Add support for running tests in parallel to the cmake build system.

Pass appropriate -jN option to ctest (via ARGS variable in the Makefile) to
enable support for running tests in parallel. Similarly to makefile build
system, ctest -j1 mode is enforced even when parallel mode in debhelper is not
explicitly enabled.

Unlike make, CTest does not have "unlimited parallel" setting (-j implies -j1).
So in order to simulate unlimited parallel, allow to fork a huge number of
threads instead.

diff --git a/Debian/Debhelper/Buildsystem/cmake.pm b/Debian/Debhelper/Buildsystem/cmake.pm
index 9e40cb728bdf4559cff429e05810a646b13ec5c5..cddd4b49e8375d3b24769db616dbf39cf823f4b8 100644 (file)
--- a/Debian/Debhelper/Buildsystem/cmake.pm
+++ b/Debian/Debhelper/Buildsystem/cmake.pm
@@ -58,8 +58,12 @@ sub configure {
 sub test {
        my $this=shift;
 
+       # Unlike make, CTest does not have "unlimited parallel" setting (-j implies
+       # -j1). So in order to simulate unlimited parallel, allow to fork a huge
+       # number of threads instead.
+       my $parallel = ($this->get_parallel() > 0) ? $this->get_parallel() : 999;
        $ENV{CTEST_OUTPUT_ON_FAILURE} = 1;
-       return $this->SUPER::test(@_);
+       return $this->SUPER::test(@_, "ARGS+=-j$parallel");
 }
 
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