ExtUtils::MM_Any - Platform-agnostic MM methods
FOR INTERNAL USE ONLY!
package ExtUtils::MM_SomeOS;
# Temporarily, you have to subclass both. Put MM_Any first.
require ExtUtils::MM_Any;
require ExtUtils::MM_Unix;
@ISA = qw(ExtUtils::MM_Any ExtUtils::Unix);FOR INTERNAL USE ONLY!
ExtUtils::MM_Any is a superclass for the ExtUtils::MM_* set of modules. It contains methods which are either inherently cross-platform or are written in a cross-platform manner.
Subclass off of ExtUtils::MM_Any and ExtUtils::MM_Unix. This is a temporary solution.
THIS MAY BE TEMPORARY!
Any methods marked Abstract must be implemented by subclasses.
These are methods which help writing cross-platform code.
my @os_flavor = $mm->os_flavor;@os_flavor is the style of operating system this is, usually corresponding to the MM_*.pm file we're using.
The first element of @os_flavor is the major family (ie. Unix, Windows, VMS, OS/2, etc...) and the rest are sub families.
Some examples:
Cygwin98 ('Unix', 'Cygwin', 'Cygwin9x')
Windows ('Win32')
Win98 ('Win32', 'Win9x')
Linux ('Unix', 'Linux')
MacOS X ('Unix', 'Darwin', 'MacOS', 'MacOS X')
OS/2 ('OS/2')This is used to write code for styles of operating system. See os_flavor_is() for use.
my $is_this_flavor = $mm->os_flavor_is($this_flavor);
my $is_this_flavor = $mm->os_flavor_is(@one_of_these_flavors);Checks to see if the current operating system is one of the given flavors.
This is useful for code like:
if( $mm->os_flavor_is('Unix') ) {
$out = `foo 2>&1`;
}
else {
$out = `foo`;
}my $can_load_xs = $self->can_load_xs;Returns true if we have the ability to load XS.
This is important because miniperl, used to build XS modules in the core, can not load XS.
my @cmds = $MM->split_command($cmd, @args);Most OS have a maximum command length they can execute at once. Large modules can easily generate commands well past that limit. Its necessary to split long commands up into a series of shorter commands.
split_command will return a series of @cmds each processing part of the args. Collectively they will process all the arguments. Each individual line in @cmds will not be longer than the $self->max_exec_len being careful to take into account macro expansion.
$cmd should include any switches and repeated initial arguments.
If no @args are given, no @cmds will be returned.
Pairs of arguments will always be preserved in a single command, this is a heuristic for things like pm_to_blib and pod2man which work on pairs of arguments. This makes things like this safe:
$self->split_command($cmd, %pod2man);my @commands = $MM->echo($text);
my @commands = $MM->echo($text, $file);
my @commands = $MM->echo($text, $file, $appending);Generates a set of @commands which print the $text to a $file.
If $file is not given, output goes to STDOUT.
If $appending is true the $file will be appended to rather than overwritten.
my $args = $mm->wraplist(@list);Takes an array of items and turns them into a well-formatted list of arguments. In most cases this is simply something like:
FOO \
BAR \
BAZmy $filter_make_text = $mm->maketext_filter($make_text);The text of the Makefile is run through this method before writing to disk. It allows systems a chance to make portability fixes to the Makefile.
By default it does nothing.
This method is protected and not intended to be called outside of MakeMaker.
my $subdir_cmd = $MM->cd($subdir, @cmds);This will generate a make fragment which runs the @cmds in the given $dir. The rough equivalent to this, except cross platform.
cd $subdir && $cmdCurrently $dir can only go down one level. "foo" is fine. "foo/bar" is not. "../foo" is right out.
The resulting $subdir_cmd has no leading tab nor trailing newline. This makes it easier to embed in a make string. For example.
my $make = sprintf <<'CODE', $subdir_cmd;
foo :
$(ECHO) what
%s
$(ECHO) mouche
CODEmy $oneliner = $MM->oneliner($perl_code);
my $oneliner = $MM->oneliner($perl_code, \@switches);This will generate a perl one-liner safe for the particular platform you're on based on the given $perl_code and @switches (a -e is assumed) suitable for using in a make target. It will use the proper shell quoting and escapes.
$(PERLRUN) will be used as perl.
Any newlines in $perl_code will be escaped. Leading and trailing newlines will be stripped. Makes this idiom much easier:
my $code = $MM->oneliner(<<'CODE', [...switches...]);
some code here
another line here
CODEUsage might be something like:
# an echo emulation
$oneliner = $MM->oneliner('print "Foo\n"');
$make = '$oneliner > somefile';All dollar signs must be doubled in the $perl_code if you expect them to be interpreted normally, otherwise it will be considered a make macro. Also remember to quote make macros else it might be used as a bareword. For example:
# Assign the value of the $(VERSION_FROM) make macro to $vf.
$oneliner = $MM->oneliner('$$vf = "$(VERSION_FROM)"');Its currently very simple and may be expanded sometime in the figure to include more flexible code and switches.
my $safe_text = $MM->quote_literal($text);This will quote $text so it is interpreted literally in the shell.
