update gcc and fpm version for macos

Author: zoziha

.github/workflows/fpm.yml

@@ -8,13 +8,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest]
-        gcc_v: [12] # Version of GFortran we want to use.
+        os: [ubuntu-latest, macos-12]
+        gcc_v: [11] # Version of GFortran we want to use.
         include:
         - os: ubuntu-latest
           os-arch: linux-x86_64
 
-        - os: macos-11
+        - os: macos-12
           os-arch: macos-x86_64
 
     env:
@@ -25,24 +25,35 @@ jobs:
     - name: Checkout code
       uses: actions/checkout@v1
 
-    - name: Install GFortran macOS
-      if: contains(matrix.os, 'macos')
-      run: |
-        ln -s /usr/local/bin/gfortran-${GCC_V} /usr/local/bin/gfortran
-        which gfortran-${GCC_V}
-        which gfortran
-
     - name: Install GFortran Linux
       if: contains(matrix.os, 'ubuntu')
       run: |
         sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-${GCC_V} 100 \
         --slave /usr/bin/gfortran gfortran /usr/bin/gfortran-${GCC_V} \
         --slave /usr/bin/gcov gcov /usr/bin/gcov-${GCC_V}
-    
+
+    # Backport gfortran shared libraries to version 9 folder. This is necessary because the macOS release of fpm 
+    # 0.10.0 used for bootstrapping has these paths hardcoded in the executable.
+    # See https://github.com/fortran-lang/fpm/pull/1061
+    - name: MacOS patch libgfortran
+      if: contains(matrix.os, 'macos')
+      run: |
+        ln -s /usr/local/bin/gfortran-${GCC_V} /usr/local/bin/gfortran
+        which gfortran-${GCC_V}
+        which gfortran
+        mkdir /usr/local/opt/gcc@10
+        mkdir /usr/local/opt/gcc@10/lib
+        mkdir /usr/local/opt/gcc@10/lib/gcc
+        mkdir /usr/local/opt/gcc@10/lib/gcc/10
+        mkdir /usr/local/lib/gcc/10
+        ln -fs /usr/local/opt/gcc@${GCC_V}/lib/gcc/${GCC_V}/libquadmath.0.dylib /usr/local/opt/gcc@10/lib/gcc/10/libquadmath.0.dylib 
+        ln -fs /usr/local/opt/gcc@${GCC_V}/lib/gcc/${GCC_V}/libgfortran.5.dylib /usr/local/opt/gcc@10/lib/gcc/10/libgfortran.5.dylib
+        ln -fs /usr/local/lib/gcc/${GCC_V}/libgcc_s.1.dylib /usr/local/lib/gcc/10/libgcc_s.1.dylib
+
     - name: Install fpm
-      uses: fortran-lang/setup-fpm@v3
+      uses: fortran-lang/setup-fpm@v5
       with:
-        fpm-version: 'v0.8.2'
+        fpm-version: 'v0.9.0'
 
     - name: Build fftpack
       run: |