[Boost-build] Patch for making Boost Jam work correctly with Windows short file names.

From: Jurko Gospodnetiæ (jurko.gospodnetic_at_[hidden])
Date: 2008-04-29 19:20:19

   Hi all.

   I am attaching a patch and a regression test related to making Boost 
Jam handle Windows short file names correctly.

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   Description:
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   Fixed a bug causing Boost Jam not to handle target file names 
specified as both short and long file names correctly. Bug fixed by 
making bindtarget() function map names to TARGETs by using their long 
file names.

   When scanning directories and creating a list of all their content 
(filent.c) it would identify all the located files and folders using 
their long file names. On the other hand, referencing a target using its 
short file name inside a Jam script caused Boost Jam to reference those 
files twice using two separate TARGET structures - one identified using 
the file's short name and one using the file's long name.

   One bad example was the MkDir which would always attempt to create a 
folder identified by its short name even if that folder already existed 
(due to the NOUPDATE rule getting applied on the incorrect TARGET).

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   The change does not affect targets whose names do not represent 
existing file names.

   Also, it seems to me that the short_path_to_long_path() call in 
file_dirscan() in the filent.c module should most likely be moved to 
file_info() in the filesys.c module. This would make mapping file names 
to file_info_t & TARGET structures consistent. However, I have not done 
this in this patch just to make the patch as minimal as possible.

   Attached tests have been disabled (do nothing) on non Windows platforms.

   Could someone please review this and let me know if I can go ahead 
and commit?

   Best regards,
     Jurko Gospodnetiæ