Re: Vote on New Build System

Hello, On Thu, 7 Mar 2002, Sascha Schumann wrote: > I'd like to get some input on the new build system. If there > are enough "yea" voices, I could merge it into 4.3.0.. go for it (or should I say "yea" :) Derick > The current patch against the CVS is here: > > http://schumann.cx/buildv5.patch > > This version adds support for the test target and PHP_DEFINE > which aims at enabling more fine-grained dependencies and > phasing out the 2000 lines php_config.h. This fine-grained > approach has been used by the BSD kernels and Linux for some > time and is simply necessary for larger systems. > > The system preserves quite a lot of disk space and improves > the speed of the PHP build. > > An overview of the system follows: > > > PHP Build System V5 Overview > > - supports Makefile.ins during transition phase > - not-really-portable Makefile includes have been eliminated > - supports seperate build directories without VPATH by using > explicit rules only > - does not waste disk-space/CPU-time for building temporary libraries > => especially noticeable on slower systems > - slow recursive make replaced with one global Makefile > - eases integration of proper dependencies > - adds PHP_DEFINE(what[, value]) which creates a single include-file > per what. This will allow more fine-grained dependencies. > - abandoning the "one library per directory" concept > - improved integration of the CLI > - several new targets > build-modules: builds and copies dynamic modules into modules/ > install-cli: installs the CLI only, so that the install-sapi > target does only what its name says > - finally abandoned automake (still requires aclocal at this time) > - changed some configure-time constructs to run at buildconf-time > - upgraded shtool to 1.5.4 > - removed $(moduledir) (use EXTENSION_DIR) > > The Reason For a New System > > It became more and more apparent that there is a severe need > for addressing the portability concerns and improving the chance > that your build is correct (how often have you been told to > "make clean"? When this is done, you won't need to anymore). > > > If You Build PHP on a Unix System > > > You, as a user of PHP, will notice no changes. Of course, the build > system will be faster, look better and work smarter. > > > > If You Are Developing PHP > > > > > Extension developers: > > Makefile.ins are abandoned. The files which are to be compiled > are specified in the config.m4 now using the following macro: > > PHP_NEW_EXTENSION(foo, foo.c bar.c baz.cpp, $ext_shared) > > E.g. this enables the extension foo which consists of three source-code > modules, two in C and one in C++. And dependending on the user's > wishes, the extension will even be built as a dynamic module. > > The full syntax: > > PHP_NEW_EXTENSION(extname, sources [, shared [,sapi_class[, extra-cflags]]]) > > Please have a look at acinclude.m4 for the gory details and meanings > of the other parameters. > > And that's basically it for the extension side. > > If you previously built sub-libraries for this module, add > the source-code files here as well. If you need to specify > separate include directories, do it this way: > > PHP_NEW_EXTENSION(foo, foo.c mylib/bar.c mylib/gregor.c,,,-I@ext_srcdir@/lib) > > E.g. this builds the three files which are located relative to the > extension source directory and compiles all three files with the > special include directive (@ext_srcdir@ is automatically replaced). > > Now, you need to tell the build system that you want to build files > in a directory called $ext_builddir/lib: > > PHP_ADD_BUILD_DIR($ext_builddir/lib) > > Make sure to call this after PHP_NEW_EXTENSION, because $ext_builddir > is only set by the latter. > > If you have a complex extension, you might to need add special > Make rules. You can do this by calling PHP_ADD_MAKEFILE_FRAGMENT > in your config.m4 after PHP_NEW_EXTENSION. > > This will read a file in the source-dir of your extension called > Makefile.frag. In this file, $(builddir) and $(srcdir) will be > replaced by the values which are correct for your extension > and which are again determined by the PHP_NEW_EXTENSION macro. > > Make sure to prefix *all* relative paths correctly with either > $(builddir) or $(subdir). Because the build system does not > change the working directory anymore, we must use either > absolute paths or relative ones to the top build-directory. > Correct prefixing ensures that. > > > SAPI developers: > > Instead of using PHP_SAPI=foo/PHP_BUILD_XYZ, you will need to type > > PHP_SELECT_SAPI(name, type, sources.c) > > I.e. specify the source-code files as above and also pass the > information regarding how PHP is supposed to be built (shared > module, program, etc). > > For example for APXS: > > PHP_SELECT_SAPI(apache, shared, sapi_apache.c mod_php4.c php_apache.c) > > > > General info > > The foundation for the new system is the flexible handling of > sources and their contexts. With the help of macros you > can define special flags for each source-file, where it is > located, in which target context it can work, etc. > > Have a look at the well documented macros > PHP_ADD_SOURCES(_X) in acinclude.m4. > > - Sascha Experience IRCG > http://schumann.cx/ > http://schumann.cx/ircg > > > > -- > PHP Development Mailing List <http://www.php.net/> > To unsubscribe, visit: http://www.php.net/unsub.php > ---------------------------------------------------------------------- PHP: Scripting the Web - derick@php.net All your branches are belong to me! SRM: Site Resource Manager - www.vl-srm.net -----------------------------------------------------------------------