Force shared CRT on Windows if building tests and Shaderc

Change-Id: I7a34d4409466fe3a823c69bb240784687d2a678a

CMakeLists.txt

@@ -59,14 +59,6 @@ endif()
 
 set(CMAKE_CXX_STANDARD 17)
 
-if(WIN32)
-  # On Windows, CMake by default compiles with the shared CRT.
-  # Default it to the static CRT.
-  option(AMBER_ENABLE_SHARED_CRT
-         "Amber: Use the shared CRT with MSVC instead of the static CRT"
-	 ${AMBER_ENABLE_SHARED_CRT})
-endif(WIN32)
-
 if (${AMBER_SKIP_SPIRV_TOOLS})
   set(AMBER_ENABLE_SPIRV_TOOLS FALSE)
   set(AMBER_ENABLE_SHADERC FALSE)
@@ -120,6 +112,21 @@ if (${AMBER_USE_CLSPV} OR ${AMBER_ENABLE_SWIFTSHADER})
   enable_language(ASM)
 endif()
 
+if(WIN32 AND ${AMBER_ENABLE_SHADERC} AND ${AMBER_ENABLE_TESTS})
+  set(__enable_shared_crt_default ON)
+else()
+  set(__enable_shared_crt_default ${AMBER_ENABLE_SHARED_CRT})
+endif()
+
+if(WIN32)
+  # On Windows, CMake by default compiles with the shared CRT.
+  # Default it to the static CRT.
+  option(AMBER_ENABLE_SHARED_CRT
+         "Amber: Use the shared CRT with MSVC instead of the static CRT"
+	 ${AMBER_ENABLE_SHARED_CRT})
+endif(WIN32)
+
+
 message(STATUS "Using python3")
 find_package(Python3 REQUIRED)
 

third_party/CMakeLists.txt

@@ -14,7 +14,7 @@
 
 if (${AMBER_ENABLE_TESTS})
   if (${AMBER_ENABLE_SHARED_CRT})
-    set(gtest_force_shared_crt ON)
+    set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
   endif()
   add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/googletest EXCLUDE_FROM_ALL)
 endif()