™.. PERLMACOSX - Online Linux Manual PageSection : 1
Updated : 2009-03-30
Source : perl v5.10.1
Note : Perl Programmers Reference Guide
NAMEREADME.macosx − Perl under Mac OS X
SYNOPSISThis document briefly describes perl under Mac OS X.
DESCRIPTIONThe latest Perl release (5.8.8 as of this writing) builds without changes under Mac OS X. Under 10.3 ‟Panther” and newer OS versions, all self-tests pass, and all standard features are supported. Earlier Mac OS X releases (10.2 ‟Jaguar” and older) did not include a completely thread-safe libc, so threading is not fully supported. Also, earlier releases included a buggy libdb, so some of the DB_File tests are known to fail on those releases.
Installation PrefixThe default installation location for this release uses the traditional ​UNIX directory layout under /usr/local. This is the recommended location for most users, and will leave the Apple-supplied Perl and its modules undisturbed. Using an installation prefix of '/usr' will result in a directory layout that mirrors that of Apple's default Perl, with core modules stored in ​'/System/Library/Perl/${version}', CPAN modules stored in ​'/Library/Perl/${version}', and the addition of ​'/Network/Library/Perl/${version}' to @INC for modules that are stored on a file server and used by many Macs.
SDK supportFirst, export the path to the SDK into the build environment: ​ export SDK=/Developer/SDKs/MacOSX10.3.9.sdk Use an SDK by exporting some additions to Perl's 'ccflags' and '..flags' config variables: ​ ./Configure −Accflags="−nostdinc −B$SDK/usr/include/gcc \ ​ −B$SDK/usr/lib/gcc −isystem$SDK/usr/include \ ​ −F$SDK/System/Library/Frameworks" \ ​ −Aldflags="−Wl,−syslibroot,$SDK" \ ​ −de
Universal Binary supportTo compile perl as a universal binary (built for both ppc and intel), export the SDK variable as above, selecting the 10.4u SDK: ​ export SDK=/Developer/SDKs/MacOSX10.4u.sdk In addition to the compiler flags used to select the SDK, also add the flags for creating a universal binary: ​ ./Configure −Accflags="−arch i686 −arch ppc −nostdinc −B$SDK/usr/include/gcc \ ​ −B$SDK/usr/lib/gcc −isystem$SDK/usr/include \ ​ −F$SDK/System/Library/Frameworks" \ ​ −Aldflags="−arch i686 −arch ppc −Wl,−syslibroot,$SDK" \ ​ −de In Leopard (MacOSX 10.5.6 at the time of this writing) you must use the 10.5 SDK: ​ export SDK=/Developer/SDKs/MacOSX10.5.sdk You can use the same compiler flags you would use with the 10.4u SDK. Keep in mind that these compiler and linker settings will also be used when building CPAN modules. For XS modules to be compiled as a universal binary, any libraries it links to must also be universal binaries. The system libraries that Apple includes with the 10.4u SDK are all universal, but user-installed libraries may need to be re-installed as universal binaries.
64−bit PPC supportFollow the instructions in INSTALL to build perl with support for 64−bit integers (\*(C`use64bitint\*(C'\fR) or both 64\-bit integers and 64\-bit addressing (\*(C`use64bitall\*(C'\fR). In the latter case, the resulting binary will run only on G5−based hosts. Support for 64−bit addressing is experimental: some aspects of Perl may be omitted or buggy. Note the messages output by Configure for further information. Please use \*(C`perlbug\*(C'\fR to submit a problem report in the event that you encounter difficulties. When building 64−bit modules, it is your responsiblity to ensure that linked external libraries and frameworks provide 64−bit support: if they do not, module building may appear to succeed, but attempts to use the module will result in run-time dynamic linking errors, and subsequent test failures. You can use \*(C`file\*(C'\fR to discover the architectures supported by a library: ​ $ file libgdbm.3.0.0.dylib ​ libgdbm.3.0.0.dylib: Mach−O fat file with 2 architectures ​ libgdbm.3.0.0.dylib (for architecture ppc): Mach−O dynamically linked shared library ppc ​ libgdbm.3.0.0.dylib (for architecture ppc64): Mach−O 64−bit dynamically linked shared library ppc64 Note that this issue precludes the building of many Macintosh-specific CPAN modules (\*(C`Mac::*\*(C'\fR), as the required Apple frameworks do not provide \s-1PPC64\s0 support. Similarly, downloads from Fink or Darwinports are unlikely to provide 64−bit support; the libraries must be rebuilt from source with the appropriate compiler and linker flags. For further information, see Apple's ​64−Bit Transition Guide at <http://developer.apple.com/documentation/Darwin/Conceptual/64bitPorting/index.html>.
libperl and PrebindingMac OS X ships with a dynamically-loaded libperl, but the default for this release is to compile a static libperl. The reason for this is pre-binding. Dynamic libraries can be pre-bound to a specific address in memory in order to decrease load time. To do this, one needs to be aware of the location and size of all previously-loaded libraries. Apple collects this information as part of their overall OS build process, and thus has easy access to it when building Perl, but ordinary users would need to go to a great deal of effort to obtain the information needed for pre-binding. You can override the default and build a shared libperl if you wish (Configure ... −Duseshrlib), but the load time on pre−10.4 OS releases will be greater than either the static library, or Apple's pre-bound dynamic library. With 10.4 ‟Tiger” and newer, Apple has all but eliminated the performance penalty for non-prebound libraries.
