Add gcc-linux builds back to release-ci

.github/workflows/nightly-release.yaml

@@ -48,12 +48,17 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os:     [ubuntu-20.04, ubuntu-22.04]
-        mode:   [newlib, linux, musl]
-        target: [rv32gc-ilp32d, rv64gc-lp64d]
+        os:       [ubuntu-20.04, ubuntu-22.04]
+        mode:     [newlib, linux, musl]
+        target:   [rv32gc-ilp32d, rv64gc-lp64d]
+        compiler: [gcc, llvm]
         exclude:
           - mode: musl
             target: rv32gc-ilp32d
+          - mode: newlib
+            compiler: llvm
+          - mode: musl
+            compiler: llvm
     steps:
       - uses: actions/checkout@v2
 
@@ -64,18 +69,17 @@ jobs:
 
       - name: install apt dependencies
         run: sudo ./.github/setup-apt.sh
-      
+
       - name: build toolchain
         run: |
           TARGET_TUPLE=($(echo ${{ matrix.target }} | tr "-" "\n"))
           BUILD_TOOLCHAIN="./configure --prefix=/opt/riscv --with-arch=${TARGET_TUPLE[0]} --with-abi=${TARGET_TUPLE[1]}"
-          if [ "${{ matrix.mode }}" == "linux" ]; then # build toolchain with llvm
+          if [ "${{ matrix.compiler }}" == "llvm" ]; then # build toolchain with llvm
             $BUILD_TOOLCHAIN --enable-llvm --enable-linux
-            sudo make -j $(nproc) all
           else
             $BUILD_TOOLCHAIN
-            sudo make -j $(nproc) ${{ matrix.mode }}
           fi
+          sudo make -j $(nproc) ${{ matrix.mode }}
 
       - name: build qemu
         if: "${{ matrix.mode }}" == "linux"