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"""SCons.Tool.m4
Tool-specific initialization for m4.
There normally shouldn't be any need to import this module directly.
It will usually be imported through the generic SCons.Tool.Tool()
selection method.
"""
#
# __COPYRIGHT__
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
import SCons.Action
import SCons.Builder
import SCons.Util
def generate(env):
"""Add Builders and construction variables for m4 to an Environment."""
M4Action = SCons.Action.Action('$M4COM', '$M4COMSTR')
bld = SCons.Builder.Builder(action = M4Action, src_suffix = '.m4')
env['BUILDERS']['M4'] = bld
# .m4 files might include other files, and it would be pretty hard
# to write a scanner for it, so let's just cd to the dir of the m4
# file and run from there.
# The src_suffix setup is like so: file.c.m4 -> file.c,
# file.cpp.m4 -> file.cpp etc.
env['M4'] = 'm4'
env['M4FLAGS'] = SCons.Util.CLVar('-E')
env['M4COM'] = 'cd ${SOURCE.rsrcdir} && $M4 $M4FLAGS < ${SOURCE.file} > ${TARGET.abspath}'
def exists(env):
return env.Detect('m4')
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