From 009038a79545f5ee8135b7dac852895b73ce0134 Mon Sep 17 00:00:00 2001
From: Juan Gomez <gomez@openldap.org>
Date: Tue, 30 Mar 1999 04:25:52 +0000
Subject: [PATCH] MDBM detection feature.

---
 build/openldap.m4     | 45 +++++++++++++++++++++++++++++++++++++++++++
 configure.in          | 16 +++++++++++++++
 include/portable.h.in |  3 +++
 3 files changed, 64 insertions(+)

diff --git a/build/openldap.m4 b/build/openldap.m4
index f5a14dfcf1..16e2647c00 100644
--- a/build/openldap.m4
+++ b/build/openldap.m4
@@ -337,6 +337,51 @@ AC_DEFUN([OL_GDBM],
 ])dnl
 dnl
 dnl ====================================================================
+dnl Check if MDBM library exists
+dnl Check for mdbm_open in standard libraries or -lmdbm
+dnl
+dnl defines ol_cv_lib_mdbm to 'yes' or '-lmdbm' or 'no'
+dnl		'yes' implies mdbm_open is in $LIBS
+dnl
+dnl uses:
+dnl		AC_CHECK_FUNC(mdbm_set_chain)
+dnl		AC_CHECK_LIB(mdbm,mdbm_set_chain)
+dnl
+AC_DEFUN([OL_LIB_MDBM],
+[AC_CACHE_CHECK(for MDBM library, [ol_cv_lib_mdbm],
+[	ol_LIBS="$LIBS"
+	AC_CHECK_FUNC(mdbm_set_chain,[ol_cv_lib_mdbm=yes], [
+		AC_CHECK_LIB(mdbm,mdbm_set_chain,[ol_cv_lib_mdbm=-lmdbm],[ol_cv_lib_mdbm=no])
+	])
+	LIBS="$ol_LIBS"
+])
+])dnl
+dnl
+dnl --------------------------------------------------------------------
+dnl Check if MDBM exists
+dnl
+dnl defines ol_cv_mdbm to 'yes' or 'no'
+dnl 
+dnl uses:
+dnl		OL_LIB_MDBM
+dnl		AC_CHECK_HEADERS(mdbm.h)
+dnl
+AC_DEFUN([OL_MDBM],
+[AC_REQUIRE([OL_LIB_MDBM])
+ AC_CHECK_HEADERS(mdbm.h)
+ AC_CACHE_CHECK(for db, [ol_cv_mdbm], [
+	if test $ol_cv_lib_mdbm = no -o $ac_cv_header_mdbm_h = no ; then
+		ol_cv_mdbm=no
+	else
+		ol_cv_mdbm=yes
+	fi
+])
+ if test $ol_cv_mdbm = yes ; then
+	AC_DEFINE(HAVE_MDBM,1, [define if MDBM is available])
+ fi
+])dnl
+dnl
+dnl ====================================================================
 dnl Check if NDBM library exists
 dnl Check for dbm_open in standard libraries or -lndbm or -ldbm
 dnl
diff --git a/configure.in b/configure.in
index 61dc27746e..3b2b2e7f08 100644
--- a/configure.in
+++ b/configure.in
@@ -220,6 +220,10 @@ else
 		$ol_with_ldbm_type = btree ; then
 		AC_MSG_ERROR([GDBM only supports LDBM type hash])
 	fi
+	if test $ol_with_ldbm_api = mdbm -a \
+		$ol_with_ldbm_type = btree ; then
+		AC_MSG_ERROR([MDBM only supports LDBM type hash])
+	fi
 	if test $ol_with_ldbm_api = ndbm -a \
 		$ol_with_ldbm_type = btree ; then
 		AC_MSG_ERROR([NDBM only supports LDBM type hash])
@@ -1397,6 +1401,18 @@ if test $ol_link_ldbm = no -a $ol_with_ldbm_type = btree ; then
 	ol_with_ldbm_api=none
 fi
 
+if test $ol_with_ldbm_api = auto -o $ol_with_ldbm_api = mdbm ; then
+	OL_MDBM
+
+	if test $ol_cv_mdbm = yes ; then
+		ol_link_ldbm=mdbm
+		ol_with_ldbm_api=mdbm
+		if test $ol_cv_lib_mdbm != yes ; then
+			LDBM_LIBS="$LDBM_LIBS $ol_cv_lib_mdbm"
+		fi
+	fi
+fi
+
 if test $ol_with_ldbm_api = auto -o $ol_with_ldbm_api = gdbm ; then
 	OL_GDBM
 
diff --git a/include/portable.h.in b/include/portable.h.in
index 8ea0c646e1..3ac216399c 100644
--- a/include/portable.h.in
+++ b/include/portable.h.in
@@ -636,6 +636,9 @@
 /* define if GNU DBM is available */
 #undef HAVE_GDBM
 
+/* define if MDBM is available */
+#undef HAVE_MDBM
+
 /* define if NDBM is available */
 #undef HAVE_NDBM
 
-- 
2.39.5