HP-UX Reference (11i v3 07/02) - 1 User Commands A-M (vol 1)

l
ld_ia(1)
Integrity Systems Only
ld_ia(1)
The text segment of a shared library is shared among all processes that use the library; each process using
the library receives its own copy of the data segment. If
pxdb -s on has been run on the executable
that loads the library, the text segment of a shared library is mapped privately for each process running the
executable.
ld recursively examines the dependencies of shared libraries used by a program that was
created by ld.Ifld does not find a supporting shared library at the path recorded in the dependency list
of a shared library, and if the dependency is the result of an
-l argument used when the shared library
was created,
ld searchs all the directories that it would search for a library that was specified with
-l (see
-L and LPATH).
Options
-a search Specify whether shared or archive libraries are searched with the
-l option. The
value of search should be one of
archive
, shared, archive_shared
,
shared_archive
,ordefault. This option can appear more than once, inter-
spersed among
-l options, to control the searching for each library. The default is to
use the shared version of a library if one is available, or the archive version if not.
If either archive or shared is active, only the specified library type is accepted.
If archive_shared is active, the archive form is preferred, but the shared form is
allowed.
If
shared_archive is active, the shared form is preferred but the archive form is
allowed.
To create a statically-bound program, use the
-noshared option rather than -a
archive
.
-b Create a shared library rather than a normal executable file. Object files processed
with this option must contain position-independent code (PIC), generated by
default by the compiler. See the discussion of position-independent code in cc(1),
aCC(1), f90(1), as(1), and Linker and Libraries Online User Guide.
-c filename Read ld options from a file. Each line contains zero or more arguments separated by
white space. Each line in the file, including the last line, must end with a newline
character. A # character implies that the rest of the line is a comment. To escape a
#
character, use the sequence ##.
-d Force definition of "common" symbols; that is, assign addresses and sizes, for
-r out-
put. This option also strips COMDAT information from the
-r output.
-dynamic This option is the default. Instructs the linker to produce a dynamically linked exe-
cutable (a program which can use shared libraries). This option is the complement of
-noshared.
If no shared libraries are linked in, the linker builds a dynamically linked executable.
However, in PA32-bit mode using the +compat option, if no shared libraries are
linked in, the linker builds a statically bound executable (or archive bound execut-
able).
For dynamically linked executables, the dynamic loader is involved in the process of
loading the executable, regardless of whether it was linked with shared libraries. For
-noshared (or statically bound) programs, control does not pass to the dynamic
loader. See dld.so(5) for more information.
-e epsym Set the default entry point address for the output file to be that of the symbol epsym.
(This option only applies to executable files.)
-h symbol Prior to writing the symbol table to the output file, mark this name as "local" so that it
is no longer externally visible. This ensures that this particular entry will not clash
with a definition in another file during future processing by ld. If used when building
a shared library or program, this option prevents the named symbol from being visible
to the dynamic loader.
You can specify more than one symbol on the command line with multiple option-
symbol pairs, that is, each symbol you specify must be preceded by the -h option.
-k filename Specify a mapfile that describes the output file memory map.
Please refer to HP-UX Linker and Libraries User’s Guide guide and the +node-
faultmap
for more information.
HP-UX 11i Version 3: February 2007 − 2 − Hewlett-Packard Company 519