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configure: Only build the s390-ccw bios if the compiler supports -march=z900

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We want to build our s390-ccw bios with -march=z900 so that it also
works with the oldest s390x CPU that we support with TCG. However,
Clang on s390x does not support -march=z900 anymore, so we can not
use this compiler to build the s390-ccw bios. Thus add a proper test
to the configure script to see whether the compiler is usable.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1547470346-18416-1-git-send-email-thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Thomas Huth 2019-01-14 13:52:26 +01:00 committed by Cornelia Huck
parent 37dbd1f4d4
commit 2e33c3f848
1 changed files with 5 additions and 1 deletions
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4
configure vendored
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@ -5889,9 +5889,13 @@ if test "$cpu" = "ppc64" -a "$targetos" != "Darwin" ; then
roms="$roms spapr-rtas"
fi
# Only build s390-ccw bios if we're on s390x and the compiler has -march=z900
if test "$cpu" = "s390x" ; then
write_c_skeleton
if compile_prog "-march=z900" ""; then
roms="$roms s390-ccw"
fi
fi
# Probe for the need for relocating the user-only binary.
if ( [ "$linux_user" = yes ] || [ "$bsd_user" = yes ] ) && [ "$pie" = no ]; then