Add extra_attributes to pm gcc

Author: altheaden

mache/spack/pm-cpu_gnu_mpich.yaml

@@ -105,6 +105,11 @@ spack:
         - craype-accel-host
         - craype/2.7.30
         - libfabric/1.20.1
+        extra_attributes:
+          compilers:
+            c: /opt/spack/linux-centos8-x86_64/gcc-9.3.0/gcc-11.2.0-bgddrif/bin/gcc
+            cxx: /opt/spack/linux-centos8-x86_64/gcc-9.3.0/gcc-11.2.0-bgddrif/bin/g++
+            fortran: /opt/spack/linux-centos8-x86_64/gcc-9.3.0/gcc-11.2.0-bgddrif/bin/gfortran
       buildable: false
     cray-mpich:
       externals:

mache/spack/pm-gpu_gnugpu_mpich.yaml

@@ -106,6 +106,11 @@ spack:
         - libfabric/1.20.1
         - craype/2.7.30
         - cudatoolkit/12.4
+        extra_attributes:
+          compilers:
+            c: /opt/spack/linux-centos8-x86_64/gcc-9.3.0/gcc-11.2.0-bgddrif/bin/gcc
+            cxx: /opt/spack/linux-centos8-x86_64/gcc-9.3.0/gcc-11.2.0-bgddrif/bin/g++
+            fortran: /opt/spack/linux-centos8-x86_64/gcc-9.3.0/gcc-11.2.0-bgddrif/bin/gfortran
       buildable: false
     cuda:
       externals: