gcc: reimplemented Graphite and *at_exit

base/gcc/gcc.conf

@@ -75,7 +75,16 @@ hook_add preconf 5 "mkdir -p objdir; cd objdir"
 
 configscript="../configure"
 
-var_append confopt ' ' "--enable-__cxa_atexit"
+# See http://gcc.gnu.org/gcc-3.2/c++-abi.html
+# and http://www.codesourcery.com/cxx-abi/.
+if [ "$SDECFG_CROSSBUILD" = 1 ]; then
+	# FIXME: stage 1 c++ packages fail if this is enabled
+	var_append confopt ' ' "--disable-__cxa_atexit"
+elif [ "$arch_machine" != "i386" ]; then
+	var_append confopt ' ' "--enable-__cxa_atexit"
+else
+	var_append confopt ' ' "--disable-__cxa_atexit"
+fi
 
 # we might build a SVN or prereleases, disable checking
 var_append confopt ' ' '--disable-checking'
@@ -174,6 +183,19 @@ libstdcpp_build() {
 	configscript=../configure
 }
 
+# Graphite loop optimization
+if pkginstalled -f cloog && pkginstalled -f ppl; then
+	# use the cloog-isl backend
+	var_append extraconfopt ' ' "--enable-cloog-backend=isl"
+	var_append extraconfopt ' ' "--with-cloog=$( pkgprefix -r cloog )"
+	var_append extraconfopt ' ' "--with-cloog-lib=$( pkgprefix -r libdir cloog )"
+	var_append extraconfopt ' ' "--with-cloog-include=$( pkgprefix -r includedir cloog )"
+	# even when using the cloog-isl backend ppl is still needed to build gcc
+	var_append extraconfopt ' ' "--with-ppl=$( pkgprefix -r ppl )"
+	var_append extraconfopt ' ' "--with-ppl-lib=$( pkgprefix -r libdir ppl )"
+	var_append extraconfopt ' ' "--with-ppl-include=$( pkgprefix -r includedir ppl )"
+fi
+
 if atstage cross; then
 	# for gcc versions 4.3 and upwards we have to explicitely specifiy the
 	# target architecture at cross-compiling stage

base/gcc/gcc.desc

@@ -39,5 +39,4 @@
 [P] X 012--5---9 102.300
 
 [D] 1408594922 gcc-5-20160209.tar.bz2 ftp://gcc.gnu.org/pub/gcc/snapshots/5-20160209/
-[D] 2750021927 isl-0.14.tar.bz2 ftp://gcc.gnu.org/pub/gcc/infrastructure/ 
 [D] 271646925 ecj-4.5.jar ftp://sourceware.org/pub/java/