fix: writers & overlays

legacy/writer/writeC.nix

@@ -0,0 +1,35 @@
+{ lib, writers, gcc }:
+name: argsOrScript:
+  if 
+    lib.isAttrs argsOrScript 
+    && !lib.isDerivation argsOrScript
+  then
+    writers.makeBinWriter (
+      argsOrScript
+      // {
+        compileScript = ''
+          # Force gcc to treat the input file as C code
+          ${gcc}/bin/gcc -fsyntax-only -xc $contentPath
+          if [ $? -ne 0 ]; then
+            echo "Syntax check failed"
+            exit 1
+          fi
+          ${gcc}/bin/gcc -xc -o $out $contentPath
+        '';
+      }
+    )
+    name
+  else
+    writers.makeBinWriter {
+      compileScript = ''
+        # Force gcc to treat the input file as C code
+        ${gcc}/bin/gcc -fsyntax-only -xc $contentPath
+        if [ $? -ne 0 ]; then
+          echo "Syntax check failed"
+          exit 1
+        fi
+        ${gcc}/bin/gcc -xc -o $out $contentPath
+      '';
+    }
+    name
+    argsOrScript