Merged revisions 2454-2525 via svnmerge from

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

........
  r2455 | stevenknight | 2007-09-20 01:27:23 -0500 (Thu, 20 Sep 2007) | 2 lines

  Use ${TARGET.base} to make sure $TARGET attributes stay fixed.
........
  r2456 | stevenknight | 2007-09-25 11:52:30 -0500 (Tue, 25 Sep 2007) | 5 lines

  Issue 1734:  Avoid having content signature calculation of Alias Nodes
  consume excessive amounts of memory by having an Alias' "contents" be a
  concatenation of the children's signatures, not the children's contents.
  (Ken Deeter)
........
  r2457 | stevenknight | 2007-09-26 12:18:49 -0500 (Wed, 26 Sep 2007) | 2 lines

  Add an Options.UnknownOptions() method.
........
  r2458 | stevenknight | 2007-09-26 16:26:05 -0500 (Wed, 26 Sep 2007) | 2 lines

  Add a compatibility fnmatch.filter() function.
........
  r2459 | stevenknight | 2007-09-27 18:26:03 -0500 (Thu, 27 Sep 2007) | 3 lines

  Add a new Glob() function that matches in-memory Nodes as well as on-disk
  files (including matching repository and source directories).
........
  r2460 | stevenknight | 2007-09-28 15:01:37 -0500 (Fri, 28 Sep 2007) | 5 lines

  Issue 1020:  fix use of Clean() for files created by "side effect"
  in BuildDir() by removing the file by absolute path, not by what str()
  returns.  (It will think that the file is a source file and return a
  path to the source directory.)
........
  r2461 | stevenknight | 2007-09-29 05:39:09 -0500 (Sat, 29 Sep 2007) | 2 lines

  Update to TestCmd 0.28 modules.
........
  r2462 | stevenknight | 2007-09-29 05:49:29 -0500 (Sat, 29 Sep 2007) | 3 lines

  The RPM packaging can no longer take a "target" argument and produces
  an appropriate error message.  Update the test accordingly.
........
  r2463 | pscholl | 2007-09-30 08:57:01 -0500 (Sun, 30 Sep 2007) | 3 lines

  fix documentation issues (issue 1736 on the bugtracker)
........
  r2464 | pscholl | 2007-09-30 09:39:49 -0500 (Sun, 30 Sep 2007) | 3 lines

  fix target set up if multiple package builders are specified at once.
........
  r2465 | stevenknight | 2007-10-01 13:00:44 -0500 (Mon, 01 Oct 2007) | 3 lines

  Update to TestCmd 0.29, with new methods for searching for a list
  of lines in output.
........
  r2466 | stevenknight | 2007-10-01 13:58:41 -0500 (Mon, 01 Oct 2007) | 4 lines

  Issue 1737:  Fix use of Configure() contexts with the -c (clean) and -h
  (help) options by supporting the ability to *configure* whether or no
  configure context tests are executed during those modes.
........
  r2467 | stevenknight | 2007-10-01 16:58:21 -0500 (Mon, 01 Oct 2007) | 2 lines

  Update to TestCmd 0.30, with a new TestCmd.rmdir() method.
........
  r2468 | stevenknight | 2007-10-01 17:05:44 -0500 (Mon, 01 Oct 2007) | 4 lines

  Issue 1586:  Capture a test script for "ghost" entries in .sconsign files.
  Test cases by Morten Elo Peterson and Jason Orendorff, packaged by
  Gary Oberbrunner.
........
  r2469 | stevenknight | 2007-10-04 11:21:12 -0500 (Thu, 04 Oct 2007) | 4 lines

  When cloning a construction environment, have the clone record the
  re-binding of the methods that were added to the original construction
  environment, so that further clones have their methods re-bound as well.
........
  r2470 | stevenknight | 2007-10-05 13:02:34 -0500 (Fri, 05 Oct 2007) | 3 lines

  Refactor the Glob() code for efficiency and readability.  (Greg Noel)
  Refactor Glob() unit tests for platform-independence.
........
  r2471 | stevenknight | 2007-10-09 10:49:15 -0500 (Tue, 09 Oct 2007) | 2 lines

  Back out Glob() refactoring to avoid Repository breakage.
........
  r2472 | stevenknight | 2007-10-09 12:16:33 -0500 (Tue, 09 Oct 2007) | 3 lines

  Fix ToolInitializer-related infinite recursion when the BUILDERS dict
  and the environment attributes can get out of sync.
........
  r2473 | stevenknight | 2007-10-10 14:39:19 -0500 (Wed, 10 Oct 2007) | 4 lines

