Hi Robin, On Thu, Oct 13, 2022 at 03:41:25PM +0200, Robin Jarry wrote: > Some environments (buildroot) do not have the ldd utility installed by > default. However, ldd is often only a wrapper shell script that actually > checks that the arguments are valid ELF files and executes them with > the LD_TRACE_LOADED_OBJECTS=1 variable set in the environment. > > Since ld.so is the actual ELF interpreter which is loaded first when > executing a program, executing any dynamic ELF program/library with that > variable set will cause all dependent dynamic libraries to be printed > and ld.so will exit before even running main. > > Excerpt from ld.so(7) man page: > > LD_TRACE_LOADED_OBJECTS > If set (to any value), causes the program to list its dynamic > dependencies, as if run by ldd(1), instead of running normally. > > Change dpdk-pmdinfo.py to actually "execute" the files provided on the > command line with LD_TRACE_LOADED_OBJECTS=1 set. Ensure that the files > are valid dynamically executable ELF programs to avoid obscure and > confusing errors. > > Reported-by: Olivier Matz <olivier.m...@6wind.com> > Signed-off-by: Robin Jarry <rja...@redhat.com>
Tested on buildroot without ldd. Reviewed-by: Olivier Matz <olivier.m...@6wind.com>
