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From: Juan Manuel Guerrero <juan DOT guerrero AT gmx DOT de>
To: Eli Zaretskii <eliz AT gnu DOT org>
Subject: Re: Difficulries with GDB 7.2 compiled with DJGPP
Date: Wed, 19 Jan 2011 19:25:46 +0100
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Am Mittwoch, 19. Januar 2011 schrieb Eli Zaretskii:
> > From: Juan Manuel Guerrero <juan DOT guerrero AT gmx DOT de>
> > Date: Wed, 19 Jan 2011 00:16:01 +0100
> > 
> > The reason why the GDB produced with DJGPP 2.04 is brocken is that the go32-nat.o
> > and i386-nat.o files are not compiled.  This is because go32.mh snippet is not
> > included to the gdb/Makefile by the configure script.  The script checks for
> > host system/build system = i786-pc-msdosdjgpp and for target system = i586-pc-msdosdjgpp
> > As can be seen target and host system does not match and the configure scripts
> > decides to build a cross debugger or something else.
> > The reason is that config.sub has the i586-pc-msdosdjgpp value hardcoded and
> > this does not match the value returned by config.sub.
> 
> Thanks for investigating this snafu.
> 
> How come the v2.03 build avoided this issue?


config.sub produces for an input string that contains "djgpp" the hardcoded
output string "i586-pc-msdosdjgpp".  config.guess uses uname to detect the
processer type.  This script concatenates the output produced by "uname -m"
together with the string "pc-msdosdjgpp".  The 2.04 version of uname returns
"i786" but the 2.03 version of uname returns "i586".  In those cases we get for
the 2.04 version:  i786-pc-msdosdjgpp and for
the 2.03 version:  i586-pc-msdosdjgpp.
It seems to be that the djgpp support for config.[sub|guess] stopped in those
days when the 2.03 version of uname.

Regards,
Juan M. Guerrero