missing routine from A/UX library?

[Richard Todd]

beser at aplcomm.JHUAPL.EDU (Nick Beser) writes:
>#include <sys/types.h>
>#include <dirent.h>

>however, when linking the program, the linker states that rewinddir is
>missing. The man page on rewinddir suggests that #include<dirent.h> is 
>ok to use. Any Ideas what could be going on? By substituting 

Yeah.  The problem is that rewinddir is actually a macro, not a function, and
it's defined in sys/dir.h (which is included by dirent.h, so the two are 
equivalent)---however, it's defined inside of a maze of Stupid Apple Ifdefs.
Actually, there are two problems--#1, that the Apple include files are a 
twisty turny maze of Stupid Preprocessor Tricks such that most programs won't
compile unless the _SYSV_SOURCE and _BSD_SOURCE preprocessor macros are
defined, and #2, while cc by default *does* turn on those preprocessor flags,
gcc does not.  You can either fix gcc to turn these on by default (it's a 
fairly simple patch to config/tm-aux.h in the GCC source), or stick 
   -D_SYSV_SOURCE -D_BSD_SOURCE
in the CFLAGS line in the Makefile.  

>#include <sys/dir.h> I get it to link, however the program bombs
>as soon as it runs. The first time I run it from the window, I get
>an openning of the xxgdb window, but the program exits right away.
>If I try it again, it just returns without openning a window at all.

Ah.  This sounds like the dreaded 4.2-signal problem (programs that expect 
4.[23]BSD signal semantics failing catastrophically on A/UX, where the default
is SysV signal semantics).  Stick a call to "set42sig()" at the beginning 
of the main function.  

>Has anyone been successfull in getting xxgdb operating on A/UX?

Well, I haven't :-(.  The problem I ran into was that when you issue a 
gdb command, the gdb subprocess goes into an infinite loop, printing its
prompt over and over.  I didn't have time to look into exactly why it does
this, so I gave up on it.  If you figure out what the problem is, let us all
know :-).  
--
Richard Todd	rmtodd at uokmax.ecn.uoknor.edu  rmtodd at chinet.chi.il.us
	rmtodd at servalan.uucp
"We're thinking about upgrading from SunOS 4.1.1 to SunOS 3.5."--Henry Spencer