  Fix a race condition in the -j sub-test by using marker directories to
  make sure (?) that the two build scripts are actually executed in parallel
  (regardless of system load).
........
  r2474 | stevenknight | 2007-10-11 12:32:07 -0500 (Thu, 11 Oct 2007) | 4 lines

  Re-fix globbing on case-insensitive systems like Windows.  Slight
  efficiency improvements as well (avoiding unnecessary calls to
  fnmatch.filter()).
........
  r2475 | stevenknight | 2007-10-11 15:04:42 -0500 (Thu, 11 Oct 2007) | 3 lines

  Refactor the Node lookup logic to fix handling Windows drive letters
  after an initial '#'.
........
  r2476 | stevenknight | 2007-10-12 00:01:31 -0500 (Fri, 12 Oct 2007) | 2 lines

  Fix nested scope issues (for the benefit of older Python versions).
........
  r2477 | stevenknight | 2007-10-12 11:36:21 -0500 (Fri, 12 Oct 2007) | 2 lines

  Issue 1743:  Document '#' interpretation, with examples.
........
  r2478 | stevenknight | 2007-10-12 12:17:50 -0500 (Fri, 12 Oct 2007) | 3 lines

  Fix the ability of our default ActionFactory function to handle Nodes
  as input.
........
  r2479 | stevenknight | 2007-10-12 13:53:37 -0500 (Fri, 12 Oct 2007) | 4 lines

  Enhance Options() file execution to add the file's directory to sys.path
  (and remove it afterwards) and to add a __name__ variable that can be
  used for introspecting on the file's location.
........
  r2480 | stevenknight | 2007-10-14 17:57:09 -0500 (Sun, 14 Oct 2007) | 4 lines

  Remove unnecessary os.path.normpath() calls when looking up directories
  or files by checking for whether we can just tack on a single entry name
  to the already-normalized lookup path of the directory Node.
........
  r2481 | stevenknight | 2007-10-17 01:08:47 -0500 (Wed, 17 Oct 2007) | 2 lines

  Add a GetBuildFailures() function.
........
  r2482 | stevenknight | 2007-10-17 09:56:18 -0500 (Wed, 17 Oct 2007) | 2 lines

  Fix the GetBuildFailures() example in the man page.
........
  r2483 | stevenknight | 2007-10-17 10:54:21 -0500 (Wed, 17 Oct 2007) | 3 lines

  Use sys.exitfunc if there's no atexit module (Python 1.5.2).
  Sort the failure list for deterministic build output under system load.
........
  r2484 | stevenknight | 2007-10-20 12:33:07 -0500 (Sat, 20 Oct 2007) | 2 lines

  Use more efficient Decider() defaults instead of {Target,Source}Signatures().
........
  r2485 | stevenknight | 2007-10-20 17:42:27 -0500 (Sat, 20 Oct 2007) | 2 lines

  Windows portability in GetBuildFailures() test scripts.
........
  r2486 | stevenknight | 2007-10-20 20:46:26 -0500 (Sat, 20 Oct 2007) | 2 lines

  Windows portability:  rename internal copy.py script, use a stub instead of tar.
........
  r2487 | stevenknight | 2007-10-24 23:36:24 -0500 (Wed, 24 Oct 2007) | 4 lines

  Whenever a script configures SConsignFile(None), make sure it uses
  stub compiler and linker scripts, not the system ones, to avoid writing
  (or trying to write) .sconsign files in system directories.
........
  r2488 | stevenknight | 2007-10-26 13:57:38 -0500 (Fri, 26 Oct 2007) | 2 lines

  Issue 1764:  Fix test-script portability issues on Solaris.
........
  r2489 | stevenknight | 2007-10-27 07:37:37 -0500 (Sat, 27 Oct 2007) | 3 lines

  Issue 1757:  add a CheckTypeSize() call to Configure contexts
  (David Cournapeau).
........
  r2490 | stevenknight | 2007-10-28 07:58:30 -0500 (Sun, 28 Oct 2007) | 2 lines

  Python 1.5.2 compatibility:  no use of +=.
........
  r2491 | stevenknight | 2007-10-29 12:13:35 -0500 (Mon, 29 Oct 2007) | 3 lines

  Issue 1758:  Fix the SCons packaging build for use with shared-lib
  versions of Python and to avoid .egg-info naming issues.
........
  r2492 | stevenknight | 2007-10-29 14:09:57 -0500 (Mon, 29 Oct 2007) | 2 lines

