gcc: changed to only set ppl and cloog path if both are installed effectively

Note:

Those are needed for the Graphite loop optimization but are optional!

base/gcc/gcc.conf

@@ -128,12 +128,16 @@ var_append extraconfopt ' ' "--with-mpfr-include=$( pkgprefix -r includedir mpfr
 var_append extraconfopt ' ' "--with-mpc=$( pkgprefix -r libmpc )"
 var_append extraconfopt ' ' "--with-mpc-lib=$( pkgprefix -r libdir libmpc )"
 var_append extraconfopt ' ' "--with-mpc-include=$( pkgprefix -r includedir libmpc )"
-var_append extraconfopt ' ' "--with-ppl=$( pkgprefix -r ppl )"
-var_append extraconfopt ' ' "--with-ppl-lib=$( pkgprefix -r libdir ppl )"
-var_append extraconfopt ' ' "--with-ppl-include=$( pkgprefix -r includedir ppl )"
-var_append extraconfopt ' ' "--with-cloog=$( pkgprefix -r cloog )"
-var_append extraconfopt ' ' "--with-cloog-lib=$( pkgprefix -r libdir cloog )"
-var_append extraconfopt ' ' "--with-cloog-include=$( pkgprefix -r includedir cloog )"
+
+# Graphite loop optimization
+if pkginstalled -f cloog && pkginstalled -f ppl; then
+	var_append extraconfopt ' ' "--with-ppl=$( pkgprefix -r ppl )"
+	var_append extraconfopt ' ' "--with-ppl-lib=$( pkgprefix -r libdir ppl )"
+	var_append extraconfopt ' ' "--with-ppl-include=$( pkgprefix -r includedir ppl )"
+	var_append extraconfopt ' ' "--with-cloog=$( pkgprefix -r cloog )"
+	var_append extraconfopt ' ' "--with-cloog-lib=$( pkgprefix -r libdir cloog )"
+	var_append extraconfopt ' ' "--with-cloog-include=$( pkgprefix -r includedir cloog )"
+fi
 
 if atstage toolchain; then
 	bindir="/$prefix/crosscc"