ardupilot/Tools/ardupilotwaf/cmake.py

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# encoding: utf-8
# Copyright (C) 2015-2016 Intel Corporation. All rights reserved.
#
# This file 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, either version 3 of the License, or
# (at your option) any later version.
#
# This file 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, see <http://www.gnu.org/licenses/>.
"""
Waf tool for external builds with cmake. This tool defines the feature
'cmake_build', for building through the cmake interface.
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You can use CMAKE_MIN_VERSION environment variable before loading this tool in
the configuration to set a minimum version required for cmake. Example::
def configure(cfg):
cfg.env.CMAKE_MIN_VERSION = '3.5.2'
cfg.load('cmake')
Usage example::
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def build(bld):
# cmake configuration
foo = bld.cmake(
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name='foo',
cmake_src='path/to/foosrc', # where is the source tree
cmake_bld='path/to/foobld', # where to generate the build system
cmake_vars=dict(
CMAKE_BUILD_TYPE='Release',
...
),
)
# cmake build for external target 'bar'
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bld(
features='cmake_build',
cmake_config='foo', # this build depends on the cmake generation above defined
cmake_target='bar', # what to pass to option --target of cmake
)
# cmake build for target 'baz' (syntactic sugar)
foo.build('baz')
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The keys of cmake_vars are sorted so that unnecessary execution is avoided. If
you want to ensure an order in which the variables are passed to cmake, use an
OrderedDict. Example::
def build(bld):
foo_vars = OrderedDict()
foo_vars['CMAKE_BUILD_TYPE'] = 'Release'
foo_vars['FOO'] = 'value_of_foo'
foo_vars['BAR'] = 'value_of_bar'
# cmake configuration
foo = bld.cmake(
cmake_vars=foo_vars,
...
)
There may be cases when you want to establish dependency between other tasks and
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the external build system's products (headers and libraries, for example). In
that case, you can specify the specific files in the option 'target' of your
cmake_build task generator. Example::
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def build(bld):
...
# declaring on target only what I'm interested in
foo.build('baz', target='path/to/foobld/include/baz.h')
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# myprogram.c includes baz.h, so the dependency is (implicitly)
# established
bld.program(target='myprogram', source='myprogram.c')
# another example
foo.build('another', target='another.txt')
bld(
rule='${CP} ${SRC} ${TGT}',
source=bld.bldnode.find_or_declare('another.txt'),
target='another_copied.txt',
)
You can also establish the dependency directly on a task object::
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@feature('myfeature')
def process_myfeature(self):
baz_taskgen = self.bld.get_tgen_by_name('baz')
baz_taskgen.post()
# every cmake_build taskgen stores its task in cmake_build_task
baz_task = baz_taskgen.cmake_build_task
tsk = self.create_task('mytask')
tsk.set_run_after(baz_task)
# tsk is run whenever baz_task changes its outputs, namely,
# path/to/foobld/include/baz.h
tsk.dep_nodes.extend(baz_task.outputs)
If your cmake build creates several files (that may be dependency for several
tasks), you can use the parameter cmake_output_patterns. It receives a pattern
or a list of patterns relative to the cmake build directory. After the build
task is run, the files that match those patterns are set as output of the cmake
build task, so that they get a signature. Example::
def build(bld):
...
foo.build('baz', cmake_output_patterns='include/*.h')
...
