Package: dpkg-dev
Version: 1.17.9
Severity: wishlist
Tags: patch
Hi,
Recently I've watched openSUSE conference video and they uses %{?_smp_flags}
rpm macro to detect multi CPU cores to be enabled to do parallel building
package.
http://presentations.nordisch.org/packaging-oSC2014/#/13
Then, I'd like to introduce such feature (not manually specify -j<job number>,
but automatically uses all CPUs and run multiple make) to dpkg-buildpackage,
patch attached.
Pros)
- Automatically use all CPU cores to build package, faster build.
Cons)
- It may introduce FTBFS to some packages (e.g. Bug#694726), but it should
be fixed, right? ;)
diff --git a/scripts/dpkg-buildpackage.pl b/scripts/dpkg-buildpackage.pl
index ec40e7d..adc7acd 100755
--- a/scripts/dpkg-buildpackage.pl
+++ b/scripts/dpkg-buildpackage.pl
@@ -129,6 +129,7 @@ my $signcommand;
my $noclean;
my $cleansource;
my $parallel;
+my $smp;
my $checkbuilddep = 1;
my @checkbuilddep_opts;
my @source_opts;
@@ -356,6 +357,12 @@ if (defined $parallel) {
$ENV{MAKEFLAGS} .= " -j$parallel";
$build_opts->set('parallel', $parallel);
$build_opts->export();
+} else {
+ $smp = int `getconf _NPROCESSORS_ONLN`;
+ $ENV{MAKEFLAGS} ||= '';
+ $ENV{MAKEFLAGS} .= " -j$smp";
+ $build_opts->set('parallel', $smp);
+ $build_opts->export();
}
set_build_profiles(@build_profiles) if @build_profiles;
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