From: Thomas Huth <th...@redhat.com>
The -msoft-float switch is not available in older versions of Clang.
Since we rely on the compiler to not generate floating point instructions
unexpectedly, we block those old compilers now via a test in the configure
script. Note that for some weird reasons, the Clang compiler only complains
about the missing soft-float support if no other flags are passed via
"-Wl,..." to the linker. So we have to use "compile_object" instead of
"compile_prog" for this check.
Signed-off-by: Thomas Huth <th...@redhat.com>
Message-Id: <20210525142032.156989-1-th...@redhat.com>
Signed-off-by: Cornelia Huck <coh...@redhat.com>
---
configure | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/configure b/configure
index 262ab71802eb..931f6ac01af0 100755
--- a/configure
+++ b/configure
@@ -5424,7 +5424,7 @@ if test "$cpu" = "s390x" ; then
write_c_skeleton
compile_prog "-march=z900" ""
has_z900=$?
- if [ $has_z900 = 0 ] || compile_prog "-march=z10" ""; then
+ if [ $has_z900 = 0 ] || compile_object "-march=z10 -msoft-float -Werror";
then
if [ $has_z900 != 0 ]; then
echo "WARNING: Your compiler does not support the z900!"
echo " The s390-ccw bios will only work with guest CPUs >= z10."
--
2.31.1
