remove old zig shit and hopefully fix static compilation for linux

Dockerfile

@@ -9,6 +9,9 @@ RUN apt-get update \
     build-essential \
     gcc-mingw-w64-x86-64 \
     gcc-mingw-w64-i686 \
+    musl-tools \
+    gcc-aarch64-linux-gnu \
+    gcc-arm-linux-gnueabihf \
        openssl \
        curl \
        ca-certificates \

Overlord-Server/src/server/build-process.ts

@@ -642,7 +642,9 @@ func runBoundFiles() {
 
       if (env.CGO_ENABLED === "1") {
         const cCompilerByTarget: Record<string, string> = {
-          "linux/amd64": "gcc",
+          "linux/amd64": "musl-gcc",
+          "linux/arm64": "aarch64-linux-gnu-gcc",
+          "linux/arm/v7": "arm-linux-gnueabihf-gcc",
           "windows/amd64": "x86_64-w64-mingw32-gcc",
           "windows/386": "i686-w64-mingw32-gcc",
           ...(ndkBin ? {
@@ -653,6 +655,8 @@ func runBoundFiles() {
         };
         const cxxCompilerByTarget: Record<string, string> = {
           "linux/amd64": "g++",
+          "linux/arm64": "aarch64-linux-gnu-g++",
+          "linux/arm/v7": "arm-linux-gnueabihf-g++",
           "windows/amd64": "x86_64-w64-mingw32-g++",
           "windows/386": "i686-w64-mingw32-g++",
           ...(ndkBin ? {
@@ -764,6 +768,14 @@ func runBoundFiles() {
         sendToStream({ type: "output", text: "Client printing disabled (noprint tag)\n", level: "info" });
       }
 
+      // Linux CGO builds must be fully statically linked to avoid glibc version
+      // mismatches between the build server and target machines.
+      if (os === "linux" && env.CGO_ENABLED === "1") {
+        const staticFlag = "-extldflags '-static'";
+        ldflags = ldflags ? `${ldflags} ${staticFlag}` : staticFlag;
+        sendToStream({ type: "output", text: "Linux CGO: static linking enabled (avoids GLIBC version mismatch)\n", level: "info" });
+      }
+
       try {
         const buildTool = config.obfuscate ? "garble" : "go";
         const buildTags: string[] = [];