DH_DWZ(1) Debhelper DH_DWZ(1)
dh_dwz - optimize DWARF debug information in ELF binaries via dwz
dh_dwz [debhelper options] [-Xitem] [-- params]
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.
--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 --compress-debug-sections. 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 10.1 "Binaries"). 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.
debhelper(7) This program is a part of debhelper.
Niels Thykier <email@example.com>
This page is part of the debhelper (helper programs for debian/rules) project. Information about the project can be found at [unknown -- if you know, please contact man- firstname.lastname@example.org] If you have a bug report for this manual page, send it to email@example.com. This page was obtained from the project's upstream Git repository ⟨https://salsa.debian.org/debian/debhelper.git⟩ on 2021-08-27. (At that time, the date of the most recent commit that was found in the repository was 2021-08-24.) 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 firstname.lastname@example.org 13.4+nmu1 2021-08-19 DH_DWZ(1)
Pages that refer to this page: dh(1), debhelper(7)