Date: Sun, 15 Aug 1999 22:29:56 -0700 (PDT)
From: Takis Psarogiannakopoulos
Subject: DG/UX dmalloc
Dear Gray,
I am writing this relating to the DG/ux port (ix86) of dmalloc
library. I am responsible for the DG/ux X11R6.3 and I am designing a
new Xserver with multiple threads, so I want to use your dmalloc, as a
replacemnet for the crap system DG/ux library. I am curious who wrote
to you that dmalloc (as is) will work in DG/ux. Firstly the threads
library for DG/ux "-lthread ", (configure , configure.in) should be
something like
AC_CHECK_LIB(thread, __d10_pthread_mutex_init, LIBTHREAD="-lthread"
DG_THREAD_FLAG="-D_POSIX4A_DRAFT10_SOURCE")
(there is no pthread_create , pthread_mutex_init or ... inside
-lthread)
and the functions sould be detected by , say,
AC_CHECK_FUNCS(__d10_pthread_mutex_init) ...etc
As the DG/ux header pthread.h is _not_ a desent one , we need probably
to define somewhere (in conf.h.in ?) something like
#if defined(DGUX)
#include <pthread.h>
#define _USING_POSIX4A_DRAFT10 1
#endif
and then
#define __d10_pthread_mutex_init mutex_init
etc ... (for the others).
Also in the above AC_CHECK_LIB(thread ...) to add (for the _d10__xxx
of DG/ux) a special flag like
DG_THREAD_FLAG="-D_POSIX4A_DRAFT10_SOURCE"
(as I did already)
which we want to append in the Makefile as
AC_SUBST(DG_THREAD_FLAG)
and add it to the standard CFLAGS as
DG_THREAD_FLAG = @DG_THREAD_FLAG@
CFLAGS = ... $(DG_THREAD_FLAG)
so it will be empty for other OS ...
I confess these are not great changes, but as dmalloc is it will not
detect lthread, and also neither of the pthread functions!
Finnaly the correct CFLAGS for DG/ux are
-DDGUX -D_DGUX_SOURCE -D_POSIX4A_DRAFT10_SOURCE
but I guess one can pass these to configure when it executes
it. However looking for the header dg_sys_info.h (which obviously is a
DG/ux particular header , not in any other OS) like
AC_CHECK_HEADER(dg_sys... )
we can have in the configure.in something like $ac_is_dgux=yes,no and
accordingly set the DG/ux CFLAGS, so the user doesnt need to know the
correct configuration command. If you want me to submit a patch drop
me an e-mail.
Regards,
Takis
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