[clang] [llvm] [Clang] Add env var for nvptx-arch/amdgpu-arch timeout (PR #102521)

[Joel E. Denny via cfe-commits]

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@@ -116,6 +116,16 @@ ToolChain::executeToolChainProgram(StringRef Executable,
   };
 
   std::string ErrorMessage;
+  int SecondsToWait = 60;
+  if (std::optional<std::string> Str =
+          llvm::sys::Process::GetEnv("CLANG_TOOLCHAIN_PROGRAM_TIMEOUT")) {
+    if (!llvm::to_integer(*Str, SecondsToWait))
+      return llvm::createStringError(std::error_code(),
+                                     "CLANG_TOOLCHAIN_PROGRAM_TIMEOUT expected "
+                                     "an integer, got '" +
+                                         *Str + "'");
+    SecondsToWait = std::min(SecondsToWait, 0); // infinite
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jdenny-ornl wrote:

So that negative becomes 0 to mean infinite, that's obviously supposed to be max not min.  Pushed a fix as 7c4eb60c9509c3a750961eac2dbcaad369d911f2.

https://github.com/llvm/llvm-project/pull/102521