From dae382a1a1481a94b708c82d5aa9fa7253084160 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Wed, 12 May 2021 11:15:51 +0200
Subject: [PATCH] configure: if asked for, fail if ldap is not found

Reported-by: Jakub Zakrzewski
Fixes #7053
Closes #7055
---
 configure.ac | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/configure.ac b/configure.ac
index 8b3ff904c..5c697618b 100755
--- a/configure.ac
+++ b/configure.ac
@@ -552,6 +552,10 @@ AS_HELP_STRING([--disable-ldap],[Disable LDAP support]),
        AC_DEFINE(CURL_DISABLE_LDAP, 1, [to disable LDAP])
        AC_SUBST(CURL_DISABLE_LDAP, [1])
        ;;
+  yes)
+       ldap_askedfor="yes"
+       AC_MSG_RESULT(yes)
+       ;;
   *)
        AC_MSG_RESULT(yes)
        ;;
@@ -1356,6 +1360,9 @@ if test x$CURL_DISABLE_LDAP != x1 ; then
 
   if test "$LDAPLIBNAME" ; then
     AC_CHECK_LIB("$LDAPLIBNAME", ldap_init,, [
+      if test -n "$ldap_askedfor"; then
+        AC_MSG_ERROR([couldn't detect the LDAP libraries])
+      fi
       AC_MSG_WARN(["$LDAPLIBNAME" is not an LDAP library: LDAP disabled])
       AC_DEFINE(CURL_DISABLE_LDAP, 1, [to disable LDAP])
       AC_SUBST(CURL_DISABLE_LDAP, [1])
@@ -1366,6 +1373,9 @@ if test x$CURL_DISABLE_LDAP != x1 ; then
     CURL_CHECK_LIBS_LDAP
     case X-"$curl_cv_ldap_LIBS" in
       X-unknown)
+        if test -n "$ldap_askedfor"; then
+          AC_MSG_ERROR([couldn't detect the LDAP libraries])
+        fi
         AC_MSG_WARN([Cannot find libraries for LDAP support: LDAP disabled])
         AC_DEFINE(CURL_DISABLE_LDAP, 1, [to disable LDAP])
         AC_SUBST(CURL_DISABLE_LDAP, [1])