[clang] [flang] [flang][Driver] Support -nostdlib and -nodefaultlibs (PR #108868)

[Mészáros Gergely via cfe-commits]

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@@ -5572,7 +5572,8 @@ def : Flag<["-"], "nocudalib">, Alias<nogpulib>;
 def gpulibc : Flag<["-"], "gpulibc">, Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>,
   HelpText<"Link the LLVM C Library for GPUs">;
 def nogpulibc : Flag<["-"], "nogpulibc">, Visibility<[ClangOption, CC1Option, FlangOption, FC1Option]>;
-def nodefaultlibs : Flag<["-"], "nodefaultlibs">;
+def nodefaultlibs : Flag<["-"], "nodefaultlibs">,
+  Visibility<[ClangOption, FlangOption, CLOption, DXCOption]>;
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Maetveis wrote:

@tarunprabhu, @tblah

Shouldn't these be: `Visibility<[ClangOption, FlangOption]>`, it seems like `clang-cl` is now accepting `-nodefaultlibs` without diagnostic, and it does not do anything (does NOT add /NODEFAULTLIB to link.exe's command line)

https://github.com/llvm/llvm-project/pull/108868