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"""
from waflib import Context, Node, Task, Utils
from waflib.Configure import conf
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from waflib.TaskGen import feature, taskgen_method
from collections import OrderedDict
import os
import re
import sys
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class cmake_configure_task(Task.Task):
vars = ['CMAKE_BLD_DIR']
run_str = '${CMAKE} ${CMAKE_FLAGS} ${CMAKE_SRC_DIR} ${CMAKE_VARS} ${CMAKE_GENERATOR_OPTION}'
color = 'BLUE'
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def exec_command(self, cmd, **kw):
kw['stdout'] = sys.stdout
return super(cmake_configure_task, self).exec_command(cmd, **kw)
def uid(self):
if not hasattr(self, 'uid_'):
m = Utils.md5()
def u(s):
m.update(s.encode('utf-8'))
u(self.__class__.__name__)
u(self.env.get_flat('CMAKE_SRC_DIR'))
u(self.env.get_flat('CMAKE_BLD_DIR'))
u(self.env.get_flat('CMAKE_VARS'))
u(self.env.get_flat('CMAKE_FLAGS'))
self.uid_ = m.digest()
return self.uid_
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def __str__(self):
return self.cmake.name
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def keyword(self):
return 'CMake Configure'
# Clean cmake configuration
cmake_configure_task._original_run = cmake_configure_task.run
def _cmake_configure_task_run(self):
cmakecache_path = self.outputs[0].abspath()
if os.path.exists(cmakecache_path):
os.remove(cmakecache_path)
self._original_run()
cmake_configure_task.run = _cmake_configure_task_run
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class cmake_build_task(Task.Task):
run_str = '${CMAKE} --build ${CMAKE_BLD_DIR} --target ${CMAKE_TARGET}'
color = 'BLUE'
# the cmake-generated build system is responsible of managing its own
# dependencies
always_run = True
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def exec_command(self, cmd, **kw):
kw['stdout'] = sys.stdout
return super(cmake_build_task, self).exec_command(cmd, **kw)
def uid(self):
if not hasattr(self, 'uid_'):
m = Utils.md5()
def u(s):
m.update(s.encode('utf-8'))
u(self.__class__.__name__)
u(self.env.get_flat('CMAKE_BLD_DIR'))
u(self.env.get_flat('CMAKE_TARGET'))
self.uid_ = m.digest()
return self.uid_
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def __str__(self):
return '%s %s' % (self.cmake.name, self.cmake_target)
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def keyword(self):
return 'CMake Build'
cmake_build_task.original_post_run = cmake_build_task.post_run
def _cmake_build_task_post_run(self):
self.output_patterns = Utils.to_list(self.output_patterns)
if not self.output_patterns:
return self.original_post_run()
bldnode = self.cmake.bldnode
for node in bldnode.ant_glob(self.output_patterns, remove=False):
self.set_outputs(node)
return self.original_post_run()
cmake_build_task.post_run = _cmake_build_task_post_run
class CMakeConfig(object):
'''
CMake configuration. This object shouldn't be instantiated directly. Use
bld.cmake().
'''
def __init__(self, bld, name, srcnode, bldnode, cmake_vars, cmake_flags):
self.bld = bld
self.name = name
self.srcnode = srcnode
self.bldnode = bldnode
self.vars = cmake_vars
self.flags = cmake_flags
self._config_task = None
self.last_build_task = None
def vars_keys(self):
keys = list(self.vars.keys())
if not isinstance(self.vars, OrderedDict):
keys.sort()
return keys
def config_sig(self):
m = Utils.md5()
def u(s):
m.update(s.encode('utf-8'))
u(self.srcnode.abspath())
u(self.bldnode.abspath())
for v in self.flags:
u(v)
keys = self.vars_keys()
for k in keys:
u(k)
u(self.vars[k])
return m.digest()
def config_task(self, taskgen):
sig = self.config_sig()
if self._config_task and self._config_task.cmake_config_sig == sig:
return self._config_task
self._config_task = taskgen.create_task('cmake_configure_task')
self._config_task.cwd = self.bldnode
self._config_task.cmake = self
self._config_task.cmake_config_sig = sig
env = self._config_task.env
env.CMAKE_BLD_DIR = self.bldnode.abspath()
env.CMAKE_SRC_DIR = self.srcnode.abspath()
keys = self.vars_keys()
env.CMAKE_VARS = ["-D%s='%s'" % (k, self.vars[k]) for k in keys]
env.CMAKE_FLAGS = self.flags
self._config_task.set_outputs(
self.bldnode.find_or_declare('CMakeCache.txt'),
)
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if self.last_build_task:
self._config_task.set_run_after(self.last_build_task)
self.bldnode.mkdir()
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return self._config_task
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def build(self, cmake_target, **kw):
return self.bld.cmake_build(self.name, cmake_target, **kw)
_cmake_instances = {}
def get_cmake(name):
if name not in _cmake_instances:
raise Exception('cmake: configuration named "%s" not found' % name)
return _cmake_instances[name]
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@conf
def cmake(bld, name, cmake_src=None, cmake_bld=None, cmake_vars={}, cmake_flags=''):
'''
This function has two signatures:
- bld.cmake(name, cmake_src, cmake_bld, cmake_vars):
Create a cmake configuration.
