Cannot build jam using MINGW

[ysv_]

When I'm triing to build jam I'v got error messages:
======================================
.cc bin.mingwx86\jam
C:\DOCUME~1\SERGIY~1\LOCALS~1\Temp/ccCqjaaa.o
(.text+0x12f):timestamp.c: undefine
d reference to `file_time'
C:\DOCUME~1\SERGIY~1\LOCALS~1\Temp/ccCqjaaa.o
(.text+0x2cd):timestamp.c: undefine
d reference to `file_archscan'
C:\DOCUME~1\SERGIY~1\LOCALS~1\Temp/ccCqjaaa.o
(.text+0x315):timestamp.c: undefine
d reference to `file_dirscan'
C:\DOCUME~1\SERGIY~1\LOCALS~1\Temp/ccimlaaa.o
(.text+0x131c):builtins.c: undefine
d reference to `file_dirscan'
    gcc    -o bin.mingwx86\jam  -DNDEBUG -
DOPT_HEADER_CACHE_EXT -DOPT_GRAPH_DEBU
G_EXT -DOPT_SEMAPHORE -
DOPT_FIX_TARGET_VARIABLES_EXT -
DOPT_IMPROVED_PATIENCE_EXT
 -DYYSTACKSIZE=5000  -s -O3 -finline-functions -
DMINGW   command.c compile.c exp
and.c glob.c hash.c hcache.c headers.c hdrmacro.c 
jam.c jambase.c jamgram.c list
s.c make.c make1.c newstr.c option.c parse.c regexp.c 
rules.c scan.c search.c su
bst.c timestamp.c variable.c modules.c strings.c 
filesys.c builtins.c pwd.c exec
unix.c fileunix.c pathunix.c
...failed .cc bin.mingwx86\jam...
...failed updating 1 target...
=========================================
When I look into build.sh and jam.h I've understood the 
problem is in definition of MINGW in jam.h
# define OSMAJOR "MINGW=true"
# define OSMINOR "OS=MINGW"
# define OS_NT
In build.jam some files are not included because MINGW 
is not NT and because MINGW is not UNIX.
Now I decide this by inserting everything where I found 
$(NT) check additional check for MINGW. But I think it 
should be better decision.

[René Rivera]

Logged In: YES 
user_id=33595

Not sure how you are attempting to build BJam. But doing:

.\build.bat mingw

Works with the current CVS state to build with mingw.
Perhaps you could clarify how you are building and what
version of Boost+BJam you are building?

[ysv_]

Logged In: YES 
user_id=779069

I use .\build.bat mingw to build jam version 3.1.4 from boost 
1.30.0.

[René Rivera]

Logged In: YES 
user_id=33595

OK thanks. This is already fixed. The fix is to not consider
MINGW as an OS. See:

http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/boost/boost/tools/build/jam_src/build.bat?rev=1.10&content-type=text/vnd.viewcvs-markup

and

http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/boost/boost/tools/build/jam_src/build.jam?rev=1.21&content-type=text/vnd.viewcvs-markup