  Document the "expect" argument to CheckTypeSize().  (David Cournapeau)
........
  r2493 | stevenknight | 2007-11-05 20:57:27 -0600 (Mon, 05 Nov 2007) | 2 lines

  Fix use of Glob() when a pattern is below an explicitly-named subdirectory.
........
  r2495 | stevenknight | 2007-11-12 22:58:12 -0600 (Mon, 12 Nov 2007) | 5 lines

  Add a get_sources() access method to avoid an O(n^2) problem when adding
  sources to an Executor object.  The old code weeded out duplicates
  whenever a new source was added; the new code only does that when the
  source is list going to be used.
........
  r2496 | stevenknight | 2007-11-15 12:19:55 -0600 (Thu, 15 Nov 2007) | 4 lines

  Redefine the $WINDOWSPROGMANIFESTSUFFIX and
  $WINDOWSSHLIBMANIFESTSUFFIX variables so they pick up changes to
  the underlying $SHLIBSUFFIX and $PROGSUFFIX variables.
........
  r2497 | stevenknight | 2007-11-18 17:11:52 -0600 (Sun, 18 Nov 2007) | 4 lines

  Support .status and .command attributes of BuildError exceptions.
  Change Action objects to return BuildError objects (not raise them)
  when an action fails.
........
  r2498 | stevenknight | 2007-11-19 07:27:16 -0600 (Mon, 19 Nov 2007) | 3 lines

  When converting .sconsign paths to Nodes, use the more efficient
  _lookup_abs() method.
........
  r2499 | stevenknight | 2007-11-25 00:18:20 -0600 (Sun, 25 Nov 2007) | 3 lines

  Move the reflection-checking is_under() logic from the .srcdir_list()
  method to the .srcdir_duplicate() method.
........
  r2500 | stevenknight | 2007-11-25 00:31:33 -0600 (Sun, 25 Nov 2007) | 2 lines

  Have the .srcnode() method use the .srcdir_list() method.
........
  r2501 | stevenknight | 2007-11-28 22:56:39 -0600 (Wed, 28 Nov 2007) | 3 lines

  Issue 1845:  Have single-source Builders (like Object()) return
  NodeList objects even when called with multiple files.
........
  r2502 | stevenknight | 2007-11-28 23:00:46 -0600 (Wed, 28 Nov 2007) | 2 lines

  Issue 1845:  Document the NodeList behavior w.r.t Python's += operator.
........
  r2503 | stevenknight | 2007-11-29 09:35:31 -0600 (Thu, 29 Nov 2007) | 3 lines

  Issue 1840:  Fix a lot of typos in the man page and Users' Guide.
  (Malte Helmert)
........
  r2504 | stevenknight | 2007-11-29 10:41:44 -0600 (Thu, 29 Nov 2007) | 3 lines

  Issue 1841:  Fix --implicit-cache spurious rebuilds and inefficiency
  when using Builders that produce multiple targets.  (Benoit Belley)
........
  r2505 | stevenknight | 2007-11-30 17:36:03 -0600 (Fri, 30 Nov 2007) | 3 lines

  Unit test fix for Python 1.5.2, which can't .extend() lists with
  UserList objects.
........
  r2506 | stevenknight | 2007-11-30 20:37:14 -0600 (Fri, 30 Nov 2007) | 2 lines

  Python 1.5.2 portability:  use string.join(), not ' '.join().
........
  r2507 | stevenknight | 2007-11-30 21:42:19 -0600 (Fri, 30 Nov 2007) | 3 lines

  When searching directory lists like $CPPPATH, don't make Dir Nodes for
  directories that don't exist on disk.
........
  r2508 | stevenknight | 2007-12-01 00:14:35 -0600 (Sat, 01 Dec 2007) | 2 lines

  Add a Requires() function for specifying order-only prerequisites.
........
  r2509 | stevenknight | 2007-12-01 07:32:24 -0600 (Sat, 01 Dec 2007) | 3 lines

  Handle absolute paths without infinite recursion in the new code that
  searches for implicit dependencies without creating unnecessary Dir Nodes.
........
  r2510 | stevenknight | 2007-12-03 15:11:56 -0600 (Mon, 03 Dec 2007) | 2 lines

  Restore the rel_path() method, for the benefit of SConscript files using it.
........
  r2511 | stevenknight | 2007-12-04 00:34:02 -0600 (Tue, 04 Dec 2007) | 4 lines

