1 files changed, 63 insertions, 0 deletions
diff --git a/engine/SCons/Tool/m4.py b/engine/SCons/Tool/m4.py
new file mode 100644
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+++ b/engine/SCons/Tool/m4.py
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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 (c) 2001 - 2014 The SCons Foundation
+#
+# 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__ = "src/engine/SCons/Tool/m4.py  2014/09/27 12:51:43 garyo"
+
+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')
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4: