deb-symbols(5) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO | COLOPHON

deb-symbols(5)                 dpkg suite                 deb-symbols(5)

NAME         top

       deb-symbols - Debian's extended shared library information file

SYNOPSIS         top

       symbols

DESCRIPTION         top

       The symbol files are shipped in Debian binary packages, and its
       format is a subset of the template symbol files used by
       dpkg-gensymbols(1) in Debian source packages.

       The format for an extended shared library dependency information
       entry in these files is:

       library-soname main-dependency-template
       [| alternative-dependency-template]
       [...]
       [* field-name: field-value]
       [...]
        symbol minimal-version [id-of-dependency-template]

       The library-soname is exactly the value of the SONAME field as
       exported by objdump(1). A dependency-template is a dependency
       where #MINVER# is dynamically replaced either by a version check
       like “(>= minimal-version)” or by nothing (if an unversioned
       dependency is deemed sufficient).

       Each exported symbol (listed as name@version, with version being
       “Base” if the library is not versioned) is associated to a
       minimal-version of its dependency template (the main dependency
       template is always used and will end up being combined with the
       dependency template referenced by id-of-dependency-template if
       present). The first alternative dependency template is numbered
       1, the second one 2, etc.

       Each entry for a library can also have some fields of meta-
       information.  Those fields are stored on lines starting with an
       asterisk. Currently, the only valid fields are:

       Build-Depends-Package
              It indicates the name of the “-dev” package associated to
              the library and is used by dpkg-shlibdeps to make sure
              that the dependency generated is at least as strict as the
              corresponding build dependency (since dpkg 1.14.13).

       Ignore-Blacklist-Groups
              It indicates what blacklist groups should be ignored, as a
              whitespace separated list, so that the symbols contained
              in those groups get included in the output file (since
              dpkg 1.17.6).  This should only be necessary for toolchain
              packages providing those blacklisted symbols. The
              available groups are system dependent, for ELF and GNU-
              based systems these are aeabi and gomp.

EXAMPLES         top

   Simple symbols file
       libftp.so.3 libftp3 #MINVER#
        DefaultNetbuf@Base 3.1-1-6
        FtpAccess@Base 3.1-1-6
        [...]

   Advanced symbols file
       libGL.so.1 libgl1
       | libgl1-mesa-glx #MINVER#
       * Build-Depends-Package: libgl1-mesa-dev
        publicGlSymbol@Base 6.3-1
        [...]
        implementationSpecificSymbol@Base 6.5.2-7 1
        [...]

SEE ALSO         top

       https://wiki.debian.org/Projects/ImprovedDpkgShlibdeps 
       dpkg-shlibdeps(1), dpkg-gensymbols(1).

COLOPHON         top

       This page is part of the dpkg (Debian Package Manager) project.
       Information about the project can be found at 
       ⟨https://wiki.debian.org/Teams/Dpkg/⟩.  If you have a bug report
       for this manual page, see
       ⟨http://bugs.debian.org/cgi-bin/pkgreport.cgi?src=dpkg⟩.  This
       page was obtained from the project's upstream Git repository
       ⟨https://salsa.debian.org/dpkg-team/dpkg.git⟩ on 2021-08-27.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2021-06-17.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

1.19.6-2-g6e42d5               2019-03-25                 deb-symbols(5)

Pages that refer to this page: dpkg-gensymbols(1)dpkg-shlibdeps(1)deb(5)deb-shlibs(5)