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# This file contains waf optimisations for Samba
# most of these optimisations are possible because of the restricted build environment
# that Samba has. For example, Samba doesn't attempt to cope with Win32 paths during the
# build, and Samba doesn't need build varients
# overall this makes some build tasks quite a bit faster
import os
import Build, Utils, Node
from TaskGen import feature, after, before
import preproc
@feature('c', 'cc', 'cxx')
@after('apply_type_vars', 'apply_lib_vars', 'apply_core')
def apply_incpaths(self):
lst = []
try:
kak = self.bld.kak
except AttributeError:
kak = self.bld.kak = {}
# TODO move the uselib processing out of here
for lib in self.to_list(self.uselib):
for path in self.env['CPPPATH_' + lib]:
if not path in lst:
lst.append(path)
if preproc.go_absolute:
for path in preproc.standard_includes:
if not path in lst:
lst.append(path)
for path in self.to_list(self.includes):
if not path in lst:
if preproc.go_absolute or path[0] != '/': # os.path.isabs(path):
lst.append(path)
else:
self.env.prepend_value('CPPPATH', path)
for path in lst:
node = None
if path[0] == '/': # os.path.isabs(path):
if preproc.go_absolute:
node = self.bld.root.find_dir(path)
elif path[0] == '#':
node = self.bld.srcnode
if len(path) > 1:
try:
node = kak[path]
except KeyError:
kak[path] = node = node.find_dir(path[1:])
else:
try:
node = kak[(self.path.id, path)]
except KeyError:
kak[(self.path.id, path)] = node = self.path.find_dir(path)
if node:
self.env.append_value('INC_PATHS', node)
@feature('c', 'cc')
@after('apply_incpaths')
def apply_obj_vars_cc(self):
"""after apply_incpaths for INC_PATHS"""
env = self.env
app = env.append_unique
cpppath_st = env['CPPPATH_ST']
lss = env['_CCINCFLAGS']
try:
cac = self.bld.cac
except AttributeError:
cac = self.bld.cac = {}
# local flags come first
# set the user-defined includes paths
for i in env['INC_PATHS']:
try:
lss.extend(cac[i.id])
except KeyError:
cac[i.id] = [cpppath_st % i.bldpath(env), cpppath_st % i.srcpath(env)]
lss.extend(cac[i.id])
env['_CCINCFLAGS'] = lss
# set the library include paths
for i in env['CPPPATH']:
app('_CCINCFLAGS', cpppath_st % i)
import Node, Environment
def vari(self):
return "default"
Environment.Environment.variant = vari
def variant(self, env):
if not env: return 0
elif self.id & 3 == Node.FILE: return 0
else: return "default"
Node.Node.variant = variant
import TaskGen, Task
def create_task(self, name, src=None, tgt=None):
task = Task.TaskBase.classes[name](self.env, generator=self)
if src:
task.set_inputs(src)
if tgt:
task.set_outputs(tgt)
return task
TaskGen.task_gen.create_task = create_task
def hash_constraints(self):
a = self.attr
sum = hash((str(a('before', '')),
str(a('after', '')),
str(a('ext_in', '')),
str(a('ext_out', '')),
self.__class__.maxjobs))
return sum
Task.TaskBase.hash_constraints = hash_constraints
def hash_env_vars(self, env, vars_lst):
idx = str(id(env)) + str(vars_lst)
try:
return self.cache_sig_vars[idx]
except KeyError:
pass
m = Utils.md5()
m.update(''.join([str(env[a]) for a in vars_lst]))
ret = self.cache_sig_vars[idx] = m.digest()
return ret
Build.BuildContext.hash_env_vars = hash_env_vars
def store_fast(self, filename):
file = open(filename, 'wb')
data = self.get_merged_dict()
try:
Build.cPickle.dump(data, file, -1)
finally:
file.close()
Environment.Environment.store_fast = store_fast
def load_fast(self, filename):
file = open(filename, 'rb')
try:
data = Build.cPickle.load(file)
finally:
file.close()
self.table.update(data)
Environment.Environment.load_fast = load_fast
def is_this_a_static_lib(self, name):
try:
cache = self.cache_is_this_a_static_lib
except AttributeError:
cache = self.cache_is_this_a_static_lib = {}
try:
return cache[name]
except KeyError:
ret = cache[name] = 'cstaticlib' in self.bld.get_tgen_by_name(name).features
return ret
TaskGen.task_gen.is_this_a_static_lib = is_this_a_static_lib
def shared_ancestors(self):
try:
cache = self.cache_is_this_a_static_lib
except AttributeError:
cache = self.cache_is_this_a_static_lib = {}
try:
return cache[id(self)]
except KeyError:
ret = []
if 'cshlib' in self.features: # or 'cprogram' in self.features:
if getattr(self, 'uselib_local', None):
lst = self.to_list(self.uselib_local)
ret = [x for x in lst if not self.is_this_a_static_lib(x)]
cache[id(self)] = ret
return ret
TaskGen.task_gen.shared_ancestors = shared_ancestors
@feature('c', 'cc', 'cxx')
@after('apply_link', 'init_cc', 'init_cxx', 'apply_core')
def apply_lib_vars(self):
"""after apply_link because of 'link_task'
after default_cc because of the attribute 'uselib'"""
# after 'apply_core' in case if 'cc' if there is no link
env = self.env
app = env.append_value
seen_libpaths = set([])
# OPTIMIZATION 1: skip uselib variables already added (700ms)
seen_uselib = set([])
# 1. the case of the libs defined in the project (visit ancestors first)
# the ancestors external libraries (uselib) will be prepended
self.uselib = self.to_list(self.uselib)
names = self.to_list(self.uselib_local)
seen = set([])
tmp = Utils.deque(names) # consume a copy of the list of names
while tmp:
lib_name = tmp.popleft()
# visit dependencies only once
if lib_name in seen:
continue
y = self.get_tgen_by_name(lib_name)
if not y:
raise Utils.WafError('object %r was not found in uselib_local (required by %r)' % (lib_name, self.name))
y.post()
seen.add(lib_name)
# OPTIMIZATION 2: pre-compute ancestors shared libraries (100ms)
tmp.extend(y.shared_ancestors())
# link task and flags
if getattr(y, 'link_task', None):
link_name = y.target[y.target.rfind('/') + 1:]
if 'cstaticlib' in y.features:
app('STATICLIB', link_name)
elif 'cshlib' in y.features or 'cprogram' in y.features:
# WARNING some linkers can link against programs
app('LIB', link_name)
# the order
self.link_task.set_run_after(y.link_task)
# for the recompilation
dep_nodes = getattr(self.link_task, 'dep_nodes', [])
self.link_task.dep_nodes = dep_nodes + y.link_task.outputs
# OPTIMIZATION 3: reduce the amount of function calls
# add the link path too
par = y.link_task.outputs[0].parent
if id(par) not in seen_libpaths:
seen_libpaths.add(id(par))
tmp_path = par.bldpath(self.env)
if not tmp_path in env['LIBPATH']:
env.prepend_value('LIBPATH', tmp_path)
# add ancestors uselib too - but only propagate those that have no staticlib
for v in self.to_list(y.uselib):
if v not in seen_uselib:
seen_uselib.add(v)
if not env['STATICLIB_' + v]:
if not v in self.uselib:
self.uselib.insert(0, v)
# 2. the case of the libs defined outside
for x in self.uselib:
for v in self.p_flag_vars:
val = self.env[v + '_' + x]
if val:
self.env.append_value(v, val)
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