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#!/usr/bin/python
# -*- coding: utf-8 vi:ts=4:noexpandtab
# Tool to provide dedicated variables for cross-compilation
__author__ = __maintainer__ = "Jérôme Carretero <cJ-waf@zougloub.eu>"
__copyright__ = "Jérôme Carretero, 2014"
"""
This tool allows to use environment variables to define cross-compilation things,
mostly used when you use build variants.
The variables are obtained from the environment in 3 ways:
1. By defining CHOST, they can be derived as ${CHOST}-${TOOL}
2. By defining HOST_x
3. By defining ${CHOST//-/_}_x
Usage:
- In your build script::
def configure(cfg):
...
conf.load('c_cross_gnu')
for variant in x_variants:
conf.xcheck_host()
conf.xcheck_host_var('POUET')
...
...
- Then::
CHOST=arm-hardfloat-linux-gnueabi waf configure
env arm-hardfloat-linux-gnueabi-CC="clang -..." waf configure
CFLAGS=... CHOST=arm-hardfloat-linux-gnueabi HOST_CFLAGS=-g waf configure
HOST_CC="clang -..." waf configure
"""
import os
from waflib import Utils, Configure
try:
from shlex import quote
except ImportError:
from pipes import quote
def get_chost_stuff(conf):
"""
Get the CHOST environment variable contents
"""
chost = None
chost_envar = None
if conf.env.CHOST:
chost = conf.env.CHOST[0]
chost_envar = chost.replace('-', '_')
return chost, chost_envar
@Configure.conf
def xcheck_envar(conf, name, wafname=None, cross=False):
wafname = wafname or name
envar = os.environ.get(name, None)
if envar is None:
return
value = Utils.to_list(envar) if envar != '' else [envar]
conf.env[wafname] = value
if cross:
pretty = 'cross-compilation %s' % wafname
else:
pretty = wafname
conf.msg('Will use %s' % pretty,
" ".join(quote(x) for x in value))
@Configure.conf
def xcheck_host_prog(conf, name, tool, wafname=None):
wafname = wafname or name
chost, chost_envar = get_chost_stuff(conf)
specific = None
if chost:
specific = os.environ.get('%s_%s' % (chost_envar, name), None)
if specific:
value = Utils.to_list(specific)
conf.env[wafname] += value
conf.msg('Will use cross-compilation %s from %s_%s' \
% (name, chost_envar, name),
" ".join(quote(x) for x in value))
return
else:
envar = os.environ.get('HOST_%s' % name, None)
if envar is not None:
value = Utils.to_list(envar)
conf.env[wafname] = value
conf.msg('Will use cross-compilation %s from HOST_%s' \
% (name, name),
" ".join(quote(x) for x in value))
return
if conf.env[wafname]:
return
value = None
if chost:
value = '%s-%s' % (chost, tool)
if value:
conf.env[wafname] = value
conf.msg('Will use cross-compilation %s from CHOST' \
% wafname, value)
@Configure.conf
def xcheck_host_envar(conf, name, wafname=None):
wafname = wafname or name
chost, chost_envar = get_chost_stuff(conf)
specific = None
if chost:
specific = os.environ.get('%s_%s' % (chost_envar, name), None)
if specific:
value = Utils.to_list(specific)
conf.env[wafname] += value
conf.msg('Will use cross-compilation %s from %s_%s' \
% (name, chost_envar, name),
" ".join(quote(x) for x in value))
return
envar = os.environ.get('HOST_%s' % name, None)
if envar is None:
return
value = Utils.to_list(envar) if envar != '' else [envar]
conf.env[wafname] = value
conf.msg('Will use cross-compilation %s from HOST_%s' \
% (name, name),
" ".join(quote(x) for x in value))
@Configure.conf
def xcheck_host(conf):
conf.xcheck_envar('CHOST', cross=True)
conf.xcheck_host_prog('CC', 'gcc')
conf.xcheck_host_prog('CXX', 'g++')
conf.xcheck_host_prog('LINK_CC', 'gcc')
conf.xcheck_host_prog('LINK_CXX', 'g++')
conf.xcheck_host_prog('AR', 'ar')
conf.xcheck_host_prog('AS', 'as')
conf.xcheck_host_prog('LD', 'ld')
conf.xcheck_host_envar('CFLAGS')
conf.xcheck_host_envar('CXXFLAGS')
conf.xcheck_host_envar('LDFLAGS', 'LINKFLAGS')
conf.xcheck_host_envar('LIB')
conf.xcheck_host_envar('PKG_CONFIG_LIBDIR')
conf.xcheck_host_envar('PKG_CONFIG_PATH')
if not conf.env.env:
conf.env.env = {}
conf.env.env.update(os.environ)
if conf.env.PKG_CONFIG_LIBDIR:
conf.env.env['PKG_CONFIG_LIBDIR'] = conf.env.PKG_CONFIG_LIBDIR[0]
if conf.env.PKG_CONFIG_PATH:
conf.env.env['PKG_CONFIG_PATH'] = conf.env.PKG_CONFIG_PATH[0]
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