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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
+variables intended for 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
+
+else one can set ``cfg.env.CHOST`` in ``wscript`` before loading ``cross_gnu``.
+
+Usage:
+
+- In your build script::
+
+ def configure(cfg):
+ ...
+ for variant in x_variants:
+ setenv(variant)
+ conf.load('cross_gnu')
+ 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
+
+This example ``wscript`` compiles to Microchip PIC (xc16-gcc-xyz must be in PATH):
+
+.. code:: python
+
+ from waflib import Configure
+
+ #from https://gist.github.com/rpuntaie/2bddfb5d7b77db26415ee14371289971
+ import waf_variants
+
+ variants='pc fw/variant1 fw/variant2'.split()
+
+ top = "."
+ out = "../build"
+
+ PIC = '33FJ128GP804' #dsPICxxx
+
+ @Configure.conf
+ def gcc_modifier_xc16(cfg):
+ v = cfg.env
+ v.cprogram_PATTERN = '%s.elf'
+ v.LINKFLAGS_cprogram = ','.join(['-Wl','','','--defsym=__MPLAB_BUILD=0','','--script=p'+PIC+'.gld',
+ '--stack=16','--check-sections','--data-init','--pack-data','--handles','--isr','--no-gc-sections',
+ '--fill-upper=0','--stackguard=16','--no-force-link','--smart-io']) #,'--report-mem'])
+ v.CFLAGS_cprogram=['-mcpu='+PIC,'-omf=elf','-mlarge-code','-msmart-io=1',
+ '-msfr-warn=off','-mno-override-inline','-finline','-Winline']
+
+ def configure(cfg):
+ if 'fw' in cfg.variant: #firmware
+ cfg.env.DEST_OS = 'xc16' #cfg.env.CHOST = 'xc16' #works too
+ cfg.load('c cross_gnu') #cfg.env.CHOST becomes ['xc16']
+ ...
+ else: #configure for pc SW
+ ...
+
+ def build(bld):
+ if 'fw' in bld.variant: #firmware
+ bld.program(source='maintst.c', target='maintst');
+ bld(source='maintst.elf', target='maintst.hex', rule="xc16-bin2hex ${SRC} -a -omf=elf")
+ else: #build for pc SW
+ ...
+
+"""
+
+import os
+from waflib import Utils, Configure
+from waflib.Tools import ccroot, gcc
+
+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_var(conf, name, wafname=None, cross=False):
+ wafname = wafname or name
+
+ if wafname in conf.env:
+ value = conf.env[wafname]
+ if isinstance(value, str):
+ value = [value]
+ else:
+ envar = os.environ.get(name)
+ if not envar:
+ 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))
+
+ 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)
+ 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))
+
+ 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)
+ 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_var('CHOST', cross=True)
+ conf.env.CHOST = conf.env.CHOST or [conf.env.DEST_OS]
+ conf.env.DEST_OS = conf.env.CHOST[0].replace('-','_')
+ 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]
+
+def configure(conf):
+ """
+ Configuration example for gcc, it will not work for g++/clang/clang++
+ """
+ conf.xcheck_host()
+ conf.gcc_common_flags()
+ conf.gcc_modifier_platform()
+ conf.cc_load_tools()
+ conf.cc_add_flags()
+ conf.link_add_flags()