For example, on Unix this would escape any single-quotes in $text and put single-quotes around the whole thing.
my $escaped_text = $MM->escape_newlines($text);Shell escapes newlines in $text.
my $max_exec_len = $MM->max_exec_len;Calculates the maximum command size the OS can exec. Effectively, this is the max size of a shell command line.
my $make = $MM->make;Returns the make variant we're generating the Makefile for. This attempts to do some normalization on the information from %Config or the user.
These are methods which produce make targets.
Generate the default target 'all'.
my $make_frag = $mm->blibdirs_target;Creates the blibdirs target which creates all the directories we use in blib/.
The blibdirs.ts target is deprecated. Depend on blibdirs instead.
Defines the clean target.
my $make_frag = $MM->clean_subdirs_target;Returns the clean_subdirs target. This is used by the clean target to call clean on any subdirectories which contain Makefiles.
my $make_frag = $mm->dir_target(@directories);Generates targets to create the specified directories and set its permission to PERM_DIR.
Because depending on a directory to just ensure it exists doesn't work too well (the modified time changes too often) dir_target() creates a .exists file in the created directory. It is this you should depend on. For portability purposes you should use the $(DIRFILESEP) macro rather than a '/' to seperate the directory from the file.
yourdirectory$(DIRFILESEP).existsDefines the scratch directory target that will hold the distribution before tar-ing (or shar-ing).
Defines a target that produces the distribution in the scratchdirectory, and runs 'perl Makefile.PL; make ;make test' in that subdirectory.
Defines the dynamic target.
my $make_frag = $mm->makemakerdflt_targetReturns a make fragment with the makemakerdeflt_target specified. This target is the first target in the Makefile, is the default target and simply points off to 'all' just in case any make variant gets confused or something gets snuck in before the real 'all' target.
my $manifypods_target = $self->manifypods_target;Generates the manifypods target. This target generates man pages from all POD files in MAN1PODS and MAN3PODS.
my $target = $mm->metafile_target;Generate the metafile target.
Writes the file META.yml YAML encoded meta-data about the module in the distdir. The format follows Module::Build's as closely as possible.
my @metadata_pairs = $mm->metafile_data(\%meta_add, \%meta_merge);Returns the data which MakeMaker turns into the META.yml file.
Values of %meta_add will overwrite any existing metadata in those keys. %meta_merge will be merged with them.
my $meta_yml = $mm->metafile_file(@metadata_pairs);Turns the @metadata_pairs into YAML.
This method does not implement a complete YAML dumper, being limited to dump a hash with values which are strings, undef's or nested hashes and arrays of strings. No quoting/escaping is done.
my $make_frag = $mm->distmeta_target;Generates the distmeta target to add META.yml to the MANIFEST in the distdir.
Defines the realclean target.
my $make_frag = $MM->realclean_subdirs_target;Returns the realclean_subdirs target. This is used by the realclean target to call realclean on any subdirectories which contain Makefiles.
my $target = $mm->signature_target;Generate the signature target.
Writes the file SIGNATURE with "cpansign -s".
my $make_frag = $mm->distsignature_target;Generates the distsignature target to add SIGNATURE to the MANIFEST in the distdir.
my $make_frag = $mm->special_targetsReturns a make fragment containing any targets which have special meaning to make. For example, .SUFFIXES and .PHONY.
Methods which help initialize the MakeMaker object and macros.
$mm->init_ABSTRACT$mm->init_INST;Called by init_main. Sets up all INST_* variables except those related to XS code. Those are handled in init_xs.
$mm->init_INSTALL;Called by init_main. Sets up all INSTALL_* variables (except INSTALLDIRS) and *PREFIX.
$mm->init_INSTALL_from_PREFIX;$mm->init_from_INSTALL_BASE$mm->init_VERSIONInitialize macros representing versions of MakeMaker and other tools
MAKEMAKER: path to the MakeMaker module.
MM_VERSION: ExtUtils::MakeMaker Version
MM_REVISION: ExtUtils::MakeMaker version control revision (for backwards compat)
VERSION: version of your module
VERSION_MACRO: which macro represents the version (usually 'VERSION')
VERSION_SYM: like version but safe for use as an RCS revision number
DEFINE_VERSION: -D line to set the module version when compiling
XS_VERSION: version in your .xs file. Defaults to $(VERSION)
XS_VERSION_MACRO: which macro represents the XS version.
XS_DEFINE_VERSION: -D line to set the xs version when compiling.
Called by init_main.
