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, 0 insertions, 4 deletions

diff --git a/.gitignore b/.gitignore
index 52ab256ba3..d0aa3b394a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,9 +38,6 @@
 # Standard object files generated during build process
 *.o
 
-# Generated by `./buildconf` or `phpize`
-aclocal.m4
-
 # Cache directories generated by Autoconf tools - autoconf, autoreconf...
 autom4te.cache/
 
@@ -174,7 +171,6 @@ php
 # ------------------------------------------------------------------------------
 # Extensions files additionally generated by `cd ext/name && phpize && ./configure`
 # ------------------------------------------------------------------------------
-/ext/*/acinclude.m4
 /ext/*/build/
 /ext/*/configure.ac
 /ext/*/run-tests.php