[clang] [clang-sycl-linker] Add static archive (.a) support (PR #202829)

[Yury Plyakhin via cfe-commits]

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@@ -24,12 +24,21 @@ def library_path_S : Separate<["--", "-"], "library-path">, Flags<[HelpHidden]>,
 def library_path_EQ : Joined<["--", "-"], "library-path=">, Flags<[HelpHidden]>,
   Alias<library_path>;
 
-def bc_library : Separate<["--", "-"], "bc-library">, MetaVarName<"<name>">,
-  HelpText<"Add LLVM bitcode library <name> (with extension) to the link. A "
-          "relative <name> is resolved against -L paths; an absolute path is "
-          "taken as-is.">;
-def bc_library_EQ : Joined<["--", "-"], "bc-library=">, Flags<[HelpHidden]>,
-  Alias<bc_library>;
+def library : JoinedOrSeparate<["-"], "l">, MetaVarName<"<libname>">,
+  HelpText<"Search for library <libname>">;
+def library_S : Separate<["--", "-"], "library">, Flags<[HelpHidden]>,
+  Alias<library>;
+def library_EQ : Joined<["--", "-"], "library=">, Flags<[HelpHidden]>,
+  Alias<library>;
+
+def whole_archive : Flag<["--", "-"], "whole-archive">,
+  HelpText<"Include all archive members in the link">;
+def no_whole_archive : Flag<["--", "-"], "no-whole-archive">,
+  HelpText<"Only include archive members that resolve undefined symbols (default)">;
+
+def u : JoinedOrSeparate<["-"], "u">, MetaVarName<"<symbol>">,
+  HelpText<"Force undefined symbol during linking">;
+def undefined : JoinedOrSeparate<["--"], "undefined">, Alias<u>;
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YuriPlyakhin wrote:

nit: `--undefined=foo` is also accepted by `ld`. Could you please add this alias also to make the interface closer to standard linker?

https://github.com/llvm/llvm-project/pull/202829