$MM->init_others();Initializes the macro definitions used by tools_other() and places them in the $MM object.
If there is no description, its the same as the parameter to WriteMakefile() documented in ExtUtils::MakeMaker.
Defines at least these macros.
Macro Description
NOOP Do nothing
NOECHO Tell make not to display the command itself
MAKEFILE
FIRST_MAKEFILE
MAKEFILE_OLD
MAKE_APERL_FILE File used by MAKE_APERL
SHELL Program used to run shell commands
ECHO Print text adding a newline on the end
RM_F Remove a file
RM_RF Remove a directory
TOUCH Update a file's timestamp
TEST_F Test for a file's existence
CP Copy a file
MV Move a file
CHMOD Change permissions on a file
FALSE Exit with non-zero
TRUE Exit with zero
UMASK_NULL Nullify umask
DEV_NULL Suppress all command outputmy $make_frag = $MM->tools_other;Returns a make fragment containing definitions for the macros init_others() initializes.
$MM->init_DIRFILESEP;
my $dirfilesep = $MM->{DIRFILESEP};Initializes the DIRFILESEP macro which is the seperator between the directory and filename in a filepath. ie. / on Unix, \ on Win32 and nothing on VMS.
For example:
# instead of $(INST_ARCHAUTODIR)/extralibs.ld
$(INST_ARCHAUTODIR)$(DIRFILESEP)extralibs.ldSomething of a hack but it prevents a lot of code duplication between MM_* variants.
Do not use this as a seperator between directories. Some operating systems use different seperators between subdirectories as between directories and filenames (for example: VOLUME:[dir1.dir2]file on VMS).
$mm->init_linker;Initialize macros which have to do with linking.
PERL_ARCHIVE: path to libperl.a equivalent to be linked to dynamic extensions.
PERL_ARCHIVE_AFTER: path to a library which should be put on the linker command line after the external libraries to be linked to dynamic extensions. This may be needed if the linker is one-pass, and Perl includes some overrides for C RTL functions, such as malloc().
EXPORT_LIST: name of a file that is passed to linker to define symbols to be exported.
Some OSes do not need these in which case leave it blank.
$mm->init_platformInitialize any macros which are for platform specific use only.
A typical one is the version number of your OS specific mocule. (ie. MM_Unix_VERSION or MM_VMS_VERSION).
$mm->init_MAKEInitialize MAKE from either a MAKE environment variable or $Config{make}.
A grab bag of methods to generate specific macros and commands.
Defines targets and routines to translate the pods into manpages and put them into the INST_* directories.
my $pod2man_macro = $self->POD2MAN_macroReturns a definition for the POD2MAN macro. This is a program which emulates the pod2man utility. You can add more switches to the command by simply appending them on the macro.
Typical usage:
$(POD2MAN) --section=3 --perm_rw=$(PERM_RW) podfile1 man_page1 ...my $command = $mm->test_via_harness($perl, $tests);Returns a $command line which runs the given set of $tests with Test::Harness and the given $perl.
Used on the t/*.t files.
my $command = $mm->test_via_script($perl, $script);Returns a $command line which just runs a single test without Test::Harness. No checks are done on the results, they're just printed.
Used for test.pl, since they don't always follow Test::Harness formatting.
Defines a simple perl call that runs autosplit. May be deprecated by pm_to_blib soon.
my $arch_ok = $mm->arch_check(
$INC{"Config.pm"},
File::Spec->catfile($Config{archlibexp}, "Config.pm")
);A sanity check that what Perl thinks the architecture is and what Config thinks the architecture is are the same. If they're not it will return false and show a diagnostic message.
When building Perl it will always return true, as nothing is installed yet.
The interface is a bit odd because this is the result of a quick refactoring. Don't rely on it.
ExtUtils::MM_Any is a subclass of File::Spec. The methods noted here override File::Spec.
File::Spec <= 0.83 has a bug where the file part of catfile is not canonicalized. This override fixes that bug.
Methods I can't really figure out where they should go yet.
my $test = $mm->find_tests;Returns a string suitable for feeding to the shell to return all tests in t/*.t.
my @files_to_clean = $MM->extra_clean_files;Returns a list of OS specific files to be removed in the clean target in addition to the usual set.
my @installvars = $mm->installvars;A list of all the INSTALL* variables without the INSTALL prefix. Useful for iteration or building related variable sets.
my $wanted = $self->libscan($path);Takes a path to a file or dir and returns an empty string if we don't want to include this file in the library. Otherwise it returns the the $path unchanged.
Mainly used to exclude version control administrative directories from installation.
my $make_frag = $mm->platform_constantsReturns a make fragment defining all the macros initialized in init_platform() rather than put them in constants().
Michael G Schwern <schwern@pobox.com> and the denizens of makemaker@perl.org with code from ExtUtils::MM_Unix and ExtUtils::MM_Win32.