Relax autoconf support from 2.60 to 2.59. This is the version available on Centos/RHEL/Oracle Linux 5.6

build/buildcheck.sh

@@ -28,18 +28,18 @@ if test -z "$PHP_AUTOCONF"; then
   PHP_AUTOCONF='autoconf'
 fi
 
-# autoconf 2.60 or newer
+# autoconf 2.59 or newer
 ac_version=`$PHP_AUTOCONF --version 2>/dev/null|head -n 1|sed -e 's/^[^0-9]*//' -e 's/[a-z]* *$//'`
 if test -z "$ac_version"; then
 echo "buildconf: autoconf not found."
-echo "           You need autoconf version 2.60 or newer installed"
+echo "           You need autoconf version 2.59 or newer installed"
 echo "           to build PHP from SVN."
 exit 1
 fi
 IFS=.; set $ac_version; IFS=' '
-if test "$1" = "2" -a "$2" -lt "60" || test "$1" -lt "2"; then
+if test "$1" = "2" -a "$2" -lt "59" || test "$1" -lt "2"; then
 echo "buildconf: autoconf version $ac_version found."
-echo "           You need autoconf version 2.60 or newer installed"
+echo "           You need autoconf version 2.59 or newer installed"
 echo "           to build PHP from SVN."
 exit 1
 else

configure.in

@@ -8,9 +8,9 @@ sinclude(Zend/acinclude.m4)
 dnl Basic autoconf + automake initialization, generation of config.nice.
 dnl -------------------------------------------------------------------------
 
-AC_PREREQ(2.60)
+AC_PREREQ(2.59)
 AC_INIT(README.SVN-RULES)
-AC_PRESERVE_HELP_ORDER
+ifdef([AC_PRESERVE_HELP_ORDER], [AC_PRESERVE_HELP_ORDER], [])
 
 PHP_CONFIG_NICE(config.nice)
 

scripts/phpize.m4

@@ -1,8 +1,8 @@
 dnl This file becomes configure.in for self-contained extensions.
 
-AC_PREREQ(2.60)
+AC_PREREQ(2.59)
 AC_INIT(config.m4)
-AC_PRESERVE_HELP_ORDER
+ifdef([AC_PRESERVE_HELP_ORDER], [AC_PRESERVE_HELP_ORDER], [])
 
 PHP_CONFIG_NICE(config.nice)