[clang] [llvm] workflows/release-binaries: Enable flang builds on Windows (PR #101344)

[Nikita Popov via llvm-commits]

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@@ -47,11 +47,17 @@ set(LLVM_TARGETS_TO_BUILD Native CACHE STRING "")
 set(CLANG_ENABLE_BOOTSTRAP ON CACHE BOOL "")
 
 set(STAGE1_PROJECTS "clang")
-set(STAGE1_RUNTIMES "")
+
+# Building Flang on Windows requires compiler-rt, so we need to build it in
+# stage1.  compiler-rt is also required for building the Flang tests on
+# macOS.
+set(STAGE1_RUNTIMES "compiler-rt")
 
 if (LLVM_RELEASE_ENABLE_PGO)
   list(APPEND STAGE1_PROJECTS "lld")
-  list(APPEND STAGE1_RUNTIMES "compiler-rt")
+  if (NOT "compiler-rt" IN_LIST STAGE1_RUNTIMES)
+    list(APPEND STAGE1_PROJECTS "compiler-rt")
+  endif()
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nikic wrote:

Why is this bit needed?

https://github.com/llvm/llvm-project/pull/101344