LD(1)
NAME
ld − link editor
USAGE
ld [ −r ] [ −d ] [ −o name ] file ... [ −l [x] ]
DESCRIPTION
Ld combines several object programs into one, resolves external references, and searches libraries usually created by ar (1). It can also be used on libraries created by LBR (the DOMAIN librarian) and object modules produced by the DOMAIN BIND program. When you specify several object files, ld combines them, producing an object module which can either be executed or become the input for a further ld run. If the module is to be used as input, you should supply the −r option to preserve the relocation bits. The output of ld is left on an a.out file.
Ld concatenates the argument routines in the order specified. If any argument is a library, ld searches it exactly once at the point encountered in the argument list. Only those routines defining an unresolved external reference are loaded. The order of programs within libraries is unimportant.
In the DOMAIN/IX environment, the symbols _etext, _edata, and _end (etext, edata, and end in C) are not defined. If the −T option is not given, an attempt to load several different modules with different systypes produces an error.
OPTIONS
Except for −l, each of the options used should appear before filenames. Note that the −d, −s, −x, −X, −n, and −i options are unsupported; ld ignores them if they are used. Also note that the −u, −m, −t, and −V options are unsupported, and their use produces an error.
−l[x] Search the /usr/lib/libc.a library, which is the standard system library for C programs. With an x, as in −lx, search /usr/lib/libx.a, where x is a string. Searching is done when the library’s name is encountered, so the placement of a −l is significant.
−r Do not complain about undefined symbols.
−d Force definition of common storage even if the −r option is present.
−o name Use name as the name of the ld output file, instead of a.out.
−T systype Override the systype for which the input modules were compiled, and stamp the output module with the given systype. Use of this option changes the runtime semantics of the system calls and may cause the modules not to work. Its use is discouraged.
FILES
/usr/lib/lib?.a libraries
a.out output file