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-rw-r--r--var/spack/repos/builtin/packages/perl-forks/package.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/perl-forks/package.py b/var/spack/repos/builtin/packages/perl-forks/package.py
index 7fbd843ac2..16e69a6b6a 100644
--- a/var/spack/repos/builtin/packages/perl-forks/package.py
+++ b/var/spack/repos/builtin/packages/perl-forks/package.py
@@ -19,3 +19,7 @@ class PerlForks(PerlPackage):
depends_on('perl-devel-symdump', type=('build', 'run'))
depends_on('perl-list-moreutils', type=('build', 'run'))
depends_on('perl-sys-sigaction', type=('build', 'run'))
+
+ def setup_build_environment(self, env):
+ if 'perl~threads' in self.spec:
+ env.set('FORKS_SIMULATE_USEITHREADS', '1')