This patch fixes undefined references to softp symbols (__multf3, __fixunstfsi,
__subtf3, etc.) in libgcc_s.so on GNU/Hurd.

Taken from <http://gcc.gnu.org/ml/gcc-patches/2010-04/msg00602.html>, with second
hunk adjusted so that it applies to GCC 4.5.0.

diff --git a/gcc/config.gcc b/gcc/config.gcc
index 9e499cb..9aec392 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -3070,7 +3070,9 @@ case ${target} in
 	i[34567]86-*-darwin* | x86_64-*-darwin*)
 		tmake_file="${tmake_file} i386/t-fprules-softfp soft-fp/t-softfp"
 		;;
-	i[34567]86-*-linux* | x86_64-*-linux* | i[34567]86-*-kfreebsd*-gnu | x86_64-*-kfreebsd*-gnu)
+	i[34567]86-*-linux* | x86_64-*-linux* | \
+	  i[34567]86-*-kfreebsd*-gnu | x86_64-*-kfreebsd*-gnu | \
+	  i[34567]86-*-gnu*)
 		tmake_file="${tmake_file} i386/t-fprules-softfp soft-fp/t-softfp i386/t-linux"
 		;;
 	ia64*-*-linux*)
diff --git a/libgcc/config.host b/libgcc/config.host
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -600,6 +600,7 @@ case ${host} in
 i[34567]86-*-darwin* | x86_64-*-darwin* | \
   i[34567]86-*-kfreebsd*-gnu | x86_64-*-kfreebsd*-gnu | \
   i[34567]86-*-linux* | x86_64-*-linux* | \
+  i[34567]86-*-gnu* | \
   i[34567]86-*-solaris2* | \
   i[34567]86-*-cygwin* | i[34567]86-*-mingw* | x86_64-*-mingw*)
 	if test "${host_address}" = 32; then