patchelf

https://github.com/NixOS/patchelf

PatchELF is a simple utility for modifying existing ELF executables and
libraries. In particular, it can do the following:

Change the dynamic loader (“ELF interpreter”) of executables:
```
$ patchelf --set-interpreter /lib/my-ld-linux.so.2 my-program
```

Change the RPATH of executables and libraries:

$ patchelf --set-rpath /opt/my-libs/lib:/other-libs my-program

Shrink the RPATH of executables and libraries:
```
$ patchelf --shrink-rpath my-program
```
This removes from the RPATH all directories that do not contain a
library referenced by DT_NEEDED fields of the executable or library.
For instance, if an executable references one library libfoo.so, has
an RPATH /lib:/usr/lib:/foo/lib, and libfoo.so can only be found
in /foo/lib, then the new RPATH will be /foo/lib.

In addition, the --allowed-rpath-prefixes option can be used for
further rpath tuning. For instance, if an executable has an RPATH
/tmp/build-foo/.libs:/foo/lib, it is probably desirable to keep
the /foo/lib reference instead of the /tmp entry. To accomplish
that, use:
```
$ patchelf --shrink-rpath --allowed-rpath-prefixes /usr/lib:/foo/lib my-program
```
Remove declared dependencies on dynamic libraries (DT_NEEDED
entries):
```
$ patchelf --remove-needed libfoo.so.1 my-program
```
This option can be given multiple times.
Add a declared dependency on a dynamic library (DT_NEEDED):
```
$ patchelf --add-needed libfoo.so.1 my-program
```
This option can be give multiple times.
Replace a declared dependency on a dynamic library with another one
(DT_NEEDED):
```
$ patchelf --replace-needed liboriginal.so.1 libreplacement.so.1 my-program
```
This option can be give multiple times.

Change SONAME of a dynamic library:

$ patchelf --set-soname libnewname.so.3.4.5 path/to/libmylibrary.so.1.2.3

Compiling and Testing

Via Autotools

./bootstrap.sh
./configure
make
make check
sudo make install

Via Nix

You can build with Nix in several ways.

Building via nix build will produce the result in ./result/bin/patchelf. If you would like to build patchelf with musl try nix build .#patchelf-musl
You can launch a development environment with nix develop and follow the autotools steps above. If you would like to develop with musl try nix develop .#musl

Author

License

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see http://www.gnu.org/licenses/.

Release History

0.14.5 (February 21, 2022):

fix faulty version in 0.14.4

0.14.4 (February 21, 2022):

Several test fixes to fix patchelf test suite on openbsd by @klemensn
Allow multiple modifications in same call by @fzakaria in https://github.com/NixOS/patchelf/pull/361
Add support to build with musl by @fzakaria in https://github.com/NixOS/patchelf/pull/362
Fix typo: s/folllow/follow/ by @bjornfor in https://github.com/NixOS/patchelf/pull/366
mips: fix incorrect polarity on dyn_offset; closes #364 by @a-m-joseph in https://github.com/NixOS/patchelf/pull/365

0.14.3 (December 05, 2021):

this release adds support for static, pre-compiled patchelf binaries

0.14.2 (November 29, 2021):

make version number in tarball easier to use for packagers

0.14.1 (November 28, 2021):

build fix: add missing include

0.14 (November 27, 2021):

Changes compared to 0.13:

Bug fixes:
- Fix corrupted library names when using --replace-needed multiple times
- Fix setting an empty rpath
- Don’t try to parse .dynamic section of type NOBITS
- Fix use-after-free in normalizeNoteSegments
- Correct EINTR handling in writeFile
- MIPS: Adjust PT_MIPS_ABIFLAGS segment and DT_MIPS_RLD_MAP_REL dynamic section if present
- Fix binaries without .gnu.hash section
Support loongarch architecture
Remove limits on output file size for elf files
Allow reading rpath from file
Requires now C++17 for building

0.13.1 (November 27, 2021):

Bug fixes:
- fix setting empty rpath
- use memcpy instead of strcpy to set rpath
- Don’t try to parse .dynamic section of type NOBITS
- fix use-after-free in normalizeNoteSegments
- correct EINTR handling in writeFile
- Adjust PT_MIPS_ABIFLAGS segment if present
- Adjust DT_MIPS_RLD_MAP_REL dynamic section entry if present
- fix binaries without .gnu.hash section

0.13 (August 5, 2021):

New --add-rpath flag.
Bug fixes.

0.12 (August 27, 2020):

New --clear-symbol-version flag.
Better support for relocating NOTE sections/segments.
Improved the default section alignment choice.
Bug fixes.

0.11 (June 9, 2020):

New --output flag.
Some bug fixes.

0.10 (March 28, 2019):

Many bug fixes. Please refer to the Git commit log:

https://github.com/NixOS/patchelf/commits/master

This release has contributions from Adam Trhoň, Benjamin Hipple,
Bernardo Ramos, Bjørn Forsman, Domen Kožar, Eelco Dolstra, Ezra
Cooper, Felipe Sateler, Jakub Wilk, James Le Cuirot, Karl Millar,
Linus Heckemann, Nathaniel J. Smith, Richard Purdie, Stanislav
Markevich and Tuomas Tynkkynen.

0.9 (February 29, 2016):

Lots of new features. Please refer to the Git commit log:

https://github.com/NixOS/patchelf/commits/master

This release has contributions from Aaron D. Marasco, Adrien
Devresse, Alexandre Pretyman, Changli Gao, Chingis Dugarzhapov,
darealshinji, David Sveningsson, Eelco Dolstra, Felipe Sateler,
Jeremy Sanders, Jonas Kuemmerlin, Thomas Tuegel, Tuomas Tynkkynen,
Vincent Danjean and Vladimír Čunát.

0.8 (January 15, 2014):

Fix a segfault caused by certain illegal entries in symbol tables.

0.7 (January 7, 2014):

Rewrite section indices in symbol tables. This for instance allows
gdb to show proper backtraces.
Added `–remove-needed’ option.

0.6 (November 7, 2011):

Hacky support for executables created by the Gold linker.
Support segments with an alignment of 0 (contributed by Zack
Weinberg).
Added a manual page (contributed by Jeremy Sanders
jeremy@jeremysanders.net).

0.5 (November 4, 2009):

Various bugfixes.
`–force-rpath’ now deletes the DT_RUNPATH if it is present.

0.4 (June 4, 2008):

Support for growing the RPATH on dynamic libraries.
IA-64 support (not tested) and related 64-bit fixes.
FreeBSD support.
--set-rpath', –shrink-rpath’ and --print-rpath' now prefer DT_RUNPATH over DT_RPATH, which is obsolete. When updating, if both are present, both are updated. If only DT_RPATH is present, it is converted to DT_RUNPATH unless –force-rpath’ is specified. If
neither is present, a DT_RUNPATH is added unless `–force-rpath’ is
specified, in which case a DT_RPATH is added.

0.3 (May 24, 2007):

Support for 64-bit ELF binaries (such as on x86_64-linux).
Support for big-endian ELF binaries (such as on powerpc-linux).
Various bugfixes.

0.2 (January 15, 2007):

Provides a hack to get certain programs (such as the
Belastingaangifte 2005) to work.

0.1 (October 11, 2005):

Initial release.

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patchelf: https://github.com/NixOS/patchelf