Move acinclude.m4 to build/php.m4

The acinclude.m4 file is in a usual Autotools build processed with
Automake's aclocal tool. Since PHP currently doesn't use Automake and
aclocal this file can be moved into the build directory. PHP build
system currently generates a combined aclocal.m4 file that Autoconf
can processes automatically.

However, a newer practice is writing all local macros in separate
dedicated files prefixed with package name, in PHP's case PHP_MACRO_NAME
and putting them in a common `m4` directory. PHP uses currently `build`
directory for this purpose.

Name `php.m4` probably most resembles such file for PHP's case.

PHP manually created the aclocal.m4 file from acinclude.m4 and
build/libtool.m4. Which is also not a particularly good practice [1], so
this patch also removes the generated alocal.m4 usage and uses
m4_include() calls manually in the configure.ac and phpize.m4 files
manually.

- sort order is not important but can be alphabetical
- list of *.m4 files prerequisites for configure script generation
  updated
- Moving m4_include() before AC_INIT also removes all comments starting
  with hash character (`#`) in the included files.

[1] https://autotools.io/autoconf/macros.html

1 files changed, 7 insertions, 7 deletions

diff --git a/buildconf b/buildconf
index 6e644df4b8..4c0fe37a7e 100755
--- a/buildconf
+++ b/buildconf
@@ -27,12 +27,12 @@ while test $# -gt 0; do
 PHP buildconf
 
 A wrapper around the autoconf and autoheader that generate files for building
-PHP on *nix systems (configure, main/php_config.h.in, aclocal.m4...). The
-configure script is used to customize the PHP build based on the provided
-options and system. PHP releases downloaded from PHP.net already include the
-configure script so installing Autoconf and running buildconf is not needed. For
-the PHP sources from the Git repository, buildconf is used for generating a new
-configure script and required files.
+PHP on *nix systems (configure and main/php_config.h.in). The configure script
+is used to customize the PHP build based on the provided options and system. PHP
+releases downloaded from PHP.net already include the configure script so
+installing Autoconf and running buildconf is not needed. For the PHP sources
+from the Git repository, buildconf is used for generating a new configure script
+and required files.
 
 SYNOPSIS:
   buildconf [<options>]
@@ -103,4 +103,4 @@ $MAKE -s -f build/build.mk \
   PHP_AUTOCONF="$PHP_AUTOCONF" \
   PHP_AUTOHEADER="$PHP_AUTOHEADER" \
   PHP_AUTOCONF_FLAGS="$autoconf_flags" \
-  PHP_M4_FILES="$(echo TSRM/*.m4 Zend/Zend.m4 ext/*/config*.m4 sapi/*/config*.m4)"
+  PHP_M4_FILES="$(echo TSRM/*.m4 Zend/Zend.m4 build/*.m4 ext/*/config*.m4 sapi/*/config*.m4)"