Merged revisions 1738-1754,1756 via svnmerge from

http://scons.tigris.org/svn/scons/branches/core

........
  r1741 | stevenknight | 2006-12-16 22:51:07 -0600 (Sat, 16 Dec 2006) | 1 line

  0.96.D527 - Give the f90 and f95 Tool modules knowledge of how to build source files of earlier Fortran versions.
........
  r1742 | stevenknight | 2006-12-16 23:22:54 -0600 (Sat, 16 Dec 2006) | 1 line

  0.96.D528 - Better handling of timestamp fallback if there's no md5 module.
........
  r1743 | stevenknight | 2006-12-17 00:21:31 -0600 (Sun, 17 Dec 2006) | 1 line

  0.96.D529 - Fix portability of new tests on systems that don't have TeX installed.
........
  r1744 | stevenknight | 2006-12-19 15:30:16 -0600 (Tue, 19 Dec 2006) | 1 line

  0.96.D530 - Eliminate the ListBuilder subclass in favor of using the Executor's target lists.
........
  r1745 | stevenknight | 2006-12-19 18:54:26 -0600 (Tue, 19 Dec 2006) | 1 line

  0.96.D531 - Eliminate of MultiStepBuilder as a separate Builder subclass.
........
  r1746 | garyo | 2006-12-21 13:21:08 -0600 (Thu, 21 Dec 2006) | 1 line

  Minor doc fix, thanks to Douglas Landgraf.
........
  r1747 | stevenknight | 2006-12-21 17:13:55 -0600 (Thu, 21 Dec 2006) | 1 line

  0.96.D533 - Add CFLAGS for options common to C/C++. (Gary Oberbrunner)
........
  r1748 | stevenknight | 2007-01-03 19:48:05 -0600 (Wed, 03 Jan 2007) | 1 line

  0.96.D534 - Fix signature storage when targets are retrieved from CacheDir().
........
  r1749 | stevenknight | 2007-01-04 16:48:47 -0600 (Thu, 04 Jan 2007) | 1 line

  0.96.D535 - Teach the lex and yacc tools about target files generated by different flex/bison options, and about Objective C suffixes. (Pupeno)
........
  r1750 | stevenknight | 2007-01-04 17:14:38 -0600 (Thu, 04 Jan 2007) | 1 line

  0.96.D536 - Refactor duplicate disambiguation logic in Entry.get_contents().
........
  r1751 | stevenknight | 2007-01-05 13:00:54 -0600 (Fri, 05 Jan 2007) | 1 line

  0.96.D537 - Fix lprof regression from 0.96.92.
........
  r1752 | stevenknight | 2007-01-05 20:43:48 -0600 (Fri, 05 Jan 2007) | 1 line

  0.96.D538 - Fix caching of Builder suffix matching (to fix lprof regression).
........
  r1753 | stevenknight | 2007-01-06 00:03:16 -0600 (Sat, 06 Jan 2007) | 1 line

  0.96.D539 - Fix --include-dir when using MinGW. (Paul)
........
  r1754 | stevenknight | 2007-01-06 00:24:53 -0600 (Sat, 06 Jan 2007) | 1 line

  0.96.D540 - Make bootstrap.py something useful to execute SCons out of a source directory.
........
  r1756 | stevenknight | 2007-01-06 21:32:11 -0600 (Sat, 06 Jan 2007) | 1 line

  0.96.D541 - Update the Copyright year string to include 2007. Automate updating the month+year string in man page title headers. Fix hard-coded __revision__ strings that crept into some older tests.
........

1 files changed, 45 insertions, 8 deletions

diff --git a/src/engine/SCons/Tool/lex.py b/src/engine/SCons/Tool/lex.py
index 3331f6c..31f21a9 100644
--- a/src/engine/SCons/Tool/lex.py
+++ b/src/engine/SCons/Tool/lex.py
@@ -33,23 +33,60 @@ selection method.
 
 __revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
 
+import os.path
+
+import string
+
 import SCons.Action
 import SCons.Tool
 import SCons.Util
 
 LexAction = SCons.Action.Action("$LEXCOM", "$LEXCOMSTR")
 
+def lexEmitter(target, source, env):
+    sourceBase, sourceExt = os.path.splitext(SCons.Util.to_String(source[0]))
+
+    if sourceExt == ".lm":           # If using Objective-C
+        target = [sourceBase + ".m"] # the extension is ".m".
+
+    # This emitter essentially tries to add to the target all extra
+    # files generated by flex.
+
+    # Different options that are used to trigger the creation of extra files.
+    fileGenOptions = ["--header-file=", "--tables-file="]
+
+    for option in SCons.Util.CLVar(env.subst("$LEXFLAGS")):
+        for fileGenOption in fileGenOptions:
+            l = len(fileGenOption)
+            if option[:l] == fileGenOption:
+                # A file generating option is present, so add the
+                # file name to the target list.
+                fileName = string.strip(option[l:])
+                target.append(fileName)
+    return (target, source)
+
 def generate(env):
     """Add Builders and construction variables for lex to an Environment."""
     c_file, cxx_file = SCons.Tool.createCFileBuilders(env)
 
-    c_file.add_action('.l', LexAction)
-    c_file.add_action('.lex', LexAction)
-    cxx_file.add_action('.ll', LexAction)
+    # C
+    c_file.add_action(".l", LexAction)
+    c_file.add_emitter(".l", lexEmitter)
+
+    c_file.add_action(".lex", LexAction)
+    c_file.add_emitter(".lex", lexEmitter)
+
+    # Objective-C
+    cxx_file.add_action(".lm", LexAction)
+    cxx_file.add_emitter(".lm", lexEmitter)
+
+    # C++
+    cxx_file.add_action(".ll", LexAction)
+    cxx_file.add_emitter(".ll", lexEmitter)
+
+    env["LEX"]      = env.Detect("flex") or "lex"
+    env["LEXFLAGS"] = SCons.Util.CLVar("")
+    env["LEXCOM"] = "$LEX $LEXFLAGS -t $SOURCES > $TARGET"
 
-    env['LEX']      = env.Detect('flex') or 'lex'
-    env['LEXFLAGS'] = SCons.Util.CLVar('')
-    env['LEXCOM']   = '$LEX $LEXFLAGS -t $SOURCES > $TARGET'
-    
 def exists(env):
-    return env.Detect(['flex', 'lex'])
+    return env.Detect(["flex", "lex"])