BuildSystem: Avoid obsolete warning with libcurl.m4 on autoconf.

Updated the macro-set autoconf/libcurl.m4 to its latest upstream version. This
avoids a warning about an obsolete macro on AC_HELP_STRING, because Asterisk is
using AS_HELP_STRING everywhere else already.

ASTERISK-26046

Change-Id: I8299faf504ceaeee3e39930c59293809e116c631

autoconf/libcurl.m4

+#***************************************************************************
+#                                  _   _ ____  _
+#  Project                     ___| | | |  _ \| |
+#                             / __| | | | |_) | |
+#                            | (__| |_| |  _ <| |___
+#                             \___|\___/|_| \_\_____|
+#
+# Copyright (C) 2006, David Shaw <dshaw@jabberwocky.com>
+#
+# This software is licensed as described in the file COPYING, which
+# you should have received as part of this distribution. The terms
+# are also available at https://curl.haxx.se/docs/copyright.html.
+#
+# You may opt to use, copy, modify, merge, publish, distribute and/or sell
+# copies of the Software, and permit persons to whom the Software is
+# furnished to do so, under the terms of the COPYING file.
+#
+# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+# KIND, either express or implied.
+#
+###########################################################################
 # LIBCURL_CHECK_CONFIG ([DEFAULT-ACTION], [MINIMUM-VERSION],
 #                       [ACTION-IF-YES], [ACTION-IF-NO])
 # ----------------------------------------------------------
@@ -55,10 +76,14 @@ AC_DEFUN([AST_LIBCURL_CHECK_CONFIG],
   AH_TEMPLATE([LIBCURL_PROTOCOL_LDAP],[Defined if libcurl supports LDAP])
   AH_TEMPLATE([LIBCURL_PROTOCOL_DICT],[Defined if libcurl supports DICT])
   AH_TEMPLATE([LIBCURL_PROTOCOL_TFTP],[Defined if libcurl supports TFTP])
+  AH_TEMPLATE([LIBCURL_PROTOCOL_RTSP],[Defined if libcurl supports RTSP])
+  AH_TEMPLATE([LIBCURL_PROTOCOL_POP3],[Defined if libcurl supports POP3])
+  AH_TEMPLATE([LIBCURL_PROTOCOL_IMAP],[Defined if libcurl supports IMAP])
+  AH_TEMPLATE([LIBCURL_PROTOCOL_SMTP],[Defined if libcurl supports SMTP])
   AC_SUBST(PBX_CURL)
 
   AC_ARG_WITH(libcurl,
-     AC_HELP_STRING([--with-libcurl=DIR],[look for the curl library in DIR]),
+     AS_HELP_STRING([--with-libcurl=PREFIX],[look for the curl library in PREFIX/lib and headers in PREFIX/include]),
      [_libcurl_with=$withval],[_libcurl_with=ifelse([$1],,[yes],[$1])])
 
   if test "$_libcurl_with" != "no" ; then
@@ -72,10 +97,10 @@ AC_DEFUN([AST_LIBCURL_CHECK_CONFIG],
      if test -d "$_libcurl_with" ; then
         CURL_INCLUDE="-I$withval/include"
         _libcurl_ldflags="-L$withval/lib"
-        AC_PATH_PROG([_libcurl_config],[curl-config],["$withval/bin"],
+        AC_PATH_PROG([_libcurl_config],[curl-config],[],
                      ["$withval/bin"])
      else
-        AC_PATH_PROG([_libcurl_config],[curl-config])
+        AC_PATH_PROG([_libcurl_config],[curl-config],[],[$PATH])
      fi
 
      if test x$_libcurl_config != "x" ; then
@@ -143,18 +168,19 @@ AC_DEFUN([AST_LIBCURL_CHECK_CONFIG],
            _libcurl_save_libs=$LIBS
            LIBS="$CURL_LIB $LIBS"
 
-           AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <curl/curl.h>],[
+           AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <curl/curl.h>]],[[
 /* Try and use a few common options to force a failure if we are
    missing symbols or can't link. */
 int x;
 curl_easy_setopt(NULL,CURLOPT_URL,NULL);
 x=CURL_ERROR_SIZE;
 x=CURLOPT_WRITEFUNCTION;
-x=CURLOPT_FILE;
+x=CURLOPT_WRITEDATA;
 x=CURLOPT_ERRORBUFFER;
 x=CURLOPT_STDERR;
 x=CURLOPT_VERBOSE;
-])],libcurl_cv_lib_curl_usable=yes,libcurl_cv_lib_curl_usable=no)
+if (x) {;}
+]])],libcurl_cv_lib_curl_usable=yes,libcurl_cv_lib_curl_usable=no)
 
