++/96718] 25_algorithms/pstl/feature_test-3.cc has excess error

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96718

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:

https://gcc.gnu.org/g:988fb2f597d67cdf3603654372c020c28448441f

commit r11-2797-g988fb2f597d67cdf3603654372c020c28448441f
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Aug 21 12:01:05 2020 +0100

    libstdc++: Skip PSTL tests when installed TBB is too old [PR 96718]

    These tests do not actually require TBB, because they only inspect the
    feature test macros present in the headers. However, if TBB is installed
    then its headers will be included, and the version will be checked. If
    the version is too old, compilation fails due to a #error directive.

    This change disables the tests if TBB is not present, so that we skip
    them instead of failing.

    libstdc++-v3/ChangeLog:

            PR libstdc++/96718
            * testsuite/25_algorithms/pstl/feature_test-2.cc: Require
            tbb-backend effective target.
            * testsuite/25_algorithms/pstl/feature_test-3.cc: Likewise.
            * testsuite/25_algorithms/pstl/feature_test-5.cc: Likewise.
            * testsuite/25_algorithms/pstl/feature_test.cc: Likewise.