Added new scons target: cudakernels

It's intended to perform compilation of CUDA kernels only,
without doing anything with other sources/resources and
main purpose of this target is to be able to compile cuda
kernels in completely different environment than the rest
of blender was compiled.

This is needed for linux build environment, where sm_13
compilation fails dramatically in 32bit chroot but could
be compiled in 64bit environment.

SConstruct

@@ -275,6 +275,9 @@ if 'blenderlite' in B.targets:
         if k not in B.arguments:
             env[k] = v
 
+if 'cudakernels' in B.targets:
+    env['WITH_BF_CYCLES_CUDA_BINARIES'] = True
+
 # Extended OSX_SDK and 3D_CONNEXION_CLIENT_LIBRARY and JAckOSX detection for OSX
 if env['OURPLATFORM']=='darwin':
     print B.bc.OKGREEN + "Detected Xcode version: -- " + B.bc.ENDC + env['XCODE_CUR_VER'] + " --"
@@ -651,6 +654,7 @@ datafileslist = []
 datafilestargetlist = []
 dottargetlist = []
 scriptinstall = []
+cubininstall = []
 
 if env['OURPLATFORM']!='darwin':
     dotblenderinstall = []
@@ -746,7 +750,7 @@ if env['OURPLATFORM']!='darwin':
                 for arch in env['BF_CYCLES_CUDA_BINARIES_ARCH']:
                     kernel_build_dir = os.path.join(B.root_build_dir, 'intern/cycles/kernel')
                     cubin_file = os.path.join(kernel_build_dir, "kernel_%s.cubin" % arch)
-                    scriptinstall.append(env.Install(dir=dir,source=cubin_file))
+                    cubininstall.append(env.Install(dir=dir,source=cubin_file))
 
             # osl shaders
             if env['WITH_BF_CYCLES_OSL']:
@@ -857,9 +861,9 @@ textinstall = env.Install(dir=env['BF_INSTALLDIR'], source=textlist)
 if  env['OURPLATFORM']=='darwin':
         allinstall = [blenderinstall, textinstall]
 elif env['OURPLATFORM']=='linux':
-        allinstall = [blenderinstall, dotblenderinstall, scriptinstall, textinstall, iconinstall]
+        allinstall = [blenderinstall, dotblenderinstall, scriptinstall, textinstall, iconinstall, cubininstall]
 else:
-        allinstall = [blenderinstall, dotblenderinstall, scriptinstall, textinstall]
+        allinstall = [blenderinstall, dotblenderinstall, scriptinstall, textinstall, cubininstall]
 
 if env['OURPLATFORM'] in ('win32-vc', 'win32-mingw', 'win64-vc', 'linuxcross'):
     dllsources = []
@@ -989,6 +993,20 @@ buildslave_alias = env.Alias('buildslave', buildslave_cmd)
 
 Depends(buildslave_cmd, allinstall)
 
+cudakernels_action = env.Action(btools.cudakernels, btools.cudakernels_print)
+cudakernels_cmd = env.Command('cudakernels_exec', None, cudakernels_action)
+cudakernels_alias = env.Alias('cudakernels', cudakernels_cmd)
+
+cudakernel_dir = os.path.join(os.path.abspath(os.path.normpath(B.root_build_dir)), 'intern/cycles/kernel')
+cuda_kernels = []
+
+for x in env['BF_CYCLES_CUDA_BINARIES_ARCH']:
+    cubin = os.path.join(cudakernel_dir, 'kernel_' + x + '.cubin')
+    cuda_kernels.append(cubin)
+
+Depends(cudakernels_cmd, cuda_kernels)
+Depends(cudakernels_cmd, cubininstall)
+
 Default(B.program_list)
 
 if not env['WITHOUT_BF_INSTALL']:

build_files/scons/tools/btools.py

@@ -215,7 +215,8 @@ def print_targets(targs, bc):
 def validate_targets(targs, bc):
     valid_list = ['.', 'blender', 'blenderstatic', 'blenderplayer', 'webplugin',
             'blendernogame', 'blenderstaticnogame', 'blenderlite', 'release',
-            'everything', 'clean', 'install-bin', 'install', 'nsis','buildslave']
+            'everything', 'clean', 'install-bin', 'install', 'nsis','buildslave',
+            'cudakernels']
     oklist = []
     for t in targs:
         if t in valid_list:
@@ -826,6 +827,18 @@ def NSIS_Installer(target=None, source=None, env=None):
         print data.strip().split("\n")[-1]
     return rv
 
+def cudakernels_print(target, source, env):
+    return "Running cudakernels target"
+
+def cudakernels(target=None, source=None, env=None):
+    """
+    Builder for cuda kernels compilation. Used by release build environment only
+    """
+
+    # Currently nothing to do, everything is handled by a dependency resolver
+
+    pass
+
 def check_environ():
     problematic_envvars = ""
     for i in os.environ: