autotools: drop autoconf <2.59 compatibility code (zz60-xc-ovr)

The minimum required autoconf is 2.59, since curl 7.76.0 (2021).

Follow-up to a59f04611629f0db9ad8e768b9def73b9b4d9423 #6748

Closes #19464

diff --git a/configure.ac b/configure.ac
index cc16f4120af5dec9fd8c8a4fc191fac29b50ba57..e493369b9db6adc8f4ea9c417fbb6654e614f2ed 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -29,7 +29,6 @@ dnl We don't know the version number "statically" so we use a dash here
 AC_INIT([curl], [-], [a suitable curl mailing list: https://curl.se/mail/])
 
 XC_OVR_ZZ50
-XC_OVR_ZZ60
 CURL_OVERRIDE_AUTOCONF
 
 dnl configure script copyright

diff --git a/m4/zz60-xc-ovr.m4 b/m4/zz60-xc-ovr.m4
deleted file mode 100644 (file)
index d1d3a2f..0000000
--- a/m4/zz60-xc-ovr.m4
+++ /dev/null
@@ -1,65 +0,0 @@
-#---------------------------------------------------------------------------
-#
-# zz60-xc-ovr.m4
-#
-# Copyright (C) Daniel Stenberg, <daniel@haxx.se>
-#
-# Permission to use, copy, modify, and distribute this software for any
-# purpose with or without fee is hereby granted, provided that the above
-# copyright notice and this permission notice appear in all copies.
-#
-# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-#
-# SPDX-License-Identifier: ISC
-#
-#---------------------------------------------------------------------------
-
-# serial 1
-
-
-dnl The funny name of this file is intentional in order to make it
-dnl sort alphabetically after any libtool, autoconf or automake
-dnl provided .m4 macro file that might get copied into this same
-dnl subdirectory. This allows that macro (re)definitions from this
-dnl file may override those provided in other files.
-
-
-dnl Override an autoconf provided macro
-dnl -------------------------------------------------
-dnl This macro overrides the one provided by autoconf
-dnl 2.58 or newer, and provides macro definition for
-dnl autoconf 2.57 or older which lack it. This allows
-dnl using libtool 2.2 or newer, which requires that
-dnl this macro is used in configure.ac, with autoconf
-dnl 2.57 or older.
-
-m4_ifdef([AC_CONFIG_MACRO_DIR],
-[dnl
-m4_undefine([AC_CONFIG_MACRO_DIR])dnl
-])
-m4_define([AC_CONFIG_MACRO_DIR],[])
-
-
-dnl XC_OVR_ZZ60
-dnl -------------------------------------------------
-dnl Placing a call to this macro in configure.ac will
-dnl make macros in this file visible to other macros
-dnl used for same configure script, overriding those
-dnl provided elsewhere.
-
-AC_DEFUN([XC_OVR_ZZ60],
-[dnl
-AC_BEFORE([$0],[LT_INIT])dnl
-AC_BEFORE([$0],[AM_INIT_AUTOMAKE])dnl
-AC_BEFORE([$0],[AC_LIBTOOL_WIN32_DLL])dnl
-AC_BEFORE([$0],[AC_PROG_LIBTOOL])dnl
-dnl
-AC_BEFORE([$0],[AC_CONFIG_MACRO_DIR])dnl
-AC_BEFORE([$0],[AC_CONFIG_MACRO_DIRS])dnl
-])