=== SCons ===

FINALLY! With this commit command-length problems are History. Thanks go to xuru from #scons for giving the nice pointer.
src is now again one lib, and further libsplitting should be rather unnecessary, unless we somehow reach the 37K limit (for internally used CreateProcess, by subprocess module)

SConstruct

@@ -115,6 +115,8 @@ if toolset:
         env.Tool('mstoolkit', ['tools'])
     else:
         env = BlenderEnvironment(tools=[toolset], ENV = os.environ)
+        if env:
+            btools.SetupSpawn(env)
 else:
     env = BlenderEnvironment(ENV = os.environ)
 
@@ -122,7 +124,7 @@ if not env:
     print "Could not create a build environment"
     Exit()
 
-env.SConscriptChdir(0)
+
 cc = B.arguments.get('CC', None)
 cxx = B.arguments.get('CXX', None)
 if cc:
@@ -135,53 +137,7 @@ if env['CC'] in ['cl', 'cl.exe'] and sys.platform=='win32':
 elif env['CC'] in ['gcc'] and sys.platform=='win32':
     platform = 'win32-mingw'
 
-# Fix me!
-#if platform == 'win32-mingw':
-if 0:
-    try:
-        import win32file
-        import win32event
-        import win32process
-        import win32security
-        import string
-
-        slash= re.compile(r"\\")
-
-        def myesc(b):
-            if b[0]!= "-":
-                b = slash.sub(r"\\\\", b[1:-1])
-                return "\"" + b + "\""
-            else:
-                return b
-
-        def my_spawn(sh, escape, cmd, args, spawnenv):
-            for var in spawnenv:
-                spawnenv[var] = spawnenv[var].encode('ascii', 'replace')
-
-            sAttrs = win32security.SECURITY_ATTRIBUTES()
-            StartupInfo = win32process.STARTUPINFO()
-            if cmd=='ar' and args[1]=='r':
-                args[1] = '-r'
-            newargs = string.join(map(myesc, args[1:]), ' ')
-            cmdline = cmd + " " + newargs
-
-            # check for any special operating system commands
-            if cmd == 'del':
-                for arg in args[1:]:
-                    win32file.DeleteFile(arg)
-                exit_code = 0
-            else:
-                # otherwise execute the command.
-                hProcess, hThread, dwPid, dwTid = win32process.CreateProcess(None, cmdline, None, None, 1, 0, spawnenv, None, StartupInfo)
-                win32event.WaitForSingleObject(hProcess, win32event.INFINITE)
-                exit_code = win32process.GetExitCodeProcess(hProcess)
-                win32file.CloseHandle(hProcess);
-                win32file.CloseHandle(hThread);
-            return exit_code
-
-        env['SPAWN'] = my_spawn
-    except:
-        print "install win32all from http://sourceforge.net/project/showfiles.php?group_id=78018"
+env.SConscriptChdir(0)
 
 crossbuild = B.arguments.get('BF_CROSS', None)
 if crossbuild and platform!='win32':
@@ -484,8 +440,6 @@ B.init_lib_dict()
 ##### END SETUP ##########
 
 Export('env')
-#Export('root_build_dir') # this one is still needed for makesdna
-##TODO: improve makesdna usage
 
 BuildDir(B.root_build_dir+'/intern', 'intern', duplicate=0)
 SConscript(B.root_build_dir+'/intern/SConscript')

source/blender/src/SConscript

@@ -4,18 +4,6 @@ Import ('env')
 # TODO: src_env.Append (CCFLAGS = user_options_dict['SDL_CFLAGS'])
 
 sources = env.Glob('*.c')
-numobj = len(sources)
-maxobj = 30
-
-numlibs = numobj / maxobj
-if (numobj % maxobj):
-    numlibs = numlibs + 1
-subsources = []
-
-if (env['OURPLATFORM'] == 'win32-mingw'):
-    for i in range(numlibs - 1):
-        subsources.append(sources[i*maxobj:(i+1)*maxobj])
-    subsources.append(sources[(numlibs-1)*maxobj:])
 
 incs = ' #/intern/guardedalloc #/intern/memutil'
 incs += ' ../blenlib ../makesdna ../blenkernel'
@@ -67,8 +55,4 @@ if env['WITH_BF_VERSE']:
 if env['BF_BUILDINFO'] == 1:
     defs.append('NAN_BUILDINFO')
 
-if (env['OURPLATFORM'] == 'win32-mingw'):
-    for i in range(numlibs):
-        env.BlenderLib ( libname = 'src%d' % (i), sources = subsources[i], includes = Split(incs), defines = defs, libtype=['core', 'intern'], priority = [5, 25] )
-else:
 env.BlenderLib ( libname = 'src', sources = sources, includes = Split(incs), defines = defs, libtype=['core', 'intern'], priority = [5, 25] )

tools/btools.py

-import sys
-import StringIO
+import os
+import os.path
 import SCons.Options
 import SCons.Options.BoolOption
+import subprocess
+import string
 
 Options = SCons.Options
 BoolOption = SCons.Options.BoolOption
@@ -84,33 +86,26 @@ def validate_targets(targs, bc):
             print '\t'+bc.WARNING+'Invalid target: '+bc.ENDC+t
     return oklist
 
-    
-
-class idBuffering:
-    def buffered_spawn( self, sh, escape, cmd, args, env ):
-        stderr = StringIO.StringIO()
-        stdout = StringIO.StringIO()
-        command_string = ''
-        for i in args:
-            if ( len( command_string ) ):
-                command_string += ' '
-            command_string += i
-        try:
-            retval = self.env['PSPAWN']( sh, escape, cmd, args, env, stdout, stderr )
-        except OSError, x:
-            if x.errno != 10:
-                raise x
-            print 'OSError ignored on command: %s' % command_string
-            retval = 0
-        sys.stdout.write( stdout.getvalue() )
-        sys.stderr.write( stderr.getvalue() )
-        return retval
-
-# get a clean error output when running multiple jobs
-def SetupBufferedOutput( env ):
-    buf = idBuffering()
-    buf.env = env
-    env['SPAWN'] = buf.buffered_spawn
+class ourSpawn:
+    def ourspawn(self, sh, escape, cmd, args, env):
+        newargs = string.join(args[1:], ' ')
+        cmdline = cmd + " " + newargs
+        startupinfo = subprocess.STARTUPINFO()
+        startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
+        proc = subprocess.Popen(cmdline, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE, startupinfo=startupinfo, shell = False)
+        data, err = proc.communicate()
+        rv = proc.wait()
+        if rv:
+            print "====="
+            print err
+            print "====="
+        return rv
+
+def SetupSpawn( env ):
+    buf = ourSpawn()
+    buf.ourenv = env
+    env['SPAWN'] = buf.ourspawn
 
 
 def read_opts(cfg, args):