find database library

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@5019 ec53bebd-3082-4978-b11e-865c3cabbd6b

cf/krb-find-db.m4

@@ -0,0 +1,85 @@
+dnl $Id$
+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 $LIBS"
+	AC_TRY_RUN([
+#include <unistd.h>
+#include <fcntl.h>
+#include <ndbm.h>
+int main()
+{
+  DBM *d;
+
+  d = dbm_open("conftest", O_RDWR | O_CREAT, 0666);
+  if(d == NULL)
+    return 1;
+  dbm_close(d);
+  return 0;
+}], [
+	if test -f conftest.db; then
+		ac_res=db
+	else
+		ac_res=dbm
+	fi], ac_res=no, ac_res=no)
+
+	LIBS="$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)
+if test "$lib_db" != no; then
+	LIB_DBM="$lib_db"
+	AC_DEFINE(NDBM)dnl
+	AC_DEFINE(HAVE_NEW_DB)
+	if test "$LIB_DBM"; then
+		ac_res="yes, $LIB_DBM"
+	else
+		ac_res=yes
+	fi
+elif test "$lib_dbm" != no; then
+	LIB_DBM="$lib_dbm"
+	AC_DEFINE(NDBM)dnl
+	if test "$LIB_DBM"; then
+		ac_res="yes, $LIB_DBM"
+	else
+		ac_res=yes
+	fi
+else
+	LIB_DBM=""
+	ac_res=no
+fi
+AC_SUBST(LIB_DBM)
+AC_MSG_RESULT($ac_res)
+
+])