            CPPFLAGS=$_libcurl_save_cppflags
            LIBS=$_libcurl_save_libs
@@ -196,17 +222,23 @@ x=CURLOPT_VERBOSE;
 
               # We don't have --protocols, so just assume that all
               # protocols are available
-              _libcurl_protocols="HTTP FTP FILE TELNET LDAP DICT"
+              _libcurl_protocols="HTTP FTP FILE TELNET LDAP DICT TFTP"
 
               if test x$libcurl_feature_SSL = xyes ; then
                  _libcurl_protocols="$_libcurl_protocols HTTPS"
 
                  # FTPS wasn't standards-compliant until version
-                 # 7.11.0
+                 # 7.11.0 (0x070b00 == 461568)
                  if test $_libcurl_version -ge 461568; then
                     _libcurl_protocols="$_libcurl_protocols FTPS"
                  fi
               fi
+
+              # RTSP, IMAP, POP3 and SMTP were added in
+              # 7.20.0 (0x071400 == 463872)
+              if test $_libcurl_version -ge 463872; then
+                 _libcurl_protocols="$_libcurl_protocols RTSP IMAP POP3 SMTP"
+              fi
            fi
 
            for _libcurl_protocol in $_libcurl_protocols ; do
@@ -241,4 +273,3 @@ x=CURLOPT_VERBOSE;
 
   unset _libcurl_with
 ])dnl
-

configure

@@ -2095,7 +2095,8 @@ Optional Packages:
   --with-uriparser=PATH   use uriparser library files in PATH
   --with-kqueue=PATH      use kqueue support files in PATH
   --with-ldap=PATH        use OpenLDAP files in PATH
-  --with-libcurl=DIR      look for the curl library in DIR
+  --with-libcurl=PREFIX   look for the curl library in PREFIX/lib and headers
+                          in PREFIX/include
   --with-libedit=PATH     use NetBSD Editline library files in PATH, use
                           'internal' Editline otherwise
   --with-libxml2=PATH     use LibXML2 files in PATH
@@ -9459,6 +9460,10 @@ fi
+
+
+
+
@@ -9551,7 +9556,6 @@ done
   done
 IFS=$as_save_IFS
-  test -z "$ac_cv_path__libcurl_config" && ac_cv_path__libcurl_config=""$withval/bin""
   ;;
 esac
 fi
@@ -9701,10 +9705,11 @@ int x;
 curl_easy_setopt(NULL,CURLOPT_URL,NULL);
 x=CURL_ERROR_SIZE;
 x=CURLOPT_WRITEFUNCTION;
-x=CURLOPT_FILE;
+x=CURLOPT_WRITEDATA;
 x=CURLOPT_ERRORBUFFER;
 x=CURLOPT_STDERR;
 x=CURLOPT_VERBOSE;
+if (x) {;}
   ;
   return 0;
@@ -9771,17 +9776,23 @@ _ACEOF
               # We don't have --protocols, so just assume that all
               # protocols are available
-              _libcurl_protocols="HTTP FTP FILE TELNET LDAP DICT"
+              _libcurl_protocols="HTTP FTP FILE TELNET LDAP DICT TFTP"
               if test x$libcurl_feature_SSL = xyes ; then
                  _libcurl_protocols="$_libcurl_protocols HTTPS"
                  # FTPS wasn't standards-compliant until version
-                 # 7.11.0
+                 # 7.11.0 (0x070b00 == 461568)
                  if test $_libcurl_version -ge 461568; then
                     _libcurl_protocols="$_libcurl_protocols FTPS"
                  fi
               fi
+
+              # RTSP, IMAP, POP3 and SMTP were added in
+              # 7.20.0 (0x071400 == 463872)
+              if test $_libcurl_version -ge 463872; then
+                 _libcurl_protocols="$_libcurl_protocols RTSP IMAP POP3 SMTP"
+              fi
            fi
            for _libcurl_protocol in $_libcurl_protocols ; do

include/asterisk/autoconfig.h.in

@@ -1216,9 +1216,21 @@
 /* Defined if libcurl supports HTTPS */
 #undef LIBCURL_PROTOCOL_HTTPS
 
+/* Defined if libcurl supports IMAP */
+#undef LIBCURL_PROTOCOL_IMAP
+
 /* Defined if libcurl supports LDAP */
 #undef LIBCURL_PROTOCOL_LDAP
 
+/* Defined if libcurl supports POP3 */
+#undef LIBCURL_PROTOCOL_POP3
+
+/* Defined if libcurl supports RTSP */
+#undef LIBCURL_PROTOCOL_RTSP
+
+/* Defined if libcurl supports SMTP */
+#undef LIBCURL_PROTOCOL_SMTP
+
 /* Defined if libcurl supports TELNET */
 #undef LIBCURL_PROTOCOL_TELNET