From a519545ed158018283bf5617324df44a139ccf6d Mon Sep 17 00:00:00 2001
From: Tony Butler <spudz76@gmail.com>
Date: Wed, 19 Sep 2018 09:50:35 -0600
Subject: [PATCH] Adjust MSVC detection/support in CMakeLists.txt

---
 CMakeLists.txt | 37 +++++++++++++++++++++++++------------
 1 file changed, 25 insertions(+), 12 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a642b385d..e7944d71a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,7 +39,13 @@ set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "${BUILD_TYPE}")
 set(XMR-STAK_COMPILE "native" CACHE STRING "select CPU compute architecture")
 set_property(CACHE XMR-STAK_COMPILE PROPERTY STRINGS "native;generic")
 if(XMR-STAK_COMPILE STREQUAL "native")
-    if(NOT CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+    if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+        #intentionally appending due to how MSVC collects options
+        # this forces these three flags to override any previous
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /Ox /GL /EHsc")
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /Ox /GL /EHsc")
+    else()
+        # GCC and all other compilers
         set(CMAKE_CXX_FLAGS "-march=native -mtune=native ${CMAKE_CXX_FLAGS}")
         set(CMAKE_C_FLAGS "-march=native -mtune=native ${CMAKE_C_FLAGS}")
     endif()
@@ -142,9 +148,11 @@ if(CUDA_ENABLE)
                 set(CLANG_BUILD_FLAGS "${CLANG_BUILD_FLAGS} --cuda-gpu-arch=sm_${CUDA_ARCH_ELEM}")
             endforeach()
         elseif(CUDA_COMPILER STREQUAL "nvcc")
-            # add c++11 for cuda
-            if(NOT CMAKE_CXX_FLAGS MATCHES "-std=c\\+\\+11")
-                set(CUDA_NVCC_FLAGS "${CUDA_NVCC_FLAGS} -std=c++11")
+            if(NOT CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+                # add c++11 for cuda, except Windows
+                if(NOT CMAKE_CXX_FLAGS MATCHES "-std=c\\+\\+11")
+                    set(CUDA_NVCC_FLAGS "${CUDA_NVCC_FLAGS} -std=c++11")
+                endif()
             endif()
 
             # avoid that nvcc in CUDA 8 complains about sm_20 pending removal
@@ -383,18 +391,18 @@ endif()
 
 # Get the current working branch
 execute_process(
-  COMMAND git rev-parse --abbrev-ref HEAD
-  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
-  OUTPUT_VARIABLE GIT_BRANCH
-  OUTPUT_STRIP_TRAILING_WHITESPACE
+    COMMAND git rev-parse --abbrev-ref HEAD
+    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    OUTPUT_VARIABLE GIT_BRANCH
+    OUTPUT_STRIP_TRAILING_WHITESPACE
 )
 
 # Get the latest abbreviated commit hash of the working branch
 execute_process(
-  COMMAND git log -1 --format=%h
-  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
-  OUTPUT_VARIABLE GIT_COMMIT_HASH
-  OUTPUT_STRIP_TRAILING_WHITESPACE
+    COMMAND git log -1 --format=%h
+    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    OUTPUT_VARIABLE GIT_COMMIT_HASH
+    OUTPUT_STRIP_TRAILING_WHITESPACE
 )
 
 if(NOT GIT_COMMIT_HASH STREQUAL "")
@@ -417,6 +425,10 @@ include_directories(BEFORE .)
 set (CMAKE_POSITION_INDEPENDENT_CODE TRUE)
 
 if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+    # optimize linking
+    set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${CMAKE_STATIC_LINKER_FLAGS_RELEASE} /LTCG")
+    set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG /INCREMENTAL:NO /OPT:REF")
+    set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG /INCREMENTAL:NO /OPT:REF")
     # remove warnings that f_open() is not save and f_open_s should be used
     add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
     # disable min define to allow usage of std::min
@@ -560,3 +572,4 @@ else()
     # this rule is used if the install prefix is the build directory
     install(CODE "MESSAGE(\"xmr-stak installed to folder 'bin'\")")
 endif()
+# vim: et sw=4 sts=4 ts=4: