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

[Andrzej Warzyński 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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banach-space wrote:

Just a drive-by comment.

> From what i was able to tell when I changed this, the lack of an explicit visibility implied these 4, but perhaps I was mistaken.

This should be verifiable by checking Options.inc file in the build directory _before_ and _after_ change. Options.inc is the C++ files generated from Options.td when building `clangDriver`. Please use that as your guidance.

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