deb-symbols(5) dpkg suite deb-symbols(5)
deb-symbols - Debian's extended shared library information file
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:
[* 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
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:
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).
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
Simple symbols file
libftp.so.3 libftp3 #MINVER#
Advanced symbols file
| libgl1-mesa-glx #MINVER#
* Build-Depends-Package: libgl1-mesa-dev
implementationSpecificSymbol@Base 6.5.2-7 1
22.214.171.124 2022-05-25 deb-symbols(5)
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