Rework libomp.a search logic in dune

- Replace fragile cp chain with a robust loop
- Add Ubuntu/Debian /usr/lib/x86_64-linux-gnu/ paths
- Remove touch hack to ensure real library is found
- Added wildcard support for GCC versioned paths

Author: taoeffect

src/quickjs/dune

@@ -53,11 +53,23 @@
 (rule
   (targets libomp.a)
   (action (bash "
-    cp /usr/local/Cellar/libomp/17.0.6/lib/libomp.a . &> /dev/null \
-    || cp /usr/lib/libgomp.a libomp.a &> /dev/null \
-    || cp /usr/lib/gcc/x86_64-linux-gnu/*/libgomp.a libomp.a &> /dev/null \
-    || cp /usr/lib/gcc/aarch64-redhat-linux/15/libgomp.a libomp.a &> /dev/null \
-    || touch libomp.a
+    OUT=\"libomp.a\"
+    PAWTHS=\"
+      /usr/local/Cellar/libomp/17.0.6/lib/libomp.a
+      /usr/lib/x86_64-linux-gnu/libomp.a
+      /usr/lib/x86_64-linux-gnu/libgomp.a
+      /usr/lib/libgomp.a
+      /usr/lib/gcc/x86_64-linux-gnu/*/libgomp.a
+      /usr/lib/gcc/aarch64-redhat-linux/*/libgomp.a
+    \"
+    for p in $PAWTHS; do
+      if ls $p >/dev/null 2>&1; then
+        cp $p \"$OUT\"
+        exit 0
+      fi
+    done
+    echo \"Error: Could not find libomp.a or libgomp.a\" >&2
+    exit 1
   "))
   (mode standard)
 )