  User's Guide updates for the Big Signature refactoring, capturing mention
  of things that still need documenting, and other changes from re-running
  the examples through the latest code.
........
  r2512 | stevenknight | 2007-12-04 08:48:51 -0600 (Tue, 04 Dec 2007) | 3 lines

  Issue 1846:  allow building only part of the dependency graph when
  BuildDir(duplicate=0) is used.  (Benoit Belley)
........
  r2513 | stevenknight | 2007-12-06 05:02:56 -0600 (Thu, 06 Dec 2007) | 3 lines

  Have the code that avoids creating unnecessary Dir Nodes when searching
  $*PATH variables handle absolute paths with Windows drive letters.
........
  r2514 | stevenknight | 2007-12-08 07:44:15 -0600 (Sat, 08 Dec 2007) | 6 lines

  Issue 1852:  Make the default behavior of
  {Source,Target}Signatures('timestamp') equivalent to
  'timestamp-match', not 'timestamp-newer'.  Fix use of CacheDir with
  Decider('timestamp-newer') by updating the modification time when copying
  files from the cache.
........
  r2515 | stevenknight | 2007-12-08 08:23:02 -0600 (Sat, 08 Dec 2007) | 4 lines

  Update the mock compiler inin/sconsoutput to use $CPPPATH.
  Capture the ripple effect in the Troubleshooting appendix.
  Also add a -t option to the mock "touch" command.
........
  r2516 | stevenknight | 2007-12-08 09:16:11 -0600 (Sat, 08 Dec 2007) | 3 lines

  Update the Dependencies chapter for use of the Decider() function,
  and to now discourage use of SourceSignatures() and TargetSignatures().
........
  r2517 | stevenknight | 2007-12-08 12:31:10 -0600 (Sat, 08 Dec 2007) | 4 lines

  Issue 1721:  On Windows, wrap __builtin__.close() and __builtin__.file()
  to disable file handle inheritance on any files opened by SCons during
  the run.
........
  r2518 | stevenknight | 2007-12-11 17:33:20 -0600 (Tue, 11 Dec 2007) | 4 lines

  Prevent the _get_str() method from causing underlying stat() values
  to be cached if we're not yet saving the string representations of
  FS.Base() Nodes.
........
  r2519 | stevenknight | 2007-12-11 23:27:05 -0600 (Tue, 11 Dec 2007) | 4 lines

  Add a warning about the unreliability of -j if the pywin32 modules aren't
  available or are old and can't suppress file handle inheritance.
  Add a release note about the change to open() and file().
........
  r2520 | stevenknight | 2007-12-11 23:28:05 -0600 (Tue, 11 Dec 2007) | 2 lines

  Add an overlooked update, fix spelling.
........
  r2521 | stevenknight | 2007-12-12 09:12:42 -0600 (Wed, 12 Dec 2007) | 3 lines

  Use &TargetSignatures; (replace missing ampersand) in the title of
  that section.  Move the &Depends; section to before the &Ignore; section.
........
  r2522 | stevenknight | 2007-12-12 09:20:46 -0600 (Wed, 12 Dec 2007) | 3 lines

  Final documentation update for checkpoint release:  propagate .in changes
  to .xml files.
........
  r2523 | stevenknight | 2007-12-12 09:29:11 -0600 (Wed, 12 Dec 2007) | 2 lines

  Update release lines for new checkpoint release.
........

1 files changed, 464 insertions, 27 deletions

diff --git a/doc/man/scons.1 b/doc/man/scons.1
index 6f87b20..526a5a3 100644
--- a/doc/man/scons.1
+++ b/doc/man/scons.1
@@ -264,8 +264,8 @@ scons foo bar
 in which case only the specified targets will be built
 (along with any derived files on which they depend).
 
-Specifying "cleanup" targets in SConscript files is not
-necessary.  The 
+Specifying "cleanup" targets in SConscript files is not usually necessary.
+The 
 .B -c
 flag removes all files
 necessary to build the specified target:
@@ -1271,7 +1271,7 @@ These warnings are disabled by default.
 Search the specified repository for any input and target
 files not found in the local directory hierarchy.  Multiple
 .B -Y
-options may specified, in which case the
+options may be specified, in which case the
 repositories are searched in the order specified.
 
