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PHP build system evolution

PHP 1 (1995)

First public release of PHP 1 - Personal Home Page Tools started with a single Makefile.

PHP tools Makefile 
#
# Makefile for the PHP Tools
#
# By Rasmus Lerdorf
#

#
# Here are the configurable options.
#
# For BSDi systems, use: -DFLOCK
# For SVR4 systems (Solaris - SunOS 5.4), use: -DLOCKF
# For SunOS systems use: -DFLOCK -DFILEH
# For AIX systems use: -DLOCKF -DLOCKFH
# For Linux use: -DLOCKF
# For BSD 4.3 use: -DFLOCK -DFILEH -DDIRECT
#
# If you want to disable the <!--!command--> feature add this: -DNOSYSTEM

OPTIONS = -DFLOCK

# Generic compiler options
#CFLAGS = -g -O2 -Wall -DDEBUG $(OPTIONS)
CFLAGS = -O2 $(OPTIONS)
CC = gcc
# If you don't have gcc, use these instead:
#CFLAGS = -g $(OPTIONS)
#CC = cc

TSOURCE = php/phpf.c php/phpl.c php/phplview.c php/phplmon.c php/common.c \
      php/error.c php/post.c php/wm.c php/common.h php/config.h \
      php/subvar.c php/html_common.h php/post.h php/version.h php/wm.h \
      php/Makefile php/README php/License

SOURCE = phpf.c phpl.c phplview.c phplmon.c common.c \
      error.c post.c wm.c common.h config.h \
      subvar.c html_common.h post.h version.h wm.h \
      Makefile README License

ALL: phpl.cgi phplmon.cgi phplview.cgi phpf.cgi

phpl.cgi: phpl.o wm.o common.o post.o subvar.o error.o
    $(CC) -o phpl.cgi phpl.o wm.o common.o post.o error.o subvar.o

phplmon.cgi: phplmon.o common.o
    $(CC) -o phplmon.cgi phplmon.o common.o

phplview.cgi: phplview.o common.o post.o error.o
    $(CC) -o phplview.cgi phplview.o common.o post.o error.o

phpf.cgi: phpf.o post.o error.o
    $(CC) -o phpf.cgi phpf.o post.o error.o common.o

php.tar: $(SOURCE)
    cd ..;tar -cf php/php.tar $(TSOURCE);cd php

error.o:    error.c html_common.h
phpl.o:     phpl.c config.h
phplmon.o:  phplmon.c config.h
phplview.o: phplview.c
wm.o:       wm.c
common.o:   common.c version.h common.h
post.o:     post.c html_common.h
phpf.o:     phpf.c html_common.h common.h
subvar.o:   subvar.c

PHP 2.0 (1998)

PHP quickly grew and a new version was created - PHP 2.0 (PHP/FI) with Autoconf 2.9 based configure script.

PHP 4.0 (2000)

In 1999, support for building external PHP extensions using a PEAR-based tool phpize was added to PHP which became available in 2000 in the PHP 4.0 release. Autoconf minimum required version was set to 2.13.

PHP 4.3 (2002)

Build system gets rewritten and modernized for the Autoconf versions available at the time. Dependency on Automake has been removed.

PHP 5.0 (2004)

In 2003, a new additional Windows dedicated build system for building PHP on Windows systems was developed and added to PHP 5.0 released in 2004. Freedesktop's pkg-config tool was optionally used in PHP Autotools-based *nix build system to find the OpenSSL dependency on the system.

2008

Idea to rewrite PHP build system in CMake first appeared during the Google Summer of Code in 2008 (wiki, php-cmake).

PHP 5.4 (2012)

Autoconf minimum required version was increased to 2.59.

PHP 7.2 (2015)

The configure.in was renamed to configure.ac according to Autoconf evolution. Autoconf minimum required version was increased to 2.64.

PHP 7.3 (2018)

Autoconf minimum required version was increased to 2.68.

PHP 7.4 (2019)

In 2018, support for Freedesktop's pkg-config M4 macros was added in the PHP repository to simplify finding system dependencies. In 2019, build system was heavily cleaned up and adjusted for Autoconf versions available at the time, including the removal of aclocal.m4 in favor of the php related M4 macros in php.m4.

2021

Idea to move CMake forward and additionally use Conan was started on the PHP internals mailing list.