build: make-debs.sh NPROC overrides make -j

Building a package is disk intensive and running make -j8 on a machine
with a spinner can actually be slower than make. NPROC=1 make-deb.sh
overrides the default value of make -jX.

Signed-off-by: Loic Dachary <ldachary@redhat.com>

diff --git a/make-debs.sh b/make-debs.sh
index 535b27b929bffb3e675134c3ecc796d5418bea65..b8d3e46489cd2c2e05e9d8ec8c810b0462efef69 100755 (executable)
--- a/make-debs.sh
+++ b/make-debs.sh
@@ -80,7 +80,11 @@ fi
 # b) do not sign the packages
 # c) use half of the available processors
 #
-PATH=/usr/lib/ccache:$PATH dpkg-buildpackage -j$(($(nproc) / 2)) -uc -us
+: ${NPROC:=$(($(nproc) / 2))}
+if test $NPROC -gt 1 ; then
+    j=-j${NPROC}
+fi
+PATH=/usr/lib/ccache:$PATH dpkg-buildpackage $j -uc -us
 cd ../..
 mkdir -p $codename/conf
 cat > $codename/conf/distributions <<EOF