[llvm] Sketch of build and code changes for llvm shared library build using explicit visibility annotations (PR #96630)

[Reid Kleckner via llvm-commits]

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@@ -815,20 +815,23 @@ endif()
 
 if(MSVC)
   option(LLVM_BUILD_LLVM_C_DYLIB "Build LLVM-C.dll (Windows only)" ON)
-  # Set this variable to OFF here so it can't be set with a command-line
-  # argument.
-  set (LLVM_LINK_LLVM_DYLIB OFF)
   if (BUILD_SHARED_LIBS)
     message(FATAL_ERROR "BUILD_SHARED_LIBS options is not supported on Windows.")
   endif()
-else()
-  option(LLVM_LINK_LLVM_DYLIB "Link tools against the libllvm dynamic library" OFF)
+ else()
   option(LLVM_BUILD_LLVM_C_DYLIB "Build libllvm-c re-export library (Darwin only)" OFF)
-  set(LLVM_BUILD_LLVM_DYLIB_default OFF)
-  if(LLVM_LINK_LLVM_DYLIB OR LLVM_BUILD_LLVM_C_DYLIB)
-    set(LLVM_BUILD_LLVM_DYLIB_default ON)
-  endif()
-  option(LLVM_BUILD_LLVM_DYLIB "Build libllvm dynamic library" ${LLVM_BUILD_LLVM_DYLIB_default})
+endif()
+
+option(LLVM_LINK_LLVM_DYLIB "Link tools against the libllvm dynamic library" OFF)
+set(LLVM_BUILD_LLVM_DYLIB_default OFF)
+if(LLVM_LINK_LLVM_DYLIB OR LLVM_BUILD_LLVM_C_DYLIB)
+  set(LLVM_BUILD_LLVM_DYLIB_default ON)
+endif()
+option(LLVM_BUILD_LLVM_DYLIB "Build libllvm dynamic library" ${LLVM_BUILD_LLVM_DYLIB_default})
+
+if(MSVC)
+  option(LLVM_DYLIB_EXPORT_INLNES "Force inline members of class to be dll exported when
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rnk wrote:

Typo? INLNES vs INLINES

https://github.com/llvm/llvm-project/pull/96630