dbm/glibc confusion

[Greg Stark <gsstark@mit.edu>]

There seem to be several packages that provide dbm/ndbm/gdbm/db1/db2 etc
libraries, and confusion about which provides which and where to search for
which.

Kerberos4kth can use any of these and attempts to find the right one in
configure automatically. On my system it works fine but on someone else's it
doesn't find dbm despite having it installed.

The questions are:

Which dbm library is preferred on Debian. In particular which version is
provided by glibc and where should it be found? 

Where do other packages install dbm libraries? I wonder which might be
confusing the krb4 autoconf macro. I've attached the macro in case anyone's
curious to help with this. 

dnl $Id: krb-find-db.m4,v 1.5 1999/05/08 02:24:04 assar Exp $
dnl
dnl find a suitable database library
dnl
dnl AC_FIND_DB(libraries)
AC_DEFUN(KRB_FIND_DB, [

lib_dbm=no
lib_db=no

for i in $1; do

	if test "$i"; then
		m="lib$i"
		l="-l$i"
	else
		m="libc"
		l=""
	fi	

	AC_MSG_CHECKING(for dbm_open in $m)
	AC_CACHE_VAL(ac_cv_krb_dbm_open_$m, [

	save_LIBS="$LIBS"
	LIBS="$l $LIBS"
	AC_TRY_RUN([
#include <unistd.h>
#include <fcntl.h>
#if defined(HAVE_NDBM_H)
#include <ndbm.h>
#elif defined(HAVE_DBM_H)
#include <dbm.h>
#elif defined(HAVE_RPCSVC_DBM_H)
#include <rpcsvc/dbm.h>
#elif defined(HAVE_DB_H)
#define DB_DBM_HSEARCH 1
#include <db.h>
#endif
int main()
{
  DBM *d;

  d = dbm_open("conftest", O_RDWR | O_CREAT, 0666);
  if(d == NULL)
    return 1;
  dbm_close(d);
  return 0;
}], [
	if test -f conftest.db; then
		ac_res=db
	else
		ac_res=dbm
	fi], ac_res=no, ac_res=no)

	LIBS="$save_LIBS"

	eval ac_cv_krb_dbm_open_$m=$ac_res])
	eval ac_res=\$ac_cv_krb_dbm_open_$m
	AC_MSG_RESULT($ac_res)

	if test "$lib_dbm" = no -a $ac_res = dbm; then
		lib_dbm="$l"
	elif test "$lib_db" = no -a $ac_res = db; then
		lib_db="$l"
		break
	fi
done

AC_MSG_CHECKING(for NDBM library)
ac_ndbm=no
if test "$lib_db" != no; then
	LIB_DBM="$lib_db"
	ac_ndbm=yes
	AC_DEFINE(HAVE_NEW_DB, 1, [Define if NDBM really is DB (creates files ending in .db).])
	if test "$LIB_DBM"; then
		ac_res="yes, $LIB_DBM"
	else
		ac_res=yes
	fi
elif test "$lib_dbm" != no; then
	LIB_DBM="$lib_dbm"
	ac_ndbm=yes
	if test "$LIB_DBM"; then
		ac_res="yes, $LIB_DBM"
	else
		ac_res=yes
	fi
else
	LIB_DBM=""
	ac_res=no
fi
test "$ac_ndbm" = yes && AC_DEFINE(NDBM, 1, [Define if you have NDBM (and not DBM)])dnl
AC_SUBST(LIB_DBM)
DBLIB="$LIB_DBM"
AC_SUBST(DBLIB)
AC_MSG_RESULT($ac_res)

])

-- 
greg