Eld Overview - HP eld Manual

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Introduction to eld
This section contains the following information topics:

eld Overview

Native Object Files
The Linker Command Stream
parameters and filenames) on the command line.
Example of Use
DLL.
eld Overview
The primary use of the linker
OSS or PC), is to combine one or more TNS/E position-independent code (PIC) object
files into a new single loadfile.
manipulates both code and data, and then places all of the loadfile's adjustable
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references in tables outside the code to make them available to rld, the run-time
loader. This process, called linking, must be applied to linkfiles after they have been
compiled and before they can be loaded for execution.
Linkfiles are produced by a TNS/E compiler or assembler. The new loadfile created by
is either a program or a DLL. A loadfile contains certain information used to bind
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references among loadfiles at load time. The linker may also look at other DLLs in
order to resolve references to them at link time (this is called "presetting"). A main
program, together with the DLLs that it needs directly or indirectly, is executed on the
HP NonStop operating system. A file type of 800 indicates that the code can only
execute on the TNS/E HP NonStop operating system platform.
The equivalent product for TNS/R PIC object files is known as ld and is documented
in the ld Manual.
rld is the run-time loader that may be used in either TNS/R or TNS/E environments.
rld is documented in the rld Manual.
As Guardian commands are case-insensitive you may use either upper (for example,
) or lower-case (for example,
ELD
UNIX conventions of lower-case usage, you may only use lowercase in the OSS
environment. This manual mostly uses lower-case versions of the linker names.
PIC native object files are generated by the native C, native C++, native COBOL, and
pTAL compilers. See the following manuals for information about these compilers:
•
C/C++ Programmer's Guide
•
HP COBOL For NonStop Systems
•
pTAL Reference Manual.
introduces the general functionality of the product.
introduces the different types of object files.
shows the conventions for entering tokens (options,
presents an example of using
, in the TNS/E development environments (Guardian,
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to link a main program and one
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) commands to invoke the linker. To comply with
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