gcc@10 because 9 misses g++-9

Signed-off-by: Harmen Stoppels <harmenstoppels@gmail.com>

Author: haampie

.github/workflows/build.yaml

@@ -29,6 +29,9 @@ jobs:
     - name: Find compilers
       run: spack -e . compiler find
 
+    - name: Show packages config
+      run: spack -e . config get packages
+
     - name: Concretize (fresh)
       run: spack -e . -v concretize --fresh
       if: ${{ github.event.inputs.name == 'true' }}

README.md

@@ -4,7 +4,7 @@ This repo provides a buildcache to speed up Spack in your GitHub Actions.
 
 Currently it provides binaries from Spack `develop` for
 
-- `%gcc@9 ^glibc@2.35 target=x86_64_v3`
+- `%gcc@10 ^glibc@2.35 target=x86_64_v3`
 
 which are compatible with
 

spack.yaml

@@ -30,11 +30,11 @@ spack:
     all:
       require: target=x86_64_v3
     c:
-      prefer: [gcc@9]
+      prefer: [gcc@10]
     cxx:
-      prefer: [gcc@9]
+      prefer: [gcc@10]
     fortran:
-      prefer: [gcc@9]
+      prefer: [gcc@10]
   mirrors:
     github-actions-buildcache:
       url: oci://ghcr.io/spack/github-actions-buildcache