gnome-ppp & login_tty symbol on Linux

[Laurent Guerby <guerby club-internet fr>]

I got linkage error while building gnome-ppp:

> gcc -g -O2 -o gnome-ppp account-window.o dial-window.o main.o misc.o -rdynamic -lgnomeui -lart_lgpl -lgdk_imlib -lSM -lICE -lgtk -lgdk -lgmodule -lXext -lX11 -lgnome -lgnomesupport -lesd -laudiofile -lm -ldb -lglib -ldl -rdynamic -L/home/guerby/install/cvs/lib -L/usr/X11R6/lib ../gnome-ppp/libgnome_ppp/libgnome_ppp.a -lzvt -lm
> /home/guerby/install/cvs/lib/libzvt.so: undefined reference to `login_tty'
> make[3]: *** [gnome-ppp] Error 1
> make[3]: Leaving directory `/home/guerby/work/cvs/gnome-network/tmp/gnome-ppp'
> make[2]: *** [all-recursive] Error 1
> make[2]: Leaving directory `/home/guerby/work/cvs/gnome-network/tmp/gnome-ppp'
> make[1]: *** [all-recursive] Error 1
> make[1]: Leaving directory `/home/guerby/work/cvs/gnome-network/tmp'
> make: *** [all-recursive-am] Error 2

Looks like there's some work to determine if the system has a
login_tty or not, my Linux box seems to have one located in libutil,
but -lutil is missing from the linker arguments. I patched the
Makefile.am to add it, however I'm pretty sure this not the right
way to do it portability-wise ;-). I looked on the GNU libc page and
found no mention of this function, it is not documented on my Linux
box, and just appears in utmp.h. I don't know if libutil is standard
or something, and the configure machinery to figure this out is far
beyond my knowledge right now, so I'll left that to the GNOME people
;-).

--LG

===================================================================
RCS file: /cvs/gnome/gnome-network/gnome-ppp/Makefile.am,v
retrieving revision 1.16
diff -u -r1.16 Makefile.am
--- Makefile.am	1999/02/17 09:46:22	1.16
+++ Makefile.am	1999/02/20 10:19:00
@@ -18,7 +18,7 @@
 	misc.c
 
 gnome_ppp_LDADD = $(GNOMEUI_LIBS) $(GNOME_LIBDIR) $(INTLLIBS) \
-	$(top_builddir)/gnome-ppp/libgnome_ppp/libgnome_ppp.a -lzvt
+	$(top_builddir)/gnome-ppp/libgnome_ppp/libgnome_ppp.a -lzvt -lutil
 
 Network_DATA = gnome-ppp.desktop