See the current Perl documentation for ExtUtils::MM_Unix.
Here is our local, out-dated (pre-5.6) version:
ExtUtils::MM_Unix - methods used by ExtUtils::MakeMaker
The methods provided by this package are designed to be used in conjunction
with ExtUtils::MakeMaker. When MakeMaker writes a Makefile, it creates one
or more objects that inherit their methods from a package
MM itself doesn't provide any methods, but it
ISA ExtUtils::MM_Unix class. The inheritance tree of
MM lets operating specific packages take the responsibility for all the methods provided by MM_Unix. We are trying to reduce the number of the necessary overrides by defining rather primitive operations within ExtUtils::MM_Unix.
If you are going to write a platform specific
MM package, please try to limit the necessary
overrides to primitive methods, and if it is not possible to do so, let's
work out how to achieve that gain.
If you are overriding any of these methods in your Makefile.PL (in the
MY class), please report that to the makemaker mailing list. We are trying to minimize the necessary method overrides and switch to data driven Makefile.PLs wherever possible. In the long run less methods will be overridable via the
The following description of methods is still under development. Please
refer to the code for not suitably documented sections and complain loudly
to the makemaker mailing list.
Not all of the methods below are overridable in a Makefile.PL. Overridable
methods are marked as (o). All methods are overridable by a platform
specific MM_*.pm file (See
MM_VMS) and MM_OS2).
No physical check on the filesystem, but a logical cleanup of a path. On
UNIX eliminated successive slashes and successive
Concatenate two or more directory names to form a complete path ending with a directory. But remove the trailing slash from the resulting string, because it doesn't look good, isn't necessary and confuses
OS2. Of course, if this is the root directory, don't cut off the trailing slash :-)
Concatenate one or more directory names and a filename to form a complete
path ending with a filename
Returns a string representing of the current directory. ``.'' on
Returns a string representing of the root directory. ``/'' on
Returns a string representing of the parent directory. ``..'' on
- c_o (o)
Defines the suffix rules to compile different flavors of
C files to object files.
- cflags (o)
Does very much the same as the cflags script in the perl distribution. It doesn't return the whole compiler command line, but initializes all of its parts. The const_cccmd method then actually returns the definition of the
CCCMD macro which uses these parts.
- clean (o)
Defines the clean target.
- const_cccmd (o)
Returns the full compiler call for
C programs and stores the definition in
- const_config (o)
Defines a couple of constants in the Makefile that are imported from
- const_loadlibs (o)
Liblist for details.
- constants (o)
Initializes lots of constants and
- depend (o)
Same as macro for the depend attribute.
- dir_target (o)
Takes an array of directories that need to exist and returns a Makefile entry for a .exists file in these directories. Returns nothing, if the entry has already been processed. We're helpless though, if the same directory comes as
$(FOO) _and_ as ``bar''. Both of them get an entry, that's why we use ``::''.
- dist (o)
Defines a lot of macros for distribution support.
- dist_basics (o)
Defines the targets distclean, distcheck, skipcheck, manifest.
- dist_ci (o)
Defines a check in target for
- dist_core (o)
Defeines the targets dist, tardist, zipdist, uutardist, shdist
- dist_dir (o)
Defines the scratch directory target that will hold the distribution before
tar-ing (or shar-ing).
- dist_test (o)
Defines a target that produces the distribution in the scratchdirectory,
and runs 'perl Makefile.PL; make ;make test' in that subdirectory.
- dlsyms (o)
VMS to define
DL_VARS and write the *.exp files.
- dynamic (o)
Defines the dynamic target.
- dynamic_bs (o)
Defines targets for bootstrap files.
- dynamic_lib (o)
Defines how to produce the *.so (or equivalent) files.
Deprecated method. Use libscan instead.
Called by init_others, and calls ext ExtUtils::Liblist. See
Liblist for details.
Takes as argument a path and returns true, if it is an absolute path.
Finds the executables
The methods here are called for each MakeMaker object in the order
specified by @ExtUtils::MakeMaker::MM_Sections.
Inserts the sharpbang or equivalent magic number to a script
- force (o)
Guess the name of this package by examining the working directory's name. MakeMaker calls this only if the developer has not supplied a
Returns true if
MYEXTLIB or similar objects exist within this object that need a compiler. Does not descend into subdirectories as
- install (o)
Defines the install target.
