[clang] [MinGW] Fix the regression caused by commit 592e935e115ffb451eb9b782376711dab6558fe0, that, in MinGW, Clang can't be built by system Clang 15.0.4. (PR #74982)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: 徐持恒 Xu Chiheng (xu-chiheng)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/74982.diff


1 Files Affected:

- (modified) clang/include/clang/Interpreter/Value.h (+2-2) 


``````````diff
diff --git a/clang/include/clang/Interpreter/Value.h b/clang/include/clang/Interpreter/Value.h
index c380cd91550def..46e827f3ec283d 100644
--- a/clang/include/clang/Interpreter/Value.h
+++ b/clang/include/clang/Interpreter/Value.h
@@ -52,7 +52,8 @@ class ASTContext;
 class Interpreter;
 class QualType;
 
-#if defined(_WIN32)
+#if defined(LLVM_BUILD_LLVM_DYLIB) || defined(LLVM_BUILD_SHARED_LIBS)
+#if defined(_WIN32) && !(defined(__CYGWIN__) || defined(__MINGW32__))
 // REPL_EXTERNAL_VISIBILITY are symbols that we need to be able to locate
 // at runtime. On Windows, this requires them to be exported from any of the
 // modules loaded at runtime. Marking them as dllexport achieves this; both
@@ -63,7 +64,6 @@ class QualType;
 // statically linked into an EXE, it makes sure that they're exported.
 #define REPL_EXTERNAL_VISIBILITY __declspec(dllexport)
 #elif __has_attribute(visibility)
-#if defined(LLVM_BUILD_LLVM_DYLIB) || defined(LLVM_BUILD_SHARED_LIBS)
 #define REPL_EXTERNAL_VISIBILITY __attribute__((visibility("default")))
 #else
 #define REPL_EXTERNAL_VISIBILITY

``````````

</details>


https://github.com/llvm/llvm-project/pull/74982