It is now possible to compile a profiling build with mingw+scons.

Here are the changes I've had to make:
* Added default settings for BF_PROFILE and BF_PROFILE_FLAGS for mingw
* Made makesdna.c link with profiling flags too. This fixes some linking problems related to guardedmalloc for linking it. I'm not sure if this breaks compiling with BF_PROFILE on other platforms.

config/win32-mingw-config.py

@@ -156,5 +156,8 @@ LLIBS = ['-lshell32', '-lshfolder', '-ldxguid', '-lgdi32', '-lmsvcrt', '-lwinmm'
 BF_DEBUG = 'false'
 BF_DEBUG_FLAGS= '-g'
 
+BF_PROFILE_FLAGS = ['-pg','-g']
+BF_PROFILE = 'false'
+
 BF_BUILDDIR = '..\\build\\win32-mingw'
 BF_INSTALLDIR='..\\install\\win32-mingw'

source/blender/makesdna/intern/SConscript

@@ -25,6 +25,8 @@ if sys.platform != 'cygwin':
     makesdna_tool.Append (CCFLAGS = cflags)
 makesdna_tool.Append (CPPDEFINES = defines)
 makesdna_tool.Append (LIBPATH = '#'+root_build_dir+'/lib')
+if env['BF_PROFILE']:
+	makesdna_tool.Append (LINKFLAGS = env['BF_PROFILE_FLAGS'])
 
 if env['OURPLATFORM'] == 'linux2' and root_build_dir[0]==os.sep:
     makesdna = makesdna_tool.Program (target = root_build_dir+'/makesdna', source = source_files, LIBS=['bf_guardedalloc'])