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– Perl Source –
Perl ships with a number of standard extensions. By default, Configure will offer to build every extension which appears to be supported. The extensions listed in noextensions are removed from the list of extensions to build, while the onlyextensions is rather more severe and builds only the listed extensions. The latter should be used with extreme caution since certain extensions are used by many other extensions and modules: examples of such modules include Fcntl and IO.
The order of processing these options is first only if present , then no if present. Most users probably shouldn’t have to do this — it is usually easier to build additional extensions later after perl has been installed. However, if you wish to have those additional extensions statically linked into the perl binary, then this offers a convenient way to do that in one step.
It is not necessary, however; you can build and install extensions just fine even if you don’t have dynamic loading. Another way of specifying extra modules is described in “Adding extra modules to the build” below. If you re-use an old config. Perl comes with interfaces to number of libraries, including threads, dbm, ndbm, gdbm, and Berkeley db.
The threading extension needs to be specified explicitly see “Threads”. Those libraries are not distributed with perl. If your header. See the examples below. This example assumes you have gdbm. Configure should figure all the necessary steps out automatically.
Again, this should all happen automatically. Also, you will need to add appropriate linker flags to tell the runtime linker where to find the BerkeleyDB shared libraries. Configure will automatically add the appropriate -I directives. Configure will automatically add the appropriate -L directives. The addition to ldflags is so that the dynamic linker knows where to find the BerkeleyDB libraries.
For Linux and Solaris, the -R option does that. Other systems may use different flags. Use the appropriate flag for your system. If you are cross-compiling, or are using a compiler which has it’s own headers and libraries in a nonstandard location, and your compiler understands the –sysroot option, you can use the -Dsysroot option to specify the logical root directory under which all libraries and headers are searched for.
If you want to use an old config. If you prefer the GNU-style configure command line interface, you can use the supplied configure. The file is called configure. Perl relies heavily on malloc 3 to grow data structures as needed, so perl’s performance can be noticeably affected by the performance of the malloc function on your system. The perl source is shipped with a version of malloc that has been optimized for the typical requests from perl, so there’s a chance that it may be both faster and use less memory than your system malloc.
However, if your system already has an excellent malloc, or if you are experiencing difficulties with extensions that use third-party libraries that call malloc, then you should probably use your system’s malloc. Or, you might wish to explore the malloc flags discussed below.
Note that Perl’s malloc isn’t always used by default; that actually depends on your system. NOTE: This flag is enabled automatically on some platforms if you just run Configure to accept all the defaults.
These names do not clash with the system versions of these functions. If this flag is enabled, however, Perl’s malloc family of functions will have the same names as the system versions. Note that enabling this option may sometimes lead to duplicate symbols from the linker for malloc et al.
In such cases, the system probably does not allow its malloc functions to be fully replaced with custom versions. This flag enables debugging mstats, which is required to use the Devel::Peek::mstat function.
You cannot enable this unless you are using Perl’s malloc, so a typical Configure command would be. If you run into problems, try some of the following ideas. If none of them help, then see “Reporting Problems” below. If Configure runs into trouble, remember that you can always run Configure interactively so that you can check and correct its guesses. All the installation questions have been moved to the top, so you don’t have to wait for them.
If you find yourself trying obscure command line incantations and config. You’ll probably save yourself time in the long run. The peculiarities or conventions of particular platforms — non-standard library locations and names, default installation locations for binaries, and so on.
The deficiencies of the platform — for example, library functions that, although present, are too badly broken to be usable; or limits on resources that are generously available on most platforms. Because of wide variations in the implementation of shared libraries and of threading, for example, Configure often needs hints in order to be able to use these features.
If one of them matches your system, Configure will offer to use that hint file. Unless you have a very good reason not to, you should accept its offer. Several of the hint files contain additional important information. If you have any problems, it is a good idea to read the relevant hint file for further information. Note that any hint file is read before any Policy file, meaning that Policy overrides hints — see “Site-wide Policy settings”. If you are re-using an old config.
You will almost always want to keep the previous value, unless you have changed something on your system. For example, suppose you have added libgdbm. When you run Configure again, you will need to add -lgdbm to the list of libraries. Now, Configure will find your gdbm include file and library and will issue a message:. In this case, you do not want to keep the previous value, so you should answer ‘n’.
If you change compilers or make other significant changes, you should probably not re-use your old config. Simply remove it or rename it, then rerun Configure with the options you want to use. You can also supply a shell script config. It will get loaded up at the very end, just before config.
