ExtUtils::MM_Any(Perl Programmers Reference GExtUtils::MM_Any(3p)NAMEExtUtils::MM_Any - Platform-agnostic MM methods
SYNOPSIS
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);
DESCRIPTION
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!
METHODS
Any methods marked Abstract must be implemented by subc-
lasses.
Cross-platform helper methods
These are methods which help writing cross-platform code.
os_flavor Abstract
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 fami-
lies.
Some examples:
Cygwin98 ('Unix', 'Cygwin', 'Cygwin9x')
Windows NT ('Win32', 'WinNT')
Win98 ('Win32', 'Win9x')
Linux ('Unix', 'Linux')
MacOS X ('Unix', 'Darwin', 'MacOS', 'MacOS X')
OS/2 ('OS/2')
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This is used to write code for styles of operating system.
See os_flavor_is() for use.
os_flavor_is
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`;
}
split_command
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 process-
ing 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 argu-
ments.
If no @args are given, no @cmds will be returned.
Pairs of arguments will always be preserved in a single com-
mand, 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);
echo
my @commands = $MM->echo($text);
my @commands = $MM->echo($text, $file);
my @commands = $MM->echo($text, $file, $appending);
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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.
wraplist
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 \
BAZ
cd Abstract
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 && $cmd
Currently $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
CODE
oneliner Abstract
my $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
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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
CODE
Usage 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.
quote_literal Abstract
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.
escape_newlines Abstract
my $escaped_text = $MM->escape_newlines($text);
Shell escapes newlines in $text.
max_exec_len Abstract
my $max_exec_len = $MM->max_exec_len;
Calculates the maximum command size the OS can exec. Effec-
tively, this is the max size of a shell command line.
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Targets
These are methods which produce make targets.
all_target
Generate the default target 'all'.
blibdirs_target
my $make_frag = $mm->blibdirs_target;
Creates the blibdirs target which creates all the direc-
tories we use in blib/.
The blibdirs.ts target is deprecated. Depend on blibdirs
instead.
clean (o)
Defines the clean target.
clean_subdirs_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.
dir_target
my $make_frag = $mm->dir_target(@directories);
Generates targets to create the specified directories and
set its permission to 0755.
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 direc-
tory. It is this you should depend on. For portability pur-
poses you should use the $(DIRFILESEP) macro rather than a
'/' to seperate the directory from the file.
yourdirectory$(DIRFILESEP).exists
distdir
Defines the scratch directory target that will hold the dis-
tribution before tar-ing (or shar-ing).
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dist_test
Defines a target that produces the distribution in the
scratchdirectory, and runs 'perl Makefile.PL; make ;make
test' in that subdirectory.
dynamic (o)
Defines the dynamic target.
makemakerdflt_target
my $make_frag = $mm->makemakerdflt_target
Returns 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.
manifypods_target
my $manifypods_target = $self->manifypods_target;
Generates the manifypods target. This target generates man
pages from all POD files in MAN1PODS and MAN3PODS.
metafile_target
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. Additionally, we include:
version_from
installdirs
distmeta_target
my $make_frag = $mm->distmeta_target;
Generates the distmeta target to add META.yml to the MANI-
FEST in the distdir.
realclean (o)
Defines the realclean target.
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realclean_subdirs_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.
signature_target
my $target = $mm->signature_target;
Generate the signature target.
Writes the file SIGNATURE with "cpansign -s".
distsignature_target
my $make_frag = $mm->distsignature_target;
Generates the distsignature target to add SIGNATURE to the
MANIFEST in the distdir.
special_targets
my $make_frag = $mm->special_targets
Returns a make fragment containing any targets which have
special meaning to make. For example, .SUFFIXES and .PHONY.
Init methods
Methods which help initialize the MakeMaker object and mac-
ros.
init_INST
$mm->init_INST;
Called by init_main. Sets up all INST_* variables except
those related to XS code. Those are handled in init_xs.
init_INSTALL
$mm->init_INSTALL;
Called by init_main. Sets up all INSTALL_* variables
(except INSTALLDIRS) and *PREFIX.
init_INSTALL_from_PREFIX
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$mm->init_INSTALL_from_PREFIX;
init_from_INSTALLBASE
$mm->init_from_INSTALLBASE
init_VERSION Abstract
$mm->init_VERSION
Initialize 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 revi-
sion number
DEFINE_VERSION: -D line to set the module version when com-
piling
XS_VERSION: version in your .xs file. Defaults to $(VER-
SION)
XS_VERSION_MACRO: which macro represents the XS version.
XS_DEFINE_VERSION: -D line to set the xs version when com-
piling.
Called by init_main.
init_others Abstract
$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.
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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
UMASK_NULL Nullify umask
DEV_NULL Supress all command output
init_DIRFILESEP Abstract
$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.ld
Something of a hack but it prevents a lot of code duplica-
tion between MM_* variants.
Do not use this as a seperator between directories. Some
operating systems use different seperators between subdirec-
tories as between directories and filenames (for example:
VOLUME:[dir1.dir2]file on VMS).
init_linker Abstract
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$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.
init_platform
$mm->init_platform
Initialize 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).
Tools
A grab bag of methods to generate specific macros and com-
mands.
manifypods
Defines targets and routines to translate the pods into man-
pages and put them into the INST_* directories.
POD2MAN_macro
my $pod2man_macro = $self->POD2MAN_macro
Returns a definition for the POD2MAN macro. This is a pro-
gram 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 ...
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test_via_harness
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.
test_via_script
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.
tool_autosplit
Defines a simple perl call that runs autosplit. May be
deprecated by pm_to_blib soon.
File::Spec wrappers
ExtUtils::MM_Any is a subclass of File::Spec. The methods
noted here override File::Spec.
catfile
File::Spec <= 0.83 has a bug where the file part of catfile
is not canonicalized. This override fixes that bug.
Misc
Methods I can't really figure out where they should go yet.
find_tests
my $test = $mm->find_tests;
Returns a string suitable for feeding to the shell to return
all tests in t/*.t.
extra_clean_files
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.
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installvars
my @installvars = $mm->installvars;
A list of all the INSTALL* variables without the INSTALL
prefix. Useful for iteration or building related variable
sets.
libscan
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. Other-
wise it returns the the $path unchanged.
Mainly used to exclude version control administrative direc-
tories from installation.
platform_constants
my $make_frag = $mm->platform_constants
Returns a make fragment defining all the macros initialized
in init_platform() rather than put them in constants().
AUTHOR
Michael G Schwern <schwern@pobox.com> and the denizens of
makemaker@perl.org with code from ExtUtils::MM_Unix and
ExtUtils::MM_Win32.
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