Add extra_attributes to frontier gcc

Author: altheaden

mache/spack/frontier_gnu_mpich.yaml

@@ -107,6 +107,11 @@ spack:
         - gcc/12.2.0
         - craype/2.7.19
         - libfabric/1.15.2.0
+        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/frontier_gnugpu_mpich.yaml

@@ -107,6 +107,11 @@ spack:
         - gcc/11.2.0
         - craype/2.7.19
         - libfabric/1.15.2.0
+        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: