NAME

       patchelf - Modify ELF files

SYNOPSIS

       patchelf OPTION FILE ...

DESCRIPTION

       PatchELF is a simple utility for modifying existing ELF executables and libraries.  It can
       change the dynamic loader ("ELF interpreter") of  executables  and  change  the  RPATH  of
       executables and libraries.

OPTIONS

       The single option given operates on each FILE, editing in place.

       Any  option  taking  a string argument can also take a file by prefixing the argument with
       the @ symbol. See EXAMPLES

       --page-size SIZE
              Uses the given page size instead of the default.

       --set-interpreter INTERPRETER
              Change the dynamic loader ("ELF interpreter") of executable given to INTERPRETER.

       --print-interpreter
              Prints the ELF interpreter of the executable.

       --print-soname
              Prints DT_SONAME entry of .dynamic section.  Raises an error if  DT_SONAME  doesn't
              exist.

       --set-soname SONAME
              Sets DT_SONAME entry of a library to SONAME.

       --set-rpath RUNPATH
              Change the DT_RUNPATH of the executable or library to RUNPATH.

       --add-rpath RUNPATH
              Add RUNPATH to the existing DT_RUNPATH of the executable or library.

       --remove-rpath
              Removes the DT_RPATH or DT_RUNPATH entry of the executable or library.

       --shrink-rpath
              Remove  from  the  DT_RUNPATH  or  DT_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".

       --allowed-rpath-prefixes PREFIXES
              Combined with the "--shrink-rpath" option, this  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.

       --print-rpath
              Prints the DT_RUNPATH or DT_RPATH for an executable or library.

       --force-rpath
              Forces  the  use  of  the  obsolete  DT_RPATH in the file instead of DT_RUNPATH. By
              default DT_RPATH is converted to DT_RUNPATH.

       --add-needed LIBRARY
              Adds a declared dependency on a dynamic library (DT_NEEDED).  This  option  can  be
              given multiple times.

       --replace-needed LIB_ORIG LIB_NEW
              Replaces  a  declared dependency on a dynamic library with another one (DT_NEEDED).
              This option can be given multiple times.

       --remove-needed LIBRARY
              Removes a declared dependency on LIBRARY (DT_NEEDED  entry).  This  option  can  be
              given multiple times.

       --no-default-lib
              Marks the object so that the search for dependencies of this object will ignore any
              default library search paths.

       --output FILE
              Set the output file name.  If not specified, the input will be modified in place.

       --debug
              Prints details of the changes made to the input file.

       --version
              Shows the version of patchelf.

EXAMPLES

       To use the contents on an external file as a parameter:

              $ patchelf a.out --add-rpath @/tmp/generated-rpath.bin

       To change the RPATH of a binary. Note that $ORIGIN is a special symbol used by the loader,
       so must be quoted.

              patchelf --set-rpath '$ORIGIN/../lib64' a.out

AUTHOR

       Eelco Dolstra <e.dolstra@tudelft.nl>

SEE ALSO

       elf(5), ld.so(8)