[gps-devel] Re: [gps-users] Problem starting ACT's binary of GPS 1.4.0 on Debian GNU/Linux

[Chris Douty]

Howdy,

I built everything from source using my version of GNAT 5.01 formerly 
available from ACT's libre CVS server on RedHat Linux 9.  (I'm quite 
happy with the compiler BTW.  I wish ACT hadn't closed CVS access, 
although I understand why.  FSF gcc isn't quite ready yet.)  Gps seems 
to work OK.  I certainly don't get the same link error you do.  This is 
probably a gps-devel question so I have redirected to that list.

My libgtkada.a looks like this:
 > nm libgtkada.a | grep gdk_notify_type
00000099 D gdk__event__gdk_notify_typeN
000002a0 R gdk__event__gdk_notify_typeS

 > strings libgtkada-2.2.so.1 |grep gdk_notify_type
gdk__event__gdk_notify_typeS
gdk__event__gdk_notify_typeN

I don't know how the names are mangled in GNAT, but I'd say that what 
you used on GtkAda 2.2.1 is different than what ACT themselves got.  
That would make me a little nervous.  I honestly don't known how 
compatible code, especially shared libraries, compiled with one version 
of a compiler is supposed to be with some other binary.  Given Ada's 
semantic rules I'd almost think that everything should be built with 
the same compiler and "compatible" switches.  That's kinda hard for 
random open-source projects and binary packages.  :-|

On Thursday, December 4, 2003, at 10:59 AM, Ludovic Brenta wrote:
> I am having a problem starting GPS from the binary distributed at
> ACT's libre web site.  I've compiled and installed GtkAda 2.2.1.  I've
> compiled and linked GPS against it, and it runs OK.  But the GPS
> compiled by ACT fails to start.  Here is what I get:

[snip]

> The GtkAda shared library doesn't have the debugging symbols, but the
> static library (in the `libgtkada2-dev' package I made) does:
>
> $ nm /usr/lib/libgtkada2.a | grep gdk_notify_type
> 000000ad D gdk__event__gdk_notify_typeI
> 000002f4 R gdk__event__gdk_notify_typeS
>
> I have not been able to find a binary distribution of GtkAda 2.2.1 for
> GNU/Linux to compare these results with.  Is this a problem of name
> mangling?  Does it occur on other distributions?  Is there something
> wrong with my package of GtkAda?  I would like it to be compatible
> with binaries compiled by other people, possibly on different
> distributions, and I am prepared to make any changes necessary to that
> effect.

-- 
Christopher Douty <Chris_Douty@ampexdata.com> +1-650-367-3129
Senior Engineer, Software & Systems  - AMPEX Data Systems Corp.