Updating Apple's PerlIn a word − don't, at least without a *very* good reason. Your scripts can just as easily begin with ‟#!/usr/local/bin/perl” as with ​‟#!/usr/bin/perl”. Scripts supplied by Apple and other third parties as part of installation packages and such have generally only been tested with the /usr/bin/perl that's installed by Apple. If you find that you do need to update the system Perl, one issue worth keeping in mind is the question of static vs. dynamic libraries. If you upgrade using the default static libperl, you will find that the dynamic libperl supplied by Apple will not be deleted. If both libraries are present when an application that links against libperl is built, ld will link against the dynamic library by default. So, if you need to replace Apple's dynamic libperl with a static libperl, you need to be sure to delete the older dynamic library after you've installed the update.
Known problemsIf you have installed extra libraries such as GDBM through Fink (in other words, you have libraries under /sw/lib), or libdlcompat to /usr/local/lib, you may need to be extra careful when running Configure to not to confuse Configure and Perl about which libraries to use. Being confused will show up for example as ‟dyld” errors about symbol problems, for example during ‟make test”. The safest bet is to run Configure as ​ Configure ... −Uloclibpth −Dlibpth=/usr/lib to make Configure look only into the system libraries. If you have some extra library directories that you really want to use (such as newer Berkeley DB libraries in pre-Panther systems), add those to the libpth: ​ Configure ... −Uloclibpth −Dlibpth='/usr/lib /opt/lib' The default of building Perl statically may cause problems with complex applications like Tk: in that case consider building shared Perl ​ Configure ... −Duseshrplib but remember that there's a startup cost to pay in that case (see above ​‟libperl and Prebinding”). Starting with Tiger (Mac OS X 10.4), Apple shipped broken locale files for the eu_ES locale (Basque-Spain). In previous releases of Perl, this resulted in failures in the \*(C`lib/locale\*(C'\fR test. These failures have been supressed in the current release of Perl by making the test ignore the broken locale. If you need to use the eu_ES locale, you should contact Apple support.
MacPerlQuite a bit has been written about MacPerl, the Perl distribution for ​‟Classic MacOS” − that is, versions 9 and earlier of MacOS. Because it runs in environment that's very different from that of UNIX, many things are done differently in MacPerl. Modules are installed using a different procedure, Perl itself is built differently, path names are different, etc. From the perspective of a Perl programmer, Mac OS X is more like a traditional UNIX than Classic MacOS. If you find documentation that refers to a special procedure that's needed for MacOS that's drastically different from the instructions provided for UNIX, the MacOS instructions are quite often intended for MacPerl on Classic MacOS. In that case, the correct procedure on Mac OS X is usually to follow the ​UNIX instructions, rather than the MacPerl instructions.
CarbonMacPerl ships with a number of modules that are used to access the classic MacOS toolbox. Many of these modules have been updated to use Mac OS X's newer ‟Carbon” toolbox, and are available from CPAN in the ​‟Mac::Carbon” module.
CocoaThere are two ways to use Cocoa from Perl. Apple's PerlObjCBridge module, included with Mac OS X, can be used by standalone scripts to access Foundation (i.e. non-GUI) classes and objects. An alternative is CamelBones, a framework that allows access to both Foundation and AppKit classes and objects, so that full GUI applications can be built in Perl. CamelBones can be found on SourceForge, at <http://www.sourceforge.net/projects/camelbones/>.
Starting From ScratchUnfortunately it is not that difficult somehow manage to break one's Mac OS X Perl rather severely. If all else fails and you want to really, REALLY, start from scratch and remove even your Apple Perl installation (which has become corrupted somehow), the following instructions should do it. Please think twice before following these instructions: they are much like conducting brain surgery to yourself. Without anesthesia. We will not come to fix your system if you do this. First, get rid of the libperl.dylib: ​ # cd /System/Library/Perl/darwin/CORE ​ # rm libperl.dylib Then delete every .bundle file found anywhere in the folders: ​ /System/Library/Perl ​ /Library/Perl You can find them for example by ​ # find /System/Library/Perl /Library/Perl −name '*.bundle' −print After this you can either copy Perl from your operating system media (you will need at least the /System/Library/Perl and /usr/bin/perl), or rebuild Perl from the source code with \*(C`Configure \-Dprefix=/usr ​−Dusershrplib\*(C'\fR \s-1NOTE:\s0 the \f(CW\*(C`\-Dprefix=/usr\*(C'\fR to replace the system Perl works much better with Perl 5.8.1 and later, in Perl 5.8.0 the settings were not quite right. ​‟Pacifist” from CharlesSoft (<http://www.charlessoft.com/>) is a nice way to extract the Perl binaries from the OS media, without having to reinstall the entire OS.
AUTHORThis README was written by Sherm Pendley <sherm@dot−app.org>, and subsequently updated by Dominic Dunlop <domo@computer.org>. The ‟Starting From Scratch” recipe was contributed by John Montbriand <montbriand@apple.com>.
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