Enabled parallel compilation.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@8188 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/exp-drd/scripts/compile-gcc b/exp-drd/scripts/compile-gcc
index b74ea14..e0c833c 100755
--- a/exp-drd/scripts/compile-gcc
+++ b/exp-drd/scripts/compile-gcc
@@ -14,6 +14,7 @@
 BUILD=${SRC}-build
 TAR=gcc-${GCC_VERSION}.tar.bz2
 PREFIX=$HOME/gcc-${GCC_VERSION}
+export MAKEFLAGS="-j$(($(grep -c '^processor' /proc/cpuinfo) + 1))"
 
 if [ ! -e /usr/include/gmp.h ]; then
   echo "Please install the gmp library development package first."
@@ -48,5 +49,4 @@
   --enable-tls              \
   --prefix=$PREFIX
 
-make -s         || exit $?
-make -s install || exit $?
+time { make -s && make -s install; }