👷 added gcc to ci build

.github/workflows/build_run_test.yml

@@ -19,9 +19,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        compiler: [clang]
-        version: [14, 15, 16, 17]
+        compiler: [clang, gcc]
+        version: [12, 13, 14, 15, 16, 17]
         cxx_standard: [20]
+        stdlib: [libstdc++, libc++]
         build_type: [Debug]
         include:
           - compiler: clang
@@ -52,6 +53,37 @@ jobs:
             install: sudo apt update && sudo apt install -y clang-14 libc++-14-dev libc++abi-14-dev
             cxx_flags: "-stdlib=libc++"
             toolchain_root: "/usr/lib/llvm-14"
+          - compiler: gcc
+            toolchain_root: "/usr"
+            cxx_flags: ""
+          - version: 13
+            compiler: gcc
+            install: sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test && sudo apt update && sudo apt-get install -y gcc-13 g++-13
+            cc: "gcc-13"
+            cxx: "g++-13"
+          - version: 12
+            compiler: gcc
+            install: sudo apt update && sudo apt install -y gcc-12
+            cc: "gcc-12"
+            cxx: "g++-12"
+            cxx_flags: ""
+        exclude:
+          - compiler: gcc
+            version: 17
+          - compiler: gcc
+            version: 16
+          - compiler: gcc
+            version: 15
+          - compiler: gcc
+            version: 14
+          - compiler: clang
+            version: 13
+          - compiler: clang
+            version: 12
+          - compiler: gcc
+            stdlib: libc++
+          - compiler: clang
+            stdlib: libstdc++
 
     steps:
       - uses: actions/checkout@v4