Section: Debhelper (1)
dh_dwz - optimize DWARF debug information in ELF binaries via dwz
] [-- params
is a debhelper program that will optimize the (uncompressed)
size of the DWARF
debug information in ELF
binaries. It does so by
(1) on all the ELF
binaries in the package.
- --dwz-multifile, --no-dwz-multifile
Whether dwz(1) should generate a multifile from the ELF binaries
in the same package. When enabled, if a package ships at least 2 ELF
binaries, dh_dwz will instruct dwz(1) to generate a multifile
for the package.
By default, dh_dwz will attempt to create a multifile but will
continue without if dwz(1) does not create one (but succeeds anyway).
This commonly happens when the debug files do not contain debug
symbols (e.g. a missing -g to the compiler) or when the debug
symbols are compressed (see Debian bug #931891). If --dwz-multifile
is passed, then dh_dwz will abort with an error if dwz(1) does
not create a multifile.
Note this options may not work if a package contains more ELF binaries
than can fit on a single command line. If this becomes a problem,
please pass --no-dwz-multifile to work around the issue.
The generated multifile will be compressed with objcopy
Note for udeb packages: dh_dwz will never generate multifiles
for udeb packages. It will still use dwz to reduce the
file size of debug files if it finds any.
- -Xitem, --exclude=item
Exclude files that contain item anywhere in their filename from being
stripped. You may use this option multiple times to build up a list of
things to exclude.
- -- params
Pass params to dwz(1) when it processes ELF binaries. This is
mostly useful for setting memory related parameters (e.g. -l and -L).
If the DEB_BUILD_OPTIONS
environment variable contains nostrip
nothing will be stripped, in accordance with Debian policy (section
While this tool technically does not remove debug information from
binaries, it is still skipped when the DEB_BUILD_OPTIONS
environment variable contains nostrip. This is because nostrip
is often used to optimize build times (e.g. for ``build and
test''-cycles) rather than optimizing for size.
This program is a part of debhelper.
Niels Thykier <firstname.lastname@example.org