gcc_release (build_sources): Use getconf to get at the number of cores in the…

gcc_release (build_sources): Use getconf to get at the number of cores in the system and pass -jN to gcc_build.

2018-01-25  Richard Biener  <rguenther@suse.de>

	* gcc_release (build_sources): Use getconf to get at the number
	of cores in the system and pass -jN to gcc_build.

From-SVN: r257045

maintainer-scripts/ChangeLog

+2018-01-25  Richard Biener  <rguenther@suse.de>
+
+	* gcc_release (build_sources): Use getconf to get at the number
+	of cores in the system and pass -jN to gcc_build.
+
 2017-10-10  Jakub Jelinek  <jakub@redhat.com>
 
 	* update_version_svn: Ignore the GCC 5 branch.

maintainer-scripts/gcc_release

@@ -209,8 +209,16 @@ EOF
     # on at least one platform.
     inform "Building compiler"
     OBJECT_DIRECTORY=../objdir
+    num_cpus=1
+    if type -p getconf 2>/dev/null; then
+      num_cpus=`getconf _NPROCESSORS_ONLN 2>/dev/null`
+      case "$num_cpus" in
+	'' | 0* | *[!0-9]*) num_cpus=1;;
+      esac
+    fi
     contrib/gcc_build -d ${SOURCE_DIRECTORY} -o ${OBJECT_DIRECTORY} \
-      -c "--enable-generated-files-in-srcdir --disable-multilib" build || \
+      -c "--enable-generated-files-in-srcdir --disable-multilib" \
+      -m "-j$num_cpus" build || \
       error "Could not rebuild GCC"
   fi