mingw bison error when building gdb git source

[asmwarrior <asmwarrior@gmail.com>]

I have a question on building gdb under Msys+mingw

when I build gdb source from git (which I do a git clone from 
git://sourceware.org/git/gdb.git). I get an build error:

-----------------------------------------------------------------
make[2]: Entering directory `/f/build_gdb/gdb/gdbgit/build/sim'
make[2]: Leaving directory `/f/build_gdb/gdb/gdbgit/build/sim'
make[2]: Entering directory `/f/build_gdb/gdb/gdbgit/build/gdb'
CONFIG_HEADERS=config.h:config.in \
           CONFIG_COMMANDS="default depdir" \
           CONFIG_FILES= \
           CONFIG_LINKS= \
           /bin/sh config.status
config.status: creating config.h
config.status: config.h is unchanged
config.status: executing default commands
config.status: executing depdir commands
rm -f c-exp.c c-exp.c.tmp
/bin/sh ../../gdb/gdb/../ylwrap ../../gdb/gdb/c-exp.y y.tab.c c-exp.c -- 
bison -
y  && mv c-exp.c c-exp.c.tmp \
                 || (rm -f c-exp.c; false)
rm -f cp-name-parser.c cp-name-parser.c.tmp
/bin/sh ../../gdb/gdb/../ylwrap ../../gdb/gdb/cp-name-parser.y y.tab.c 
cp-name-p
arser.c -- bison -y  && mv cp-name-parser.c cp-name-parser.c.tmp \
                 || (rm -f cp-name-parser.c; false)
rm -f objc-exp.c objc-exp.c.tmp
/bin/sh ../../gdb/gdb/../ylwrap ../../gdb/gdb/objc-exp.y y.tab.c 
objc-exp.c -- b
ison -y  && mv objc-exp.c objc-exp.c.tmp \
                 || (rm -f objc-exp.c; false)
conflicts: 18 shift/reduce, 9 reduce/reduce
E:\code\msys\MSYS-20110112\msys\bin\bison.exe: cannot open file 
`/usr/share/biso
n/m4sugar/m4sugar.m4': No such file or directory
E:\code\msys\MSYS-20110112\msys\bin\bison.exe: cannot open file 
`/usr/share/biso
n/m4sugar/m4sugar.m4': No such file or directory
conflicts: 5 shift/reduce
E:\code\msys\MSYS-20110112\msys\bin\bison.exe: cannot open file 
`/usr/share/biso
n/m4sugar/m4sugar.m4': No such file or directory
make[2]: *** [c-exp.c] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [cp-name-parser.c] Error 1
make[2]: *** [objc-exp.c] Error 1
make[3]: Entering directory `/f/build_gdb/gdb/gdbgit/build/gdb'
make[4]: Entering directory `/f/build_gdb/gdb/gdbgit/build/gdb/gnulib'
make  all-recursive
------------------------------------------------------------------------

The message shows that bison under Msys does not works quite well.

But when I download the gdb snapshot from the ftp
ftp://sourceware.org/pub/gdb/snapshots/

I just unzip the snapshot, and use the same configure option, and the 
build stage works fine, and no such error.

So, I just think that when building the snapshot, we do not need bison.
In fact the file c-exp.c is built from c-exp.y.
In the snapshot of gdb, c-exp.y already exists.
But in the gdb git source, there are only c-exp.y, so bison is needed to 
build the associated c-exp.c.


So, my question is:
Can some bison exports help to solve this problem? it seems bison under 
Msys does not works quite well.

Or is it possible save the c-exp.c in the gdb repository, so that we 
don't need bison to build it.

thanks.

asmwarrior
ollydbg from code::blocks' forum