version 2, including all changes.
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ldconfig |
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!!!ldconfig |
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NAME |
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SYNOPSIS |
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DESCRIPTION |
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OPTIONS |
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EXAMPLES |
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FILES |
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SEE ALSO |
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BUGS |
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AUTHORS |
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---- |
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!!NAME |
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ldconfig - determine run-time link bindings |
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!!SYNOPSIS |
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ldconfig [[OPTION...] |
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!!DESCRIPTION |
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__ldconfig__ creates the necessary links and cache (for |
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use by the run-time linker, ''ld.so'') to the most recent |
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shared libraries found in the directories specified on the |
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command line, in the file ''/etc/ld.so.conf'', and in the |
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trusted directories (''/usr/lib'' and ''/lib''). |
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__ldconfig__ checks the header and file names of the |
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libraries it encounters when determining which versions |
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should have their links updated. __ldconfig__ ignores |
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symbolic links when scanning for libraries. |
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__ldconfig__ will attempt to deduce the type of ELF libs |
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(ie. libc5 or libc6/glibc) based on what C libs if any the |
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library was linked against, therefore when making dynamic |
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libraries, it is wise to explicitly link against libc (use |
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-lc). |
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Some existing libs do not contain enough information to |
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allow the deduction of their type, therefore the |
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''/etc/ld.so.conf'' file format allows the specification |
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of an expected type. This is __only__ used for those ELF |
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libs which we can not work out. The format is like this |
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__not__ allowed. Also see the __-p__ |
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option. |
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Directory names containing an __=__ are no longer legal |
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unless they also have an expected type |
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specifier. |
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__ldconfig__ should normally be run by the super-user as |
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it may require write permission on some root owned |
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directories and files. It is normally run automatically at |
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bootup, from /etc/rc, or manually whenever new DLL's are |
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installed. |
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!!OPTIONS |
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__-v --verbose__ |
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Verbose mode. Print current version number, the name of each |
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directory as it is scanned and any links that are |
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created. |
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__-n__ |
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Only process directories specified on the command line. |
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Don't process the trusted directories (''/usr/lib'' and |
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''/lib'') nor those specified in ''/etc/ld.so.conf''. |
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Implies __-N__. |
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__-N__ |
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Don't rebuild the cache. Unless __-X__ is also specified, |
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links are still updated. |
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__-X__ |
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Don't update links. Unless __-N__ is also specified, the |
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cache is still rebuilt. |
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__-f conf__ |
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Use __conf__ instead of |
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''/etc/ld.so.conf''. |
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__-C cache__ |
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Use __cache__ instead of |
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''/etc/ld.so.cache''. |
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__-r root__ |
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Change to and use __root__ as the root |
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directory. |
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__-l__ |
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Library mode. Manually link individual libraries. Intended |
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for use by experts only. |
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__-p --print-cache__ |
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Print the lists of directories and candidate libraries |
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stored in the current cache. |
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__-c --format=FORMAT__ |
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Use __FORMAT__ for the cache file. Choices are old, new |
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and compat (the default). |
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__-? --help --usage__ |
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Print usage information. |
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__-V --version__ |
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Print version and exit. |
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!!EXAMPLES |
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In the bootup file ''/etc/rc'' having the |
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line |
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/sbin/ldconfig -v |
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will set up the correct links for the shared binaries and |
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rebuild the cache. |
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On the command line |
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# /sbin/ldconfig -n /lib |
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as root after the installation of a new DLL, will properly |
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update the shared library symbolic links in |
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/lib. |
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!!FILES |
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__/lib/ld.so, /lib/ld-linux.so.*__ |
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execution time linker/loader |
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__/etc/ld.so.conf__ |
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File containing a list of colon, space, tab, newline, or |
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comma spearated directories in which to search for |
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libraries. |
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__/etc/ld.so.cache__ |
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File containing an ordered list of libraries found in the |
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directories specified in __/etc/ld.so.conf__. This file |
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is not in human readable format, and is not intended to be |
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edited. |
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__lib*.so.version__ |
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shared libraries |
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!!SEE ALSO |
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2 |
perry |
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ldd(1), ld.so(8). |
1 |
perry |
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!!BUGS |
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__ldconfig__'s functionality, in conjunction with |
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__ld.so__, is only available for executables compiled |
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using libc version 4.4.3 or greater. |
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__ldconfig__, being a user process, must be run manually |
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and has no means of dynamically determining and relinking |
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shared libraries for use by __ld.so__ when a new DLL is |
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installed. |
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!!AUTHORS |
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David Engel and Mitch D'Souza. |
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---- |