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LDD(1)                 DragonFly General Commands Manual                LDD(1)


ldd -- list dynamic object dependencies


ldd [-a] [-v] [-f format] program ...


The ldd utility displays all shared objects that are needed to run the given program or to load the given shared object. Contrary to nm(1), the list includes ``indirect'' dependencies that are the result of needed shared objects which themselves depend on yet other shared objects. Zero, one or two -f options may be given. The argument is a format string passed to rtld(1) and allows customization of ldd's output. If one is given, it sets LD_TRACE_LOADED_OBJECTS_FMT1. If two are given, they set LD_TRACE_LOADED_OBJECTS_FMT1 and LD_TRACE_LOADED_OBJECTS_FMT2, respectively. See rtld(1) for details, including a list of recognized conversion characters. The -a option displays the list of all objects that are needed by each loaded object. The -v option is left for compatibility and has no effect.


The following is an example of a shell pipeline which uses the -f option. It will print a report of all ELF binaries in the current directory, which link against libc.so.6: find . -type f | xargs -n1 file -F ' ' | grep ELF | cut -f1 -d' ' | xargs ldd -f '%A %o\n' | grep libc.so.6


ld(1), nm(1), rtld(1)


A ldd utility first appeared in SunOS 4.0, it appeared in its current form in FreeBSD 1.1. DragonFly 4.3 February 28, 2016 DragonFly 4.3

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