ldd_pa(1)

NAME

ldd_pa: ldd — list dynamic dependencies of executable files or shared libraries on PA-RISC systems

SYNOPSIS

ldd [-b] [-d] [-r] [-s] [-v] filename...

Remarks

This manpage describes ldd on PA-RISC systems. For ldd on Integrity systems, see ldd_ia(1).

DESCRIPTION

ldd is a command that can list the dynamic dependencies of incomplete executable files or shared libraries.

ldd lists verbose information about dynamic dependencies and symbol references. If the object file is an executable file, ldd lists all shared libraries that would be loaded as a result of executing the file. If it is a shared library, ldd lists all shared libraries that would be loaded as a result of loading the library.

ldd uses the same algorithm as the dynamic loader (/usr/lib/dld.sl and /usr/lib/pa20_64/dld.sl) to locate the shared libraries. See PA-RISC 32-bit Dynamic Path List, PA-RISC 64-bit Dynamic Path List, and The LD_PRELOAD Environment Variable sections in dld.sl(5) for more information.

Options

ldd recognizes the following options:

-b: PA-RISC 32-bit only. Used in conjunction with -d and/or -r to force dld.sl to bind all dependent libraries and report unsats. By default the smartbind mechanism in dld.sl only binds libraries whose symbols are explicitly referenced.
-d: Check reference to data symbols.
-r: Check reference to data and code symbols.
-s: Display the search path used to locate the shared libraries.
-v: Display all dependency relationships.

EXTERNAL INFLUENCES

Environment Variables

ldd uses the following environment variables to locate shared libraries.

LD_LIBRARY_PATH: PA-RISC 64-bit mode: A colon-separated list of path names which defines the search path for shared libraries at runtime. See PA-RISC 64-bit Dynamic Path List in dld.sl(5) for more information.
LD_PRELOAD: A colon-separated or space-separated list of libraries which the dynamic loader implicitly loads first at runtime. See The LD_PRELOAD Environment Variable in dld.sl(5) for more information.
SHLIB_PATH: A colon-separated list of path names which defines the search path for shared libraries at runtime. See PA-RISC 32-bit Dynamic Path List and PA-RISC 64-bit Dynamic Path List in dld.sl(5) for more information.

The following internationalization variables affect the execution of ldd:

LANG: Determines the locale category for native language, local customs and coded character set in the absence of LC_ALL and other LC_* environment variables. If LANG is not specified or is set to the empty string, a default of C (see lang(5)) is used instead of LANG.
LC_ALL: Determines the values for all locale categories and has precedence over LANG and other LC_* environment variables.
LC_MESSAGES: Determines the locale that should be used to affect the format and contents of diagnostic messages written to standard error.
LC_NUMERIC: Determines the locale category for numeric formatting.
LC_CTYPE: Determines the locale category for character handling functions.
NLSPATH: Determines the location of message catalogs for the processing of LC_MESSAGES.

If any internationalization variable contains an invalid setting, ldd behaves as if all internationalization variables are set to C. See environ(5).

DIAGNOSTICS

ldd prints the record of shared library path names to stdout. The optional list of symbol resolution problems are printed to stderr.

ldd returns zero when the operation is successful. A non-zero return code indicates that an error occurred.

EXAMPLES

By default ldd prints a simple dynamic path information. This consists of the dependencies recorded in the executable (or the shared library) followed by the physical location where these libraries are found.

$ ldd a.out
    ./libx.sl =>    ./libx.sl 
    libc.2 =>       /lib/pa20_64/libc.2 
    libdl.1 =>      /lib/pa20_64/libdl.1 

The -v option causes ldd to print dependency relationship along with the dynamic path information.

$ ldd -v a.out
  find library=./libx.sl; required by a.out 
    ./libx.sl =>    ./libx.sl 
  find library=libc.2; required by a.out 
    libc.2 =>       /lib/pa20_64/libc.2 
  find library=libdl.1; required by /lib/pa20_64/libc.2 
    libdl.1 =>      /lib/pa20_64/libdl.1 

The -r option causes ldd to analyze all symbol references and print information about unsatisfied code and data symbols.

$ ldd -r a.out
    ./libx.sl =>    ./libx.sl 
    libc.2 =>       /lib/pa20_64/libc.2 
    libdl.1 =>      /lib/pa20_64/libdl.1 
    symbol not found: val1 (./libx.sl) 
    symbol not found: count (./libx.sl) 
    symbol not found: func1 (./libx.sl) 

The -s option causes ldd to print the dynamic search path lists used to load the libraries in the order that the path lists are referenced:

$ export SHLIB_PATH=/tmp
$ export LD_LIBRARY_PATH=/var/tmp:/var/adm
$ ldd -s a.out

find library=./libx.sl; required by a.out 
      ./libx.sl =>    ./libx.sl 

find library=libc.2; required by a.out 
  search path=/var/tmp:/var/adm  (LD_LIBRARY_PATH) 
  trying path=/var/tmp/libc.2 
  trying path=/var/adm/libc.2 
  search path=/tmp  (SHLIB_PATH) 
  trying path=/tmp/libc.2 
  search path=/usr/lib/pa20_64:/opt/langtools/lib/pa20_64:  (RPATH) 
  trying path=/usr/lib/pa20_64/libc.2 
      libc.2 =>       /usr/lib/pa20_64/libc.2 

find library=libdl.1; required by /usr/lib/pa20_64/libc.2 
  search path=/var/tmp:/var/adm  (LD_LIBRARY_PATH) 
  trying path=/var/tmp/libdl.1 
  trying path=/var/adm/libdl.1 
  search path=/tmp  (SHLIB_PATH ) 
  trying path=/tmp/libdl.1 
  search path=/usr/lib/pa20_64  (RPATH) 
  trying path=/usr/lib/pa20_64/libdl.1 
      libdl.1 =>      /usr/lib/pa20_64/libdl.1 

WARNINGS

ldd does not list shared libraries explicitly loaded using dlopen(3C) or shl_load(3X).

FILES

a.out: output file
/usr/lib/dld.sl: 32-bit PA-RISC dynamic loader
/usr/lib/pa20_64/dld.sl: 64-bit PA-RISC dynamic loader
/usr/ccs/lib/lddstub: 32-bit dummy executable loaded to check the dependencies of shared libraries.
/usr/ccs/lib/pa20_64/lddstub: 64-bit dummy executable loaded to check the dependencies of shared libraries.
/usr/lib/nls/$LANG/ldd.cat: message catalog

ldd_pa(1)

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