HP-UX Reference (11i v1 00/12) - 1 User Commands A-M (vol 1)
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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
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l
ld(1) ld(1)
O (o) Trap on floating-point overflow
U (u) Trap on floating-point underflow
I (i) Trap on floating-point operations that produce inexact results.
D (d) Enable sudden underflow (flush to zero) of denormalized values.
Note: Enabling sudden underflow is an undefined operation on PA-RISC
1.0-based systems, but it is defined on all subsequent versions of PA-RISC.
Selecting this flag enables sudden underflow only if it is available on the
processor being used at run-time.
To dynamically change these settings at run-time, see fesettrapenable(3M).
+I symbol Specify the name of the initializer function when building a shared library. A shared
library may have multiple initializers specified. Initializers are executed in the order
that they are specified. You can specify more than one initializer, but each must be
preceded by +I. For more