 .SH CONFIGURATION FILE REFERENCE
@@ -1340,7 +1340,7 @@ env = Environment(platform = my_platform)
 
 Additionally, a specific set of tools
 with which to initialize the environment
-may specified as an optional keyword argument:
+may be specified as an optional keyword argument:
 
 .ES
 env = Environment(tools = ['msvc', 'lex'])
@@ -1530,10 +1530,12 @@ Build rules are specified by calling a construction
 environment's builder methods.
 The arguments to the builder methods are
 .B target
-(a list of target files)
+(a list of targets to be built,
+usually file names)
 and
 .B source
-(a list of source files).
+(a list of sources to be built,
+usually file names).
 
 Because long lists of file names
 can lead to a lot of quoting,
@@ -1569,6 +1571,58 @@ env.Program(target = 'bar', env.Split('bar.c foo.c'))
 env.Program('bar', source = string.split('bar.c foo.c'))
 .EE
 
+Target and source file names
+that are not absolute path names
+(that is, do not begin with
+.B /
+on POSIX systems
+or 
+.B \\
+on Windows systems,
+with or without
+an optional drive letter)
+are interpreted relative to the directory containing the
+.B SConscript
+file being read.
+An initial
+.B #
+(hash mark)
+on a path name means that the rest of the file name
+is interpreted relative to
+the directory containing
+the top-level
+.B SConstruct
+file,
+even if the
+.B #
+is followed by a directory separator character
+(slash or backslash).
+
+Examples:
+
+.ES
+# The comments describing the targets that will be built
+# assume these calls are in a SConscript file in the
+# a subdirectory named "subdir".
+
+# Builds the program "subdir/foo" from "subdir/foo.c":
+env.Program('foo', 'foo.c')
+
+# Builds the program "/tmp/bar" from "subdir/bar.c":
+env.Program('/tmp/bar', 'bar.c')
+
+# An initial '#' or '#/' are equivalent; the following
+# calls build the programs "foo" and "bar" (in the
+# top-level SConstruct directory) from "subdir/foo.c" and
+# "subdir/bar.c", respectively:
+env.Program('#foo', 'foo.c')
+env.Program('#/bar', 'bar.c')
+
+# Builds the program "other/foo" (relative to the top-level
+# SConstruct directory) from "subdir/foo.c":
+env.Program('#other/foo', 'foo.c')
+.EE
+
 When the target shares the same base name
 as the source and only the suffix varies,
 and if the builder method has a suffix defined for the target file type,
@@ -1665,15 +1719,16 @@ to the Python module:
 from SCons.Script import *
 .EE
 
-All builder methods return a list of Nodes
-that represent the target or targets that will be built.
+All builder methods return a list-like object
+containing Nodes that
+represent the target or targets that will be built.
 A
 .I Node
 is an internal SCons object
 which represents
 build targets or sources.
 
-The returned Node(s)
+The returned Node-list object
 can be passed to other builder methods as source(s)
 or passed to any SCons function or method
 where a filename would normally be accepted.
@@ -1712,7 +1767,7 @@ for object in objects:
 
 Or you can use the
 .BR Flatten ()
-supplied by scons
+function supplied by scons
 to create a list containing just the Nodes,
 which may be more convenient:
 
@@ -1724,6 +1779,40 @@ for object in objects:
     print str(object)
 .EE
 
+Note also that because Builder calls return
+a list-like object, not an actual Python list,
+you should
+.I not
+use the Python
+.B +=
+operator to append Builder results to a Python list.
+Because the list and the object are different types,
+Python will not update the original list in place,
+but will instead create a new Node-list object
+containing the concatenation of the list
+elements and the Builder results.
+This will cause problems for any other Python variables
+in your SCons configuration
+that still hold on to a reference to the original list.
+Instead, use the Python
+.B .extend()
+method to make sure the list is updated in-place.
+Example:
+
+.ES
+object_files = []
+
+# Do NOT use += as follows:
+#
+#    object_files += Object('bar.c')
+#
+# It will not update the object_files list in place.
+#
+# Instead, use the .extend() method:
+object_files.extend(Object('bar.c'))
+
+.EE
+
 The path name for a Node's file may be used
 by passing the Node to the Python-builtin
 .B str()
@@ -3303,14 +3392,14 @@ foo = env.FindFile('foo', ['dir1', 'dir2'])
 .RI FindInstalledFiles( )
 .TP
 .RI env.FindInstalledFiles( )
-Returns the list of targets setup by the
+Returns the list of targets set up by the
 .B Install()
 or
 .B InstallAs()
 builders.
 
 This function serves as a convenient method to select the contents of
-a Binary Package.
+a binary package.
 
