cmake: link release builds statically against run-time library on windows (use /MT...

[oota-llvm.git] / cmake / modules / HandleLLVMOptions.cmake

diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
index b49d6496125030778e47712fc4075cbc0bfbdcbc..ff71c00544fdab85a51c4bce748d48f758552f64 100644 (file)
--- a/cmake/modules/HandleLLVMOptions.cmake
+++ b/cmake/modules/HandleLLVMOptions.cmake
@@ -5,9 +5,12 @@
 include(AddLLVMDefinitions)
 include(CheckCCompilerFlag)
 include(CheckCXXCompilerFlag)
+include(LLVMProcessSources)
 
 if( CMAKE_COMPILER_IS_GNUCXX )
   set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
+elseif( MSVC )
+  set(LLVM_COMPILER_IS_GCC_COMPATIBLE OFF)
 elseif( "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
   set(LLVM_COMPILER_IS_GCC_COMPATIBLE ON)
 endif()
@@ -22,8 +25,13 @@ if( LLVM_ENABLE_ASSERTIONS )
   if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
     add_definitions( -UNDEBUG )
     # Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
-    string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " "
-      CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
+    set(REGEXP_NDEBUG "(^| )[/-]D *NDEBUG($| )")\r
+    string (REGEX REPLACE "${REGEXP_NDEBUG}" " "\r
+      CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")\r
+    string (REGEX REPLACE "${REGEXP_NDEBUG}" " "\r
+      CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")\r
+    string (REGEX REPLACE "${REGEXP_NDEBUG}" " "\r
+      CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}")\r
   endif()
 else()
   if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELEASE" )
@@ -33,6 +41,15 @@ else()
   endif()
 endif()
 
+if(MSVC)
+  # Link release builds against the static runtime.
+  foreach(flag CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_RELWITHDEBINFO
+      CMAKE_C_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELEASE
+      CMAKE_CXX_FLAGS_RELWITHDEBINFO CMAKE_CXX_FLAGS_MINSIZEREL)
+    llvm_replace_compiler_option("${flag}" "/MD" "/MT")
+  endforeach()
+endif()  
+
 if(WIN32)
   if(CYGWIN)
     set(LLVM_ON_WIN32 0)
@@ -151,6 +168,15 @@ endif()
 if( MSVC )
   include(ChooseMSVCCRT)
 
+  if( NOT (${CMAKE_VERSION} VERSION_LESS 2.8.11) )
+    # set stack reserved size to ~10MB
+    # CMake previously automatically set this value for MSVC builds, but the
+    # behavior was changed in CMake 2.8.11 (Issue 12437) to use the MSVC default
+    # value (1 MB) which is not enough for us in tasks such as parsing recursive
+    # C++ templates in Clang.
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /STACK:10000000")
+  endif()
+
   if( MSVC10 )
     # MSVC 10 will complain about headers in the STL not being exported, but
     # will not complain in MSVC 11.
@@ -240,6 +266,10 @@ macro(append_common_sanitizer_flags)
       NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
     add_flag_if_supported("-gline-tables-only")
   endif()
+  # Use -O1 even in debug mode, otherwise sanitizers slowdown is too large.
+  if (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
+    add_flag_if_supported("-O1")
+  endif()
 endmacro()
 
 # Turn on sanitizers if necessary.