[clang] [clang-tools-extra] [compiler-rt] [PGO] Exposing PGO's Counter Reset and File Dumping APIs (PR #76471)

[Qiongsi Wu via cfe-commits]

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@@ -0,0 +1,16 @@
+// Test the linker feature that treats undefined weak symbols as null values.
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+// RUN: %clang_pgogen -o %t %s
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qiongsiwu wrote:

Ah no worries! I actually tried running this on AIX and the test is unsupported. I think compiler-rt [checks](https://github.com/llvm/llvm-project/blob/d933b88b71b00461815667d7cd0bb2fecd8606db/compiler-rt/test/profile/Linux/lit.local.cfg.py#L45) to see if the host is Linux before running the tests in the `Linux` folder. 

https://github.com/llvm/llvm-project/pull/76471