necessary, because we can change the value of INCLUDES globally in one
place (configure.in).
Also add two defines in thread-safe mode
(_REENTRANT and POSIX_PTHREAD_SEMANTICS)
with libtool components
* SAPI targets can enable thread-safe mode and define
shared/static/program build target
* all configure scripts use the same config.cache
* phplibdir is $(top_builddir)/modules to avoid
permission problems
* sapi/*/Makefile.inc are gone
* runpath handling cleaned up
* top-level Makefile.in obsoleted through Makefile.am
* --enable-versioning uses libtool's cleaner and more
portable -export-symbols feature
implementation now has its own directory under sapi/, just like
extensions have theirs under ext/. To make the final targets appear
in the main dir, the top-level Makefile includes sapi/NN/Makefile.inc
from the selected sapi backend. This is a plan Makefile stub without
any autoconf substitutions. Each SAPI backend also has its own
config.m4 like extensions (read at the end of diversion 2) and
config.h.stub files.
Each SAPI backend has to contain:
config.m4: just like for extensions, this file contains
autoconf/automake directives that end up in the configure script. The
only difference is that the sapi config.m4 files are read in diversion
(output block) 2 instead of 3. The sapi config.m4 files should set
two variables: PHP_SAPI (which sapi backend to choose) and SAPI_TARGET
(the name of the resulting library or program, previously BINNAME).
If they are not specified, they will default to "cgi" and "php",
respectively.
Makefile.inc: has to exist, has to define "INSTALL_IT" to the command
used to install the final target (or ":" for no operation). It also
has to define a plain Makefile rule (without autoconf substitutions)
to build $(SAPI_TARGET)
Makefile.am: just what you think. Make sure your target is called
"libphpsapi_NNN.a", where NNN is the value of PHP_SAPI.
Some testing and fixing probably remains. To make everything hang
together, I've done some ugly tricks that I can imagine causing some
problems. I've built and run the CGI version and built the Apache
DSO.
