Buildsystem: Add support for compiling with MinGW on Windows

Tested with:
- Windows 8 x64
- MySQL 5.5.30 win32
- OpenSSL 1.0.1c (32 bits)
- No PCH
- MinGW with GCC 4.7.0

TODO:
- Fix compile/link with PCH enabled
- Fix compile with WheatyExceptonionReport enabled (ignored for now)
- Fix compile of .rc files (ignored for now)
- Test with more platforms

3 files changed, 63 insertions, 1 deletions

diff --git a/cmake/compiler/mingw/settings.cmake b/cmake/compiler/mingw/settings.cmake
new file mode 100644
index 00000000000..68156bd0b6b
--- /dev/null
+++ b/cmake/compiler/mingw/settings.cmake
@@ -0,0 +1,27 @@
+# set up output paths for executable binaries (.exe-files, and .dll-files on DLL-capable platforms)
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+
+# Set build-directive (used in core to tell which buildtype we used)
+add_definitions(-D_BUILD_DIRECTIVE=\\"${CMAKE_BUILD_TYPE}\\")
+
+if(PLATFORM EQUAL 32)
+  # Required on 32-bit systems to enable SSE2 (standard on x64)
+  set(SSE_FLAGS "-msse2 -mfpmath=sse")
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${SSE_FLAGS}")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${SSE_FLAGS}")
+endif()
+add_definitions(-DHAVE_SSE2 -D__SSE2__)
+message(STATUS "GCC: SFMT enabled, SSE2 flags forced")
+
+if( WITH_WARNINGS )
+  set(WARNING_FLAGS "-W -Wall -Wextra -Winit-self -Winvalid-pch -Wfatal-errors")
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${WARNING_FLAGS}")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${WARNING_FLAGS} -Woverloaded-virtual")
+  message(STATUS "GCC: All warnings enabled")
+endif()
+
+if( WITH_COREDEBUG )
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g3")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g3")
+  message(STATUS "GCC: Debug-flags set (-g3)")
+endif()
diff --git a/cmake/platform/win/settings.cmake b/cmake/platform/win/settings.cmake
index b66eb2da7bb..c0f724922e3 100644
--- a/cmake/platform/win/settings.cmake
+++ b/cmake/platform/win/settings.cmake
@@ -25,4 +25,8 @@ endif()
 #  endif()
 #endif()
 
-include(${CMAKE_SOURCE_DIR}/cmake/compiler/msvc/settings.cmake)
+if ( MSVC )
+  include(${CMAKE_SOURCE_DIR}/cmake/compiler/msvc/settings.cmake)
+elseif ( MINGW )
+  include(${CMAKE_SOURCE_DIR}/cmake/compiler/mingw/settings.cmake)
+endif()
diff --git a/cmake/stack_direction.c b/cmake/stack_direction.c
new file mode 100644
index 00000000000..11bcf803bfa
--- /dev/null
+++ b/cmake/stack_direction.c
@@ -0,0 +1,31 @@
+/* Copyright (C) 2009 Sun Microsystems, Inc
+ 
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; version 2 of the License.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */
+
+/* Check stack direction (0-down, 1-up) */
+int f(int *a) 
+{
+  int b;
+  return(&b > a)?1:0; 
+}
+/*
+ Prevent compiler optimizations by calling function 
+ through pointer.
+*/
+volatile int (*ptr_f)(int *) = f;
+int main() 
+{
+  int a;
+  return ptr_f(&a);
+}
\ No newline at end of file