You have to be careful with this, however, as Configure does no checking that your changes make sense. This file is usually good for site-specific customizations. There is also another file that, if it exists, is loaded before the config. This file is intended to be per architecture, not per site, and usually it’s the architecture-specific hints file that creates the config.
Many of the system dependencies are contained in config. Configure builds config. SH script. The values for the variables are taken from config. If there are any problems, you can edit config. Beware, though, that the next time you run Configure, your changes will be lost. If you have any additional changes to make to the C compiler command line, they can be made in cflags.
For instance, to turn off the optimizer on toke. You should not edit the generated file cflags directly, as your changes will be lost the next time you run Configure, or if you edit config. To change the C flags for all the files, edit config. You’ll probably also have to extensively modify the extension building mechanism. Additional information, including a glossary of all those config. Ports for other systems may also be available.
Study also how other non-UNIX ports have solved problems. You can specify extra modules or module bundles to be fetched from the CPAN and installed as part of the Perl build.
The module or the bundle names are as for the CPAN module ‘install’ command. This will only work if those modules are to be built as dynamic extensions. If you wish to include those extra modules as static extensions, see “Extensions” above. If you do not, using the extra modules option will die horribly. Also notice that you yourself are responsible for satisfying any extra dependencies such as external headers or libraries BEFORE trying the build.
For example: you will need to have the Foo database specific headers and libraries installed for the DBD::Foo module. The Configure process or the Perl build process will not help you with these.
It is no longer available. Instead, use a tool specifically designed to handle changes in privileges, such as sudo.
This will look for all the includes. The output is stored in makefile. The only difference between Makefile and makefile is the dependencies at the bottom of makefile. If you have to make any changes, you should edit makefile, not Makefile, since the Unix make command reads makefile first.
On non-Unix systems, the output may be stored in a different file. If you can’t compile successfully, try some of the following ideas. If none of them help, and careful reading of the error message and the relevant manual pages on your system doesn’t help, then see “Reporting Problems” below. If you used a hint file, try reading the comments in the hint file for further tips and information. If you can successfully build miniperl, but the process crashes during the building of extensions, run.
If you have any locale-related environment variables set, try unsetting them. I have some reports that some versions of IRIX hang while running. The latter is especially useful if you see something like this. Configure does not check for environment variables that can sometimes have a major influence on how perl is built or tested. So if you are getting strange test failures, you may want to try retesting with the various PERL variables unset.
If you’re creating a static Perl library libperl. If Configure seems to be having trouble finding library functions, try not using nm extraction.
You can do this from the command line with. If you have previously run Configure, you should not reuse your old config. If the build processes encounters errors relating to umask , the problem is probably that Configure couldn’t find your umask system call. Check your config. If you don’t, this is probably the “nm extraction” problem discussed above.
Also, try reading the hints file for your system for further information. Follow the procedure in the previous item on “nm extraction”. Versions of BIND later than 8. You should probably update to a newer version of BIND and remove the files the old one left behind.
If you can’t, you can either link with the updated resolver library provided with BIND 8. This section provides a tutorial example on how to install ActivePerl v5. If you are using a Windows system and want to run Perl scripts, you can install the free binary package, ActivePerl, provided by ActiveState. Here is what I did to install ActivePerl v5.
Go to activestate. Double click on the downloaded file name: ActivePerl Open a command window, and type in “perl -v”. If you see the following output, your installation is ok. We allow sign-up with GitHub and provide documentation on many Perl programming topics such as using Perl with html, Perl scripts, and more in our community forum.
An active runtime is the number of instances of software from the ActiveState Platform that are run in a 24 hour period. If you need more than one Active Runtime, please see our Plans and Pricing page. Read this file if you want to know how to handle a source code archive after you’ve downloaded it. Third-party and other add-on source packages needed in order to build certain perl configurations.
You do not need any of this stuff to build a default configuration. This is where we hid the source for perl4, which was superseded by perl5 years ago.
We would really much rather that you didn’t use it. It is definitely obsolete and has security and other bugs. And, since it’s unsupported, it will continue to have them. Files relevant to the security problem found in ‘suidperl’ in August , reported in the bugtraq mailing list.
Garberville, CA Postal service only. Post by Spencer Chase TK has been gone for a while now. TKX is a lot better for new applications but converting old scripts is a lot of work for anything not short and simple.
I have to maintain duplicate installations to be able to maintain my old TK stuff and it is a real challenge to keep everything working.
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