[cmake] Emit an error for -DBUILD_SHARED_LIBS=ON on Windows

Summary:
The BUILD_SHARED_LIBS=ON build fails on Windows, so prevent users from
enabling it.

Reviewers: beanz, smeenai, compnerd, phosek

Reviewed By: beanz

Subscribers: mgorny, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70161

diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index 2a6ec2b7549da335d53de604cfe3a5c95972a933..b1a51b332ff0d40b65838cd62a3a6b52693ddd08 100644 (file)
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -574,6 +574,9 @@ if(MSVC)
   # 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)
   option(LLVM_BUILD_LLVM_C_DYLIB "Build libllvm-c re-export library (Darwin only)" OFF)