- installbin (o)
Defines targets to install
- libscan (o)
Takes a path to a file that is found by init_dirscan and returns false if we don't want to include this file in the library. Mainly used to exclude
SCCS directories from installation.
- linkext (o)
Defines the linkext target which in turn defines the
Takes as arguments a directory name and a regular expression. Returns all
entries in the directory that match the regular expression.
- macro (o)
Simple subroutine to insert the macros defined by the macro attribute into
- makeaperl (o)
Called by staticmake. Defines how to write the Makefile to produce a static
By default the Makefile produced includes all the static extensions in the
perl library. (Purified versions of library files, e.g.,
DynaLoader_pure_p1_c0_032.a are automatically ignored to avoid link
- makefile (o)
Defines how to rewrite the Makefile.
- manifypods (o)
Defines targets and routines to translate the pods into manpages and put them into the
Returns true, if the argument is likely to be a command.
method under development. Not yet used. Ask Ilya :-)
- needs_linking (o)
Does this module need linking? Looks into subdirectory objects (see also
misnamed method (will have to be changed). The MM_Unix method just returns
the argument without further processing.
VMS used to insure that colons marking targets are preceded by space - most Unix Makes don't need this, but it's necessary under
VMS to distinguish the target delimiter from a colon appearing as part of a filespec.
parse a file and return what you think is
$VERSION in this
file set to
parse a file and return what you think is the
- pasthru (o)
Defines the string that is passed to recursive make calls in
Takes no argument, returns the environment variable
PATH as an array.
Takes one argument, a file name, and returns the file name, if the argument
is likely to be a perl script. On MM_Unix this is true for any ordinary,
- perldepend (o)
Defines the dependency from all *.h files that come with the perl
Defines target that creates a
PPD (Perl Package Description) file for a binary
- perm_rw (o)
Returns the attribute
PERM_RW or the string
644. Used as the string that is passed to the chmod command to set the permissions for read/writeable files. MakeMaker chooses
644 because it has turned out in the past that relying on the umask provokes
hard-to-track bugreports. When the return value is used by the perl
function chmod, it is interpreted as an octal value.
- perm_rwx (o)
Returns the attribute
PERM_RWX or the string
755, i.e. the string that is passed to the chmod command to set the permissions for executable files. See also perl_rw.
Defines target that copies all files in the hash
PM to their destination and autosplits them. See Install_DESCRIPTION
- post_constants (o)
Returns an empty string per default. Dedicated to overrides from within
Makefile.PL after all constants have been defined.
- post_initialize (o)
Returns an empty string per default. Used in Makefile.PLs to add some chunk
of text to the Makefile after the object is initialized.
- postamble (o)
Returns an empty string. Can be used in Makefile.PLs to write some text to
the Makefile at the end.
Check a path variable in
$self from %Config, if it contains a
prefix, and replace it with another one.
Takes as arguments an attribute name, a search prefix and a replacement
prefix. Changes the attribute in the object.
- processPL (o)
Defines targets to run
- realclean (o)
Defines the realclean target.
Takes the name of a package, which may be a nested package, in the form
Foo/Bar and replaces the slash with
::. Returns the replacement.
- static (o)
Defines the static target.
- static_lib (o)
Defines how to produce the *.a (or equivalent) files.
- staticmake (o)
- subdir_x (o)
Helper subroutine for subdirs
- subdirs (o)
Defines targets to process subdirectories.
- test (o)
Defines the test targets.
- test_via_harness (o)
Helper method to write the test targets
- test_via_script (o)
Other helper method for test.
- tool_autosplit (o)
Defines a simple perl call that runs autosplit. May be deprecated by
- tools_other (o)
UMASK_NULL in the Makefile. Also defines the perl programs
- tool_xsubpp (o)
Determines typemaps, xsubpp version, prototype behaviour.
- top_targets (o)
Defines the targets all, subdirs, config, and
Obsolete, depecated method. Not used since Version 5.21.
- xs_c (o)
Defines the suffix rules to compile
XS files to
- xs_o (o)
Defines suffix rules to go from
XS to object files directly. This is only intended for
broken make implementations.
This is internal method that returns path to libperl.a equivalent to be linked to dynamic extensions.
UNIX does not have one but
OS2 and Win32 do.
This is internal method that returns name of a file that is passed to linker to define symbols to be exported.
UNIX does not have one but
OS2 and Win32 do.