On Tue, 25 May 2021 16:20:32 +0200 Thomas Huth <th...@redhat.com> wrote:
> 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. Ugh. > > Signed-off-by: Thomas Huth <th...@redhat.com> > --- > configure | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/configure b/configure > index 676239c697..673419ff31 100755 > --- a/configure > +++ b/configure > @@ -5462,7 +5462,7 @@ 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 Do you believe that we should have caught the various clang specialties now? > 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."
