Do not set CMAKE_MSVC_RUNTIME_LIBRARY if it's already set

src/cmake_generator.cpp

@@ -731,23 +731,6 @@ void generate_cmake(const char *path, const parser::Project *parent_project) {
     if (is_root_project) {
         cmd("cmake_minimum_required")("VERSION", project.cmake_version).endl();
 
-        if (project.project_msvc_runtime != parser::msvc_last) {
-            comment("Enable support for MSVC_RUNTIME_LIBRARY");
-            cmd("cmake_policy")("SET", "CMP0091", "NEW");
-
-            switch (project.project_msvc_runtime) {
-            case parser::msvc_dynamic:
-                cmd("set")("CMAKE_MSVC_RUNTIME_LIBRARY", "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL");
-                break;
-            case parser::msvc_static:
-                cmd("set")("CMAKE_MSVC_RUNTIME_LIBRARY", "MultiThreaded$<$<CONFIG:Debug>:Debug>");
-                break;
-            default:
-                break;
-            }
-            endl();
-        }
-
         // clang-format on
         if (!project.allow_in_tree) {
             // clang-format off
@@ -778,6 +761,26 @@ void generate_cmake(const char *path, const parser::Project *parent_project) {
         cmd("endif")().endl();
         // clang-format on
 
+        if (project.project_msvc_runtime != parser::msvc_last) {
+            comment("Enable support for MSVC_RUNTIME_LIBRARY");
+            cmd("cmake_policy")("SET", "CMP0091", "NEW");
+
+            // clang-format off
+            cmd("if")("NOT", "DEFINED", "CMAKE_MSVC_RUNTIME_LIBRARY");
+                switch (project.project_msvc_runtime) {
+                case parser::msvc_dynamic:
+                    cmd("set")("CMAKE_MSVC_RUNTIME_LIBRARY", "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL");
+                    break;
+                case parser::msvc_static:
+                    cmd("set")("CMAKE_MSVC_RUNTIME_LIBRARY", "MultiThreaded$<$<CONFIG:Debug>:Debug>");
+                    break;
+                default:
+                    break;
+                }
+            cmd("endif")().endl();
+            // clang-format on
+        }
+
         fs::path cmkr_include(project.cmkr_include);
         if (!project.cmkr_include.empty() && !fs::exists(cmkr_include) && cmkr_include.is_relative()) {
             create_file(cmkr_include, resources::cmkr);