- bld.cmake(name):
Get the cmake configuration with name.
'''
if not cmake_src and not cmake_bld and not cmake_vars:
return get_cmake(name)
if name in _cmake_instances:
bld.fatal('cmake: configuration named "%s" already exists' % name)
if not isinstance(cmake_src, Node.Node):
cmake_src = bld.path.find_dir(cmake_src)
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if not cmake_bld:
cmake_bld = cmake_src.get_bld()
elif not isinstance(cmake_bld, Node.Node):
cmake_bld = bld.bldnode.make_node(cmake_bld)
c = CMakeConfig(bld, name, cmake_src, cmake_bld, cmake_vars, cmake_flags)
_cmake_instances[name] = c
return c
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@feature('cmake_build')
def process_cmake_build(self):
if not hasattr(self, 'cmake_target'):
self.bld.fatal('cmake_build: taskgen is missing cmake_target')
if not hasattr(self, 'cmake_config'):
self.bld.fatal('cmake_build: taskgen is missing cmake_config')
tsk = self.create_cmake_build_task(self.cmake_config, self.cmake_target)
self.cmake_build_task = tsk
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outputs = Utils.to_list(getattr(self, 'target', ''))
if not isinstance(outputs, list):
outputs = [outputs]
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for o in outputs:
if not isinstance(o, Node.Node):
o = self.path.find_or_declare(o)
tsk.set_outputs(o)
tsk.output_patterns = getattr(self, 'cmake_output_patterns', [])
@conf
def cmake_build(bld, cmake_config, cmake_target, **kw):
kw['cmake_config'] = cmake_config
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kw['cmake_target'] = cmake_target
kw['features'] = Utils.to_list(kw.get('features', [])) + ['cmake_build']
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if 'name' not in kw:
kw['name'] = '%s_%s' % (cmake_config, cmake_target)
return bld(**kw)
@taskgen_method
def create_cmake_build_task(self, cmake_config, cmake_target):
cmake = get_cmake(cmake_config)
tsk = self.create_task('cmake_build_task')
tsk.cmake = cmake
tsk.cmake_target = cmake_target
tsk.output_patterns = []
tsk.env.CMAKE_BLD_DIR = cmake.bldnode.abspath()
tsk.env.CMAKE_TARGET = cmake_target
self.cmake_config_task = cmake.config_task(self)
tsk.set_run_after(self.cmake_config_task)
if cmake.last_build_task:
tsk.set_run_after(cmake.last_build_task)
cmake.last_build_task = tsk
return tsk
def _check_min_version(cfg):
cfg.start_msg('Checking cmake version')
cmd = cfg.env.get_flat('CMAKE'), '--version'
out = cfg.cmd_and_log(cmd, quiet=Context.BOTH)
m = re.search(r'\d+\.\d+(\.\d+(\.\d+)?)?', out)
if not m:
cfg.end_msg(
'unable to parse version, build is not guaranteed to succeed',
color='YELLOW',
)
else:
version = Utils.num2ver(m.group(0))
minver_str = cfg.env.get_flat('CMAKE_MIN_VERSION')
minver = Utils.num2ver(minver_str)
if version < minver:
cfg.fatal('cmake must be at least at version %s' % minver_str)
cfg.end_msg(m.group(0))
generators = dict(
default=[
(['ninja', 'ninja-build'], 'Ninja'),
(['make'], 'Unix Makefiles'),
],
win32=[
(['ninja', 'ninja-build'], 'Ninja'),
(['nmake'], 'NMake Makefiles'),
],
)
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def configure(cfg):
cfg.find_program('cmake')
if cfg.env.CMAKE_MIN_VERSION:
_check_min_version(cfg)
l = generators.get(Utils.unversioned_sys_platform(), generators['default'])
for names, generator in l:
if cfg.find_program(names, mandatory=False):
cfg.env.CMAKE_GENERATOR_OPTION = '-G%s' % generator
break
else:
cfg.fatal("cmake: couldn't find a suitable CMake generator. " +
"The ones supported by this Waf tool for this platform are: %s" % ', '.join(g for _, g in l))