ci: switch Linux from musl-gcc to gcc 16.1.0 (broader C++23 compat)

Author: Sunrisepeak

.github/workflows/ci.yml

@@ -82,13 +82,11 @@ jobs:
         if: runner.os == 'Linux'
         working-directory: tests
         run: |
-          MUSL_VER=$(python3 -c "import json; print(json.load(open('../.xlings.json'))['workspace']['musl-gcc']['linux'])")
-          MUSL_SDK="$HOME/.xlings/data/xpkgs/xim-x-musl-gcc/${MUSL_VER}"
+          GCC_VER=$(python3 -c "import json; print(json.load(open('../.xlings.json'))['workspace']['gcc']['linux'])")
+          GCC_SDK="$HOME/.xlings/data/xpkgs/xim-x-gcc/${GCC_VER}"
           xmake f -P . -y -vv \
-            --sdk="${MUSL_SDK}" \
-            --cross=x86_64-linux-musl- \
-            --cc="${MUSL_SDK}/bin/x86_64-linux-musl-gcc" \
-            --cxx="${MUSL_SDK}/bin/x86_64-linux-musl-g++"
+            --cc="${GCC_SDK}/bin/gcc" \
+            --cxx="${GCC_SDK}/bin/g++"
 
       - name: Configure (macos)
         if: runner.os == 'macOS'

.xlings.json

@@ -1,7 +1,7 @@
 {
   "workspace": {
     "xmake": "3.0.7",
-    "musl-gcc": { "linux": "15.1.0" },
+    "gcc": { "linux": "16.1.0" },
     "llvm": { "macosx": "20.1.7" }
   }
 }