cmake: preliminary support for clang with vc++ codegen

4 files changed, 137 insertions, 6 deletions

diff --git a/cmake/msvc-clang.cmake b/cmake/msvc-clang.cmake
new file mode 100644
index 00000000..419a3652
--- /dev/null
+++ b/cmake/msvc-clang.cmake
@@ -0,0 +1,131 @@
+# this file only serves as toolchain file when specified so explicitly
+# when building the software. from repository's root directory:
+# mkdir build && cmake -DCMAKE_TOOLCHAIN_FILE=$(pwd)/../cmake/msvc.cmake build/
+
+include("${CMAKE_CURRENT_LIST_DIR}/opentrack-policy.cmake")
+
+SET(CMAKE_SYSTEM_NAME Windows)
+SET(CMAKE_SYSTEM_VERSION 1)
+
+# search for programs in the host directories
+SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+# don't poison with system compile-time data
+SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+
+set(cc "")
+
+set(cc "${cc} -W3 -Wall -Wextra -Wno-unused-command-line-argument -Wno-missing-braces")
+set(cc "${cc} -Wno-inconsistent-missing-override")
+set(cc "${cc} -Wno-return-type-c-linkage")
+
+set(cc "${cc} -Xclang -std=c++14 -Xclang -fms-compatibility-version=1912 -fms-compatibility")
+
+set(cc "${cc} -U __clang__ -U__clang")
+
+set(cc "${cc} -O3")
+set(cc "${cc} -Xclang -O3 -Xclang -flto -Qvec -Oit -Oy -Ob2 -fp:fast -GS- -GF -GL -Gw -Gy -Gm -Zc:inline")
+set(cc "${cc} -Zo -FS -Zc:threadSafeInit -arch:SSE2 -D_HAS_EXCEPTIONS=0")
+set(cc "${cc} -bigobj")
+#set(cc "${cc} -Wno-unknown-argument -Wno-unknown-pragmas -Wno-invalid-noreturn")
+
+#set(CMAKE_CXX_SIMULATE_ID "MSVC" CACHE INTERNAL "" FORCE)
+#set(CMAKE_C_SIMULATE_ID "MSVC" CACHE INTERNAL "" FORCE)
+#set(CMAKE_CXX_SIMULATE_VERSION 19.0 CACHE INTERNAL "" FORCE)
+#set(CMAKE_C_SIMULATE_VERSION 19.0 CACHE INTERNAL "" FORCE)
+
+#set(CMAKE_INCLUDE_SYSTEM_FLAG_C "-Xclang -isystem")
+#set(CMAKE_INCLUDE_SYSTEM_FLAG_CXX "-Xclang -isystem")
+
+#set(CMAKE_C_USE_RESPONSE_FILE_FOR_INCLUDES TRUE)
+#set(CMAKE_CXX_USE_RESPONSE_FILE_FOR_INCLUDES TRUE)
+
+set(CMAKE_CXX_COMPILER "d:/llvm/msbuild-bin/cl.exe")
+set(CMAKE_C_COMPILER "d:/llvm/msbuild-bin/cl.exe")
+
+#set(CMAKE_CXX_COMPILER_ID "MSVC" CACHE INTERNAL "" FORCE)
+#set(CMAKE_C_COMPILER_ID "MSVC" CACHE INTERNAL "" FORCE)
+
+#set(CMAKE_CXX_COMPILER_VERSION "19.0" CACHE INTERNAL "" FORCE)
+#set(CMAKE_C_COMPILER_VERSION "19.0" CACHE INTERNAL "" FORCE)
+
+#set(CMAKE_VS_PLATFORM_TOOLSET "v150_clang_4_0")
+
+set(CMAKE_CXX_FLAGS_RELEASE_INIT " ")
+set(CMAKE_C_FLAGS_RELEASE_INIT " ")
+
+set(CMAKE_CXX_STANDARD_REQUIRED FALSE)
+set(CMAKE_CXX_EXTENSIONS FALSE)
+
+set(warns_ "")
+
+set(warns-disable 4530 4577 4789 4244 4702 4530 4244 4127 4458 4456 4251)
+
+foreach(i ${warns-disable})
+    set(warns_ "${warns_} -wd${i}")
+endforeach()
+if(CMAKE_PROJECT_NAME STREQUAL "opentrack")
+    #C4263 - member function does not override any base class virtual member function
+    #C4264 - no override available for virtual member function from base class, function is hidden
+    #C4265 - class has virtual functions, but destructor is not virtual
+    #C4266 - no override available for virtual member function from base type, function is hidden
+    #C4928 - illegal copy-initialization, more than one user-defined conversion has been implicitly applied
+
+    set(warns 4263 4264 4266 4928)
+    set(warns-noerr 4265)
+
+    foreach(i ${warns})
+        set(warns_ "${warns_} -w1${i} -we${i}")
+    endforeach()
+
+    foreach(i ${warns-noerr})
+        set(warns_ "${warns_} -w1${i}")
+    endforeach()
+    set(cc "${cc} -GR-")
+endif()
+
+set(base-cflags "${warns_} -MT -Zi -cgthreads8 -W4")
+
+set(_CFLAGS "${base-cflags}")
+set(_CXXFLAGS "${base-cflags}")
+set(_CFLAGS_RELEASE "${cc}")
+set(_CFLAGS_DEBUG "-GS -sdl -Gs -guard:cf")
+set(_CXXFLAGS_RELEASE "${cc}")
+set(_CXXFLAGS_DEBUG "${_CFLAGS_DEBUG}")
+
+set(_LDFLAGS_COMMON "-ignore:4217 -ignore:4221")
+set(_LDFLAGS "-machine:X86 -DEBUG ${_LDFLAGS_COMMON}")
+set(_LDFLAGS_RELEASE "-OPT:REF -OPT:ICF=10")
+set(_LDFLAGS_DEBUG "")
+
+set(_LDFLAGS_STATIC "-machine:X86 ${_LDFLAGS_COMMON}")
+set(_LDFLAGS_STATIC_RELEASE "")
+set(_LDFLAGS_STATIC_DEBUG "")
+
+foreach(j C CXX)
+    foreach(i "" _DEBUG _RELEASE)
+        set(CMAKE_${j}_FLAGS${i} "${CMAKE_${j}_FLAGS${i}} ${_${j}FLAGS${i}}")
+    endforeach()
+    set(CMAKE_${j}_FLAGS "${CMAKE_${j}_FLAGS} ${_${j}FLAGS}")
+endforeach()
+
+foreach(j "" _DEBUG _RELEASE)
+    foreach(i MODULE EXE SHARED)
+        set(CMAKE_${i}_LINKER_FLAGS${j} "${_LDFLAGS${j}} ${CMAKE_${i}_LINKER_FLAGS${j}}")
+    endforeach()
+endforeach()
+
+set(CMAKE_STATIC_LINKER_FLAGS "${_LDFLAGS_STATIC} ${CMAKE_STATIC_LINKER_FLAGS}")
+set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${_LDFLAGS_STATIC_RELEASE} ${CMAKE_STATIC_LINKER_FLAGS_RELEASE}")
+set(CMAKE_STATIC_LINKER_FLAGS_DEBUG "${_LDFLAGS_STATIC_DEBUG} ${CMAKE_STATIC_LINKER_FLAGS_DEBUG}")
+
+set(CMAKE_RC_FLAGS "-nologo -DWIN32")
+
+if(NOT CMAKE_INSTALL_PREFIX)
+    set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" CACHE PATH "" FORCE)
+endif()
+
+if(NOT CMAKE_BUILD_TYPE)
+    set(CMAKE_BUILD_TYPE "RELEASE" CACHE STRING "" FORCE)
+endif()
+
diff --git a/cmake/opentrack-boilerplate.cmake b/cmake/opentrack-boilerplate.cmake
index 70ded904..0ed90867 100644
--- a/cmake/opentrack-boilerplate.cmake
+++ b/cmake/opentrack-boilerplate.cmake
@@ -85,7 +85,7 @@ function(otr_compat target)
     set(l-props)
     get_property(linker-lang TARGET ${target} PROPERTY LINKER_LANGUAGE)
 
