From: ebling AT premiernet DOT net (Stuart Ebling)
Newsgroups: comp.os.msdos.djgpp
Subject: Linking DJGPP v2.0 compiled libraries with v2.01 built executables
Date: Tue, 31 Dec 1996 20:49:07 GMT
Organization: PremierNET, Inc.
Lines: 36
Message-ID: <32c97c3e.9165938@nntp.premiernet.net>
NNTP-Posting-Host: slip02.premiernet.net
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

Hello,
I have recently downloaded and installed the gnat 305 (Ada compiler)
distribution for MSDOS (that is built with DJGPP 2.0 and uses gcc and
some other executables from the DJ 2.0 release.) Since I already had
DJ 2.01 installed and running I wanted to use that setup along with
the gnat components.

I installed the distribution (being very careful not to let unzip
replace any existing files). The only problem that I ran across came
in the linking stage (an undefined reference to __dummy in the
libgnat.a library). I discovered that '__dummy' is defined in the
libgcc.a that was ditributed with the gnat release. Examining the two
distributions of libgcc, shows that (by module name anyway) _dummy.o
is the only difference.

Therefore I extracted the _dummy.o file from the gnat distributed
libgcc and added it to the DJ 2.01 supplied libgcc.a  
I can now successfully produce executables from Ada source
(the supplied examples compile and execute correctly.)

The question I have is, should I anticipate any problems mixing an
object module compiled with DJ 2.0 with an executable built using the
DJ 2.01 'suite'.  Not necessarily with the gnat 305 distribution, but
in general. Keep in mind that all the Ada object modules and the
libgnat.a were also built with DJ v2.0.

BTW, I don't have available (yet) the gnat 305 source code since the
307 version has just been released (DOS release in a few days but
still built with v2.0) so the source available is 3.07, so I can't
just recompile the libraries and objects with 2.01, though I do expect
to be able to track down the 3.05 source shortly.

Thanks in advance.
--
Stuart Ebling
ebling AT premiernet DOT net