--enable-mca-no-build=io-romio341 should still work.  Or just 
--disable-io-romio.

No comment around the RHEL7 part; that's pretty old, but I don't think we've 
officially said it is too old.  Probably something worth filing a ticket for so 
that we can run to ground before 5.0 release.  Oddly, CI continues to pass on 
RHEL7 in AWS.  I'm not sure what we've done to cause that, but also worth 
investigating.

Brian

On 11/14/22, 10:32 PM, "devel on behalf of Gilles Gouaillardet via devel" 
<devel-boun...@lists.open-mpi.org on behalf of devel@lists.open-mpi.org> wrote:

    CAUTION: This email originated from outside of the organization. Do not 
click links or open attachments unless you can confirm the sender and know the 
content is safe.



    Folks,


    I tried to build on a RHEL7 like, and it fails at make time because
    ROMIO requires stdatomic.h

    (it seems this file is only available from GCC 4.9)


    Are we supposed to be able to build Open MPI 5 with GCC 4.8 (e.g. stock
    RHEL7 compiler)?


    --enable-mca-no-build=io-romio314 cannot help since ROMIO has been moved
    to 3rd-party

    is there an other workaround? if not, should be add something like
    --enable-3rd-party-no-build=romio?


    Cheers,


    Gilles

    On 10/22/2022 6:23 AM, Austen W Lauria via devel wrote:
    > Open MPI v5.0.0rc9 is now available for testing
    > athttps://www.open-mpi.org/software/ompi/v5.0/
    > <https://www.open-mpi.org/software/ompi/v5.0/>.
    >
    > Please test, and send feedback either via the user mailing lists, or
    > create an issue athttps://github.com/open-mpi/ompi/issues/
    > <https://github.com/open-mpi/ompi/issues/> .
    >
    > Seehttps://docs.open-mpi.org/en/v5.0.x/news/news-v5.0.x.html
    > <https://docs.open-mpi.org/en/v5.0.x/news/news-v5.0.x.html> for a list
    > of changes since rc8.
    >
    > Thank you,
    > v5.0 Release Managers


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