DH_DWZ(1) Debhelper DH_DWZ(1)
dh_dwz - optimize DWARF debug information in ELF binaries via dwz
dh_dwz [debhelperoptions] [-Xitem] [--params]
Caveat: This tool is experimental and may disappear or change behaviour
without any notice.
dh_dwz is a debhelper program that will optimize the (uncompressed)
size of the DWARF debug information in ELF binaries. It does so by
running dwz(1) on all the ELF binaries in the package.
Whether dwz(1) should generate a multifile from the ELF binaries in
the same package (it does by default). When enabled, if a package
ships at least 2 ELF binaries, dh_dwz will instruct dwz(1) to
generate a multifile for the package.
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
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.
Pass params to dwz(1) when it processes ELF binaries. This is
mostly useful for setting memory related parameters (e.g. -l and
If the DEB_BUILD_OPTIONS environment variable contains nostrip, nothing
will be stripped, in accordance with Debian policy (section 10.1
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>
11.3.5 2018-06-30 DH_DWZ(1)