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

1 files changed, 31 insertions, 0 deletions

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