Autotools: Check Apache version with apxs and HTTPD_VERSION variable (php#15476)

The apxs -q HTTPD_VERSION variable is available since Apache 2.4.17.
This change obsoletes the PHP_AP_EXTRACT_VERSION macro and checks the
version in the config.m4 file directly. Version is checked against the
dotted format instead of the version number.

Author: petk

UPGRADING.INTERNALS

@@ -189,6 +189,8 @@ PHP 8.4 INTERNALS UPGRADE NOTES
      symbol anymore and requires at least libxml2 2.9.4.
    - Autoconf macro PHP_SETUP_ICONV doesn't define the HAVE_ICONV symbol
      anymore.
+   - Autoconf macro PHP_AP_EXTRACT_VERSION is obsolete (use the
+     'apxs -q HTTPD_VERSION').
    - Autoconf macro PHP_OUTPUT is obsolete (use AC_CONFIG_FILES).
    - Autoconf macro PHP_PROG_SETUP now accepts an argument to set the minimum
      required PHP version during the build.

build/php.m4

@@ -2030,7 +2030,8 @@ dnl PHP_AP_EXTRACT_VERSION(/path/httpd)
 dnl
 dnl This macro is used to get a comparable version for Apache.
 dnl
-AC_DEFUN([PHP_AP_EXTRACT_VERSION],[
+AC_DEFUN([PHP_AP_EXTRACT_VERSION], [m4_warn([obsolete],
+  [The macro 'PHP_AP_EXTRACT_VERSION' is obsolete. Use 'apxs -q HTTPD_VERSION'])
 AS_IF([test -x "$1"], [
   ac_output=$($1 -v 2>&1 | grep version | $SED -e 's/Oracle-HTTP-//')
   ac_IFS=$IFS

sapi/apache2handler/config.m4

@@ -53,9 +53,19 @@ if test "$PHP_APXS2" != "no"; then
     AS_CASE([$flag], [-D*], [APACHE_CPPFLAGS="$APACHE_CPPFLAGS $flag"])
   done
 
-  dnl Check Apache version.
-  PHP_AP_EXTRACT_VERSION([$APXS_HTTPD])
-  AS_VERSION_COMPARE([$APACHE_VERSION], [2004000],
+  dnl Check Apache version. The HTTPD_VERSION was added in Apache 2.4.17.
+  dnl Earlier versions can use the Apache HTTP Server command-line utility.
+  APACHE_VERSION=$($APXS -q HTTPD_VERSION 2>/dev/null)
+  AS_VAR_IF([APACHE_VERSION],, [
+    ac_output=$($APXS_HTTPD -v 2>&1 | grep version | $SED -e 's/Oracle-HTTP-//')
+    ac_IFS=$IFS
+    IFS="- /.
+"
+    set $ac_output
+    IFS=$ac_IFS
+    APACHE_VERSION="$4.$5.$6"
+  ])
+  AS_VERSION_COMPARE([$APACHE_VERSION], [2.4.0],
     [AC_MSG_ERROR([Please note that Apache version >= 2.4 is required])])
 
   APXS_LIBEXECDIR='$(INSTALL_ROOT)'$($APXS -q LIBEXECDIR)