-    if(CMAKE_COMPILER_IS_GNUCXX)
+    if(CMAKE_COMPILER_IS_GNUCXX AND NOT MSVC)
         set(c-props " -fvisibility=hidden")
         if(NOT is-c-only)
             if(NOT WIN32 OR NOT ".${CMAKE_CXX_COMPILER_ID}" STREQUAL ".Clang")
@@ -94,7 +94,7 @@ function(otr_compat target)
         endif()
     endif()
 
-    if(CMAKE_COMPILER_IS_GNUCXX AND NOT APPLE)
+    if(CMAKE_COMPILER_IS_GNUCXX AND NOT APPLE AND NOT MSVC)
         set(l-props "-Wl,--as-needed")
     endif()
 
diff --git a/cmake/opentrack-platform.cmake b/cmake/opentrack-platform.cmake
index 7882196e..3e1c1b3f 100644
--- a/cmake/opentrack-platform.cmake
+++ b/cmake/opentrack-platform.cmake
@@ -35,7 +35,7 @@ if(APPLE)
     endif()
 endif()
 
-if(MSVC AND MSVC_VERSION LESS "1900")
+if(MSVC AND MSVC_VERSION LESS "1900" AND NOT ".${CMAKE_CXX_COMPILER_ID}" STREQUAL ".Clang")
     message(FATAL_ERROR "Visual Studio too old. Use Visual Studio 2015 Update 3 or newer.")
 endif()
 
@@ -69,7 +69,7 @@ if(MSVC)
 
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Zi -std:c++14")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Zi")
-    if(MSVC AND opentrack-64bit)
+    if(opentrack-64bit)
         set(ent "-HIGHENTROPYVA")
     else()
         set(ent "")
@@ -81,7 +81,7 @@ if(MSVC)
 endif()
 
 if(WIN32)
-  if(CMAKE_COMPILER_IS_GNUCXX)
+  if(CMAKE_COMPILER_IS_GNUCXX AND NOT MSVC)
     set(CMAKE_RC_COMPILER_INIT i686-w64-mingw32-windres)
     set(CMAKE_RC_COMPILE_OBJECT "<CMAKE_RC_COMPILER> --use-temp-file -O coff <DEFINES> -i <SOURCE> -o <OBJECT>")
   endif()
diff --git a/cmake/opentrack-policy.cmake b/cmake/opentrack-policy.cmake
index 98f504a1..e4fded7a 100644
--- a/cmake/opentrack-policy.cmake
+++ b/cmake/opentrack-policy.cmake
@@ -1,4 +1,4 @@
-foreach(k CMP0020 CMP0022 CMP0058 CMP0028 CMP0042 CMP0063 CMP0053 CMP0011 CMP0054)
+foreach(k CMP0020 CMP0022 CMP0058 CMP0028 CMP0042 CMP0063 CMP0053 CMP0011 CMP0054 CMP0012)
     if(POLICY ${k})
         cmake_policy(SET ${k} NEW)
     endif()