[clang] [Clang][NFC] Introduce `--offloadlib` positive flag for `nogpulib` and alias to `--no-offloadlib` (PR #126567)

[Joseph Huber via cfe-commits]

================
@@ -5618,9 +5618,17 @@ def nogpuinc : Flag<["-"], "nogpuinc">, Group<IncludePath_Group>,
 def nohipwrapperinc : Flag<["-"], "nohipwrapperinc">, Group<IncludePath_Group>,
   HelpText<"Do not include the default HIP wrapper headers and include paths">;
 def : Flag<["-"], "nocudainc">, Alias<nogpuinc>;
-def nogpulib : Flag<["-"], "nogpulib">, MarshallingInfoFlag<LangOpts<"NoGPULib">>,
-  Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>,
-  HelpText<"Do not link device library for CUDA/HIP device compilation">;
+def nogpulib
+    : Flag<["--"], "no-offloadlib">,
+      MarshallingInfoFlag<LangOpts<"NoGPULib">>,
+      Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>,
+      HelpText<"Do not link device library for CUDA/HIP device compilation">;
+def gpulib : Flag<["--"], "offloadlib">,
+             Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>,
+             HelpText<"Link device libraries for GPU device compilation">;
+def : Flag<["-"], "nogpulib">,
+      Alias<nogpulib>,
+      Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>;
----------------
jhuber6 wrote:

Sure, I'll rename it, was just being lazy.

https://github.com/llvm/llvm-project/pull/126567