srchave moved to
supportdirectory is now in
src/include/compat.hboth for the list of renamed symbol names and for a way to get source backward compatibility in existing third-party module sources.
src/osdirectory. Currently this contains information for unix, OS/2 and Windows 32 platforms.
Configurationsyntax has been simplified for adding new modules. Users no longer need to enter the module's structure name. In addition, new modules can be located anywhere on the file system, or typically in new or existing directories under
Configure, such as additional libraries required.
configurereplaced the old top-level
make. In earlier version of Apache before 1.3, the line added to Configuration looked like this:
Module status_module mod_status.oFrom 1.3 onwards, the
AddModuleline should be used instead, and typically looks like this:
AddModule modules/standard/mod_status.oThe argument to AddModule is the path, relative to
src, to the module file's source or object file.
Normally when adding a module you should follow the instructions of the module author. However if the module comes as a single source file, say mod_foo.c, then the recommended way to add the module to Apache is as follows:
mod_foo.cinto the directory
srcdirectory and add the following line to
srcdirectory, and if the module required any additional compilation options (such as libraries) they would have to be added to
Configuration. Also the user would have to be told the module's structure name to add on the Module line of
From Apache 1.3 onwards, module authors can make use of these new features:
Configurationcommand AddModule which only requires a path to the module source or object file
apxssupport tool can be used to compile the module into a dynamic shared object (DSO), install it into the existing Apache installation and optionally activating it in the Apache
httpd.conffile. The only requirement is that Apache has DSO-support for the used platform and the module
mod_sowas built into the server binary
src/modulesdirectory of their Apache source tree. This will create a new directory
src/modules/mod_demo. Then they need to add the following line to the
AddModule modules/mod_demo/mod_demo.othen run
mod_demo/Makefile.tmpl should contain the
dependencies of the module source. For example, a simple module
which just interfaces to some standard Apache module API
functions might look this this:
mod_demo.o: mod_demo.c $(INCDIR)/httpd.h $(INCDIR)/http_protocol.hWhen the user runs
ConfigureApache will create a full makefile to build this module. If this module also requires some additional built-time options to be given, such as libraries, see the next section.
If the module also comes with header files, these can be
added to the archive. If the module consists of multiple source
files it can be built into a library file using a supplied
makefile. In this case, distribute the makefile as
mod_demo/Makefile and do not
Configure sees a
assumes it is safe to overwrite any existing
See the Apache
src/modules/standard for an
example of a module directory where the makefile is created
automatically from a Makefile.tmpl file (note that this
directory also shows how to distribute multiple modules in a
single directory). See
src/modules/example for examples of modules built
using custom makefiles (to build a library and an object file,
Configureto add compile-time options such as additional libraries. For example, if mod_demo in the example above also requires that Apache be linked against a DBM library, then the following text could be inserted into the mod_demo.c source:
/* * Module definition information - the part between the -START and -END * lines below is used by Configure. This could be stored in a separate * instead. * * MODULE-DEFINITION-START * Name: demo_module * ConfigStart LIBS="$LIBS $DBM_LIB" if [ "X$DBM_LIB" != "X" ]; then echo " + using $DBM_LIB for mod_demo" fi * ConfigEnd * MODULE-DEFINITION-END */Note that this is contained inside a C language comment to hide it from the compiler. Anything between the lines which contains
MODULE-DEFINITION-ENDis used by
Name:line gives the module's structure name. This is not really necessary in this case since if not present
Configurewill guess at a name based on the filename (e.g., given "mod_demo" it will remove the leading "mod_" and append "_module" to get a structure name. This works with all modules distributed with Apache).
The lines between
ConfigEnd as executed by
and can be used to add compile-time options and libraries. In
this case it adds the DBM library (from $DBM_LIB) to the
standard compilation libraries ($LIB) and displays a
See the default distribution's mod_auth_dbm.c for an example of an embedded module definition.
.moduleextension. So, for example, if the distributed module object file is mod_demo.o, the module definition file should be called mod_demo.module. It contains the same information as above, but does not need to be inside a C comment or delimited with
MODULE-DEFINITION-STARTetc. For example:
Name: demo_module ConfigStart LIBS="$LIBS $DBM_LIB" if [ "X$DBM_LIB" != "X" ]; then echo " + using $DBM_LIB for mod_demo" fi ConfigEndSee the default distribution's mod_auth_db.module for an example of a separate module definition file.