From b1683a1d6a4391ffef6ce12be9aa172d0f4f59bc Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 27 Feb 2014 23:18:42 -0500
Subject: add nofpu subarchs to the sh arch, and properly detect compiler's fpu
 config

---
 configure | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

(limited to 'configure')

diff --git a/configure b/configure
index 1a092f52..572ea640 100755
--- a/configure
+++ b/configure
@@ -421,8 +421,24 @@ fi
 test "$ARCH" = "microblaze" && trycppif __MICROBLAZEEL__ "$t" \
 && SUBARCH=${SUBARCH}el
 
-test "$ARCH" = "sh" && trycppif __BIG_ENDIAN__ "$t" \
-&& SUBARCH=${SUBARCH}eb
+if test "$ARCH" = "sh" ; then
+trycppif __BIG_ENDIAN__ "$t" && SUBARCH=${SUBARCH}eb
+if trycppif __SH_FPU_ANY__ ; then
+# Some sh configurations are broken and replace double with float
+# rather than using softfloat when the fpu is present but only
+# supports single precision. Reject them.
+printf "checking whether compiler's double type is IEEE double... "
+echo 'typedef char dblcheck[(int)sizeof(double)-5];' >> "$tmpc"
+if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
+printf "yes\n"
+else
+printf "no\n"
+fail "$0: error: compiler's floating point configuration is unsupported"
+fi
+else
+SUBARCH=${SUBARCH}-nofpu
+fi
+fi
 
 test "$SUBARCH" \
 && printf "configured for %s variant: %s\n" "$ARCH" "$ARCH$SUBARCH"
-- 
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