make configure check for unsupported (SPE) powerpc hard-float models
the SPE ABI may be compatible with soft-float, but actually making it
work requires some additional work, so for now it's best to make sure
broken builds don't happen.
diff --git a/configure b/configure
index 9c0762c..213a825 100755
--- a/configure
+++ b/configure
@@ -622,6 +622,8 @@
fi
if test "$ARCH" = "powerpc" ; then
+trycppif "__NO_FPRS__ && !_SOFT_FLOAT" "$t" && fail \
+ "$0: error: compiler's floating point configuration is unsupported"
trycppif _SOFT_FLOAT "$t" && SUBARCH=${SUBARCH}-sf
fi