 Example:
 
@@ -3338,7 +3427,7 @@ Returns the list of nodes which serve as the source of the built files.
 It does so by inspecting the dependency tree starting at the optional
 argument
 .B node
-which defaults to the '"."'-node. It will then return all leafs of
+which defaults to the '"."'-node. It will then return all leaves of
 .B node.
 These are all children which have no further children.
 
@@ -3453,6 +3542,111 @@ for object in Flatten(objects):
 .EE
 
 '\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.TP 
+.RI GetBuildFailures()
+Returns a list of exceptions for the
+actions that failed while
+attempting to build targets.
+Each element in the returned list is a
+.B BuildError
+object
+with the following attributes
+that record various aspects
+of the build failure:
+
+.B .node
+The node that was being built
+when the build failure occurred.
+
+.B .status
+The numeric exit status
+returned by the command or Python function
+that failed when trying to build the
+specified Node.
+
+.B .errstr
+The SCons error string
+describing the build failure.
+(This is often a generic
+message like "Error 2"
+to indicate that an executed
+command exited with a status of 2.)
+
+.B .filename
+The name of the file or
+directory that actually caused the failure.
+This may be different from the
+.B .node
+attribute.
+For example,
+if an attempt to build a target named
+.B sub/dir/target
+fails because the
+.B sub/dir
+directory could not be created,
+then the
+.B .node
+attribute will be
+.B sub/dir/target
+but the
+.B .filename
+attribute will be
+.BR sub/dir .
+
+.B .executor
+The SCons Executor object
+for the target Node
+being built.
+This can be used to retrieve
+the construction environment used
+for the failed action.
+
+.B .action
+The actual SCons Action object that failed.
+This will be one specific action
+out of the possible list of
+actions that would have been
+executed to build the target.
+
+.B .command
+The actual expanded command that was executed and failed,
+after expansion of
+.BR $TARGET ,
+.BR $SOURCE ,
+and other construction variables.
+
+Note that the
+.BR GetBuildFailures ()
+function
+will always return an empty list
+until any build failure has occurred,
+which means that
+.BR GetBuildFailures ()
+will always return an empty list
+while the
+.B SConscript
+files are being read.
+Its primary intended use is
+for functions that will be
+executed before SCons exits
+by passing them to the
+standard Python
+.BR atexit.register ()
+function.
+Example:
+
+.ES
+import atexit
+
+def print_build_failures():
+    from SCons.Script import GetBuildFailures
+    for bf in GetBuildFailures():
+        print "%s failed: %s" % (bf.node, bf.errstr)
+
+atexit.register(print_build_failures)
+.EE
+
+'\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
 .TP
 .RI GetBuildPath( file ", [" ... ])
 .TP
@@ -3498,6 +3692,111 @@ options from a SConscript file. See
 .IR SetOption () 
 for a description of the options available.
 
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.TP
+.RI Glob( pattern ", [" ondisk ", " source ", " strings ])
+.TP
+.RI env.Glob( pattern ", [" ondisk ", " source ", " strings ])
+Returns Nodes (or strings) that match the specified
+.IR pattern ,
+relative to the directory of the current
+.B SConscript
+file.
+The
+.BR env.Glob ()
+form performs string substition on
+.I pattern
+and returns whatever matches
+the resulting expanded pattern.
+
+The specified
+.I pattern
+uses Unix shell style metacharacters for matching:
+
+.ES
+  *       matches everything
+  ?       matches any single character
+  [seq]   matches any character in seq
+  [!seq]  matches any char not in seq
+.EE
+
+Character matches do
+.I not
+span directory separators.
+
+The
+.BR Glob ()
+knows about
+repositories
+(see the
+.BR Repository ()
+function)
+and source directories
+(see the
+.BR BuildDir ()
+function)
+and
+returns a Node (or string, if so configured)
+in the local (SConscript) directory
+if matching Node is found
+anywhere in a corresponding
+repository or source directory.
+
+The
+.B ondisk
+argument may be set to
+.B False
+(or any other non-true value)
+to disable the search for matches on disk,
+thereby only returning matches among
+already-configured File or Dir Nodes.
+The default behavior is to
+return corresponding Nodes
+for any on-disk matches found.
+
+The
+.B source
+argument may be set to
+.B True
+(or any equivalent value)
+to specify that,
+when the local directory is a
+.BR BuildDir (),
+the returned Nodes should be from the
+corresponding source directory,
+not the local directory.
+
+The
+.B strings
+argument may be set to
+.B True
+(or any equivalent value)
+to have the
+.BR Glob ()
+function return strings, not Nodes,
+that represent the matched files or directories.
+The returned strings will be relative to
+the local (SConscript) directory.
+(Note that This may make it easier to perform
+arbitrary manipulation of file names,
+but if the returned strings are
+passed to a different
+.B SConscript
+file,
+any Node translation will be relative
+to the other
+.B SConscript
+directory,
+not the original
+.B SConscript
+directory.)
+
+Example:
+
+.ES
+Program('foo', Glob('*.c'))
+.EE
+
 '\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
 '\".TP
 '\".RI GlobalBuilders( flag )
@@ -4267,6 +4566,29 @@ method.
 
