workaround problem in rdma-core spackage

- will open PR for spack for long term fix

perf-regression/cooley/run-regression-ofi-rxm.sh

@@ -18,6 +18,7 @@ JOBDIR=$PWD/mochi-regression-job-$$
 # scratch area to clone and build things
 mkdir $SANDBOX
 cp spack-shell.patch  $SANDBOX/
+cp spack-rdma-core-rundir.patch $SANDBOX/
 cp packages.yaml $SANDBOX/
 
 # scratch area for job submission
@@ -36,6 +37,7 @@ git clone https://github.com/pdlfs/mercury-runner.git
 echo "=== BUILD SPACK PACKAGES AND LOAD ==="
 cd $SANDBOX/spack
 patch -p1 < ../spack-shell.patch
+patch -p1 < ../spack-rdma-core-rundir.patch
 export SPACK_SHELL=bash
 . $SANDBOX/spack/share/spack/setup-env.sh
 # put packages file in place in SPACK_ROOT to set our preferences for building

perf-regression/cooley/spack-rdma-core-rundir.patch

+diff --git a/var/spack/repos/builtin/packages/rdma-core/package.py b/var/spack/repos/builtin/packages/rdma-core/package.py
+index 22307be6c..1c6698e7d 100644
+--- a/var/spack/repos/builtin/packages/rdma-core/package.py
++++ b/var/spack/repos/builtin/packages/rdma-core/package.py
+@@ -40,7 +40,12 @@ class RdmaCore(CMakePackage):
+     conflicts('platform=darwin', msg='rdma-core requires FreeBSD or Linux')
+     conflicts('%intel', msg='rdma-core cannot be built with intel (use gcc instead)')
+ 
++# NOTE: specify CMAKE_INSTALL_RUNDIR explicitly to prevent rdma-core from
++#       using the spack staging build dir (which may be a very long file 
++#       system path) as a component in compile-time static strings such as 
++#       IBACM_SERVER_PATH.
+     def cmake_args(self):
+         cmake_args = ["-DCMAKE_INSTALL_SYSCONFDIR=" +
+-                      self.spec.prefix.etc]
++                      self.spec.prefix.etc,
++                      "-DCMAKE_INSTALL_RUNDIR=/var/run"]
+         return cmake_args