Add a gpfs variant to openmpi package (#15793)

Open MPI will detect and link against GPFS if it is present
on the system. This variant allows this to be disabled, even
if GPFS is present.

1 files changed, 6 insertions, 0 deletions

diff --git a/var/spack/repos/builtin/packages/openmpi/package.py b/var/spack/repos/builtin/packages/openmpi/package.py
index bb798e7b5f..d0da29d774 100644
--- a/var/spack/repos/builtin/packages/openmpi/package.py
+++ b/var/spack/repos/builtin/packages/openmpi/package.py
@@ -242,6 +242,7 @@ class Openmpi(AutotoolsPackage):
     variant('runpath', default=True, description='Enable wrapper runpath')
     variant('cxx', default=False, description='Enable C++ MPI bindings')
     variant('cxx_exceptions', default=False, description='Enable C++ Exception support')
+    variant('gpfs', default=True, description='Enable GPFS support (if present)')
     # Adding support to build a debug version of OpenMPI that activates
     # Memchecker, as described here:
     #
@@ -410,6 +411,11 @@ class Openmpi(AutotoolsPackage):
         perl = which('perl')
         perl('autogen.pl')
 
+    def setup_build_environment(self, env):
+        if '~gpfs' in self.spec:
+            env.set('ac_cv_header_gpfs_h', 'no')
+            env.set('ac_cv_header_gpfs_fcntl_h', 'no')
+
     def configure_args(self):
         spec = self.spec
         config_args = [