 '\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
 .TP
+.RI Requires( target ", " prerequisite )
+.TP
+.RI env.Requires( target ", " prerequisite )
+Specifies an order-only relationship
+between the specified target file(s)
+and the specified prerequisite file(s).
+The prerequisite file(s)
+will be (re)built, if necessary,
+.I before
+the target file(s),
+but the target file(s) do not actually
+depend on the prerequisites
+and will not be rebuilt simply because
+the prerequisite file(s) change.
+
+Example:
+
+.ES
+env.Requires('foo', 'file-that-must-be-built-before-foo')
+.EE
+
+'\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+.TP
 .RI Return([ vars "... , " stop= ])
 By default,
 this stops processing the current SConscript
@@ -4875,7 +5197,16 @@ source_nodes = env.subst('$EXPAND_TO_NODELIST',
 .RI SourceSignatures( type )
 .TP
 .RI env.SourceSignatures( type )
-This function tells
+Note:  Although it is not yet officially deprecated,
+use of this function is discouraged.
+See the
+.BR Decider ()
+function for a more flexible and straightforward way
+to configure SCons' decision-making.
+
+The
+.BR SourceSignatures ()
+function tells
 .B scons
 how to decide if a source file
 (a file that is not built from any other files)
@@ -4906,8 +5237,12 @@ the last time it was used to rebuild a particular target file.
 means
 .B scons
 decides that a source file has changed
-if its timestamp (modification time) is newer than
+if its timestamp (modification time) has changed since
 the last time it was used to rebuild a particular target file.
+(Note that although this is similar to the behavior of Make,
+by default it will also rebuild if the dependency is
+.I older
+than the last time it was used to rebuild the target file.)
 
 There is no different between the two behaviors
 for Python
@@ -4993,7 +5328,16 @@ Tag( 'file2.txt', DOC )
 .RI TargetSignatures( type )
 .TP
 .RI env.TargetSignatures( type )
-This function tells
+Note:  Although it is not yet officially deprecated,
+use of this function is discouraged.
+See the
+.BR Decider ()
+function for a more flexible and straightforward way
+to configure SCons' decision-making.
+
+The
+.BR TargetSignatures ()
+function tells
 .B scons
 how to decide if a target file
 (a file that
@@ -5040,8 +5384,12 @@ rebuilt with exactly the same contents as the last time.
 means
 .B scons
 decides that a target file has changed
-if its timestamp (modification time) is newer than
+if its timestamp (modification time) has changed since
 the last time it was used to rebuild some other target file.
+(Note that although this is similar to the behavior of Make,
+by default it will also rebuild if the dependency is
+.I older
+than the last time it was used to rebuild the target file.)
 
 .B "source"
 means
@@ -5476,7 +5824,7 @@ defined construction variables:
 '\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
 '\" BEGIN GENERATED CONSTRUCTION VARIABLE DESCRIPTIONS
 '\"
-'\" The descriptions below of the various SCons contruction variables
+'\" The descriptions below of the various SCons construction variables
 '\" are generated from the .xml files that live next to the various
 '\" Python modules in the build enginer library.  If you're reading
 '\" this [gnt]roff file with an eye towards patching this man page,
@@ -5491,7 +5839,7 @@ defined construction variables:
 '\"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
 '\" END GENERATED CONSTRUCTION VARIABLE DESCRIPTIONS
 '\"
-'\" The descriptions above of the various SCons contruction variables
+'\" The descriptions above of the various SCons construction variables
 '\" are generated from the .xml files that live next to the various
 '\" Python modules in the build enginer library.  If you're reading
 '\" this [gnt]roff file with an eye towards patching this man page,
@@ -5554,9 +5902,9 @@ command line option.
 The following methods can be used to perform checks:
 
 .TP
-.RI Configure( env ", [" custom_tests ", " conf_dir ", " log_file ", " config_h ])
+.RI Configure( env ", [" custom_tests ", " conf_dir ", " log_file ", " config_h ", " clean ", " help])
 .TP
-.RI env.Configure([ custom_tests ", " conf_dir ", " log_file ", " config_h ])
+.RI env.Configure([ custom_tests ", " conf_dir ", " log_file ", " config_h ", " clean ", " help])
 This creates a configure context, which can be used to perform checks.
 .I env
 specifies the environment for building the tests.
@@ -5604,6 +5952,30 @@ and some target that depends on the
 .I config_h
 file is being built.
 
+The optional
+.B clean
+and
+.B help
+arguments can be used to suppress execution of the configuration
+tests when the
+.B -c/--clean
+or
+.B -H/-h/--help
+options are used, respectively.
+The default behavior is always to execute
+configure context tests,
+since the results of the tests may
+affect the list of targets to be cleaned
+or the help text.
+If the configure tests do not affect these,
+then you may add the
+.B clean=False
+or
+.B help=False
+arguments
+(or both)
+to avoid unnecessary test execution.
+
 .EE
 A created
 .B Configure
@@ -5843,6 +6215,42 @@ if conf.CheckLibWithHeader( 'qt', 'qapp.h', 'c++', 'QApplication qapp(0,0);' ):
 env = conf.Finish() 
 .EE
 
+.TP
+.RI Configure.CheckTypeSize( self ", " type_name ", [" header ", " language ", " expect ])
+Checks for the size of a type defined by
+.BR typedef .
+.I type_name
+specifies the typedef name to check for.
+The optional
+.I header
+argument is a string
+that will be
+placed at the top
+of the test file
+that will be compiled
+to check if the function exists;
+the default is empty.
+The optional
+.I language
+argument should be
+.B C
+or
+.B C++
+and selects the compiler to be used for the check;
+the default is "C".
+The optional
+.I expect
+argument should be an integer.
+If this argument is used,
+the function will only check whether the type
+given in type_name has the expected size (in bytes).
+For example,
+.B "CheckTypeSize('short', expect = 2)"
+will return success only if short is two bytes.
+
+.ES
+.EE
+
 .EE
 You can define your own custom checks. 
 in addition to the predefined checks.
@@ -5990,9 +6398,13 @@ written. For example, libraries needed for the build may be in non-standard
 locations, or site-specific compiler options may need to be passed to the
 compiler. 
 .B scons
-provides a mechanism for overridding construction variables from the
-command line or a text-based SConscript file through an Options
-object. To create an Options object, call the Options() function:
+provides an Options object for overridding construction variables
+on the command line:
+.ES
+$ scons VARIABLE=foo
+.EE
+The variable values can also be specified in a text-based SConscript file.
+To create an Options object, call the Options() function:
 
 .TP
 .RI Options([ files "], [" args ])
@@ -6091,8 +6503,17 @@ opt.AddOptions(
 .RI Update( env ", [" args ])
 This updates a construction environment
 .I env
-with the customized construction variables. Normally this method is not
-called directly, but is called indirectly by passing the Options object to
+with the customized construction variables.
+Any specified variables that are
+.I not
+configured for the Options object
+will be saved and may be
+retrieved with the
+.BR UnknownOptions ()
+method, below.
+
+Normally this method is not called directly,
+but is called indirectly by passing the Options object to
 the Environment() function:
 
 .ES
@@ -6105,6 +6526,7 @@ when the Options object was created
 are executed as Python scripts,
 and the values of (global) Python variables set in the file
 are added to the construction environment.
+
 Example:
 
 .ES
@@ -6112,6 +6534,21 @@ CC = 'my_cc'
 .EE
 
 .TP
+.RI UnknownOptions( )
+Returns a dictionary containing any
+variables that were specified
+either in the files or the dictionary
+with which the Options object was intialized,
+but for which the Options object was
+not configured.
+
+.ES
+env = Environment(options=opts)
+for key, value in opts.UnknownOptions():
+    print "unknown variable:  %s=%s" % (key, value)
+.EE
+
+.TP
 .RI Save( filename ", " env )
 This saves the currently set options into a script file named  
 .I filename
@@ -8436,7 +8873,7 @@ prefix and suffix for the current platform
 (for example, 'liba.a' on POSIX systems,
 'a.lib' on Windows).
 
-.SS Customizing contruction variables from the command line.
+.SS Customizing construction variables from the command line.
 
 The following would allow the C compiler to be specified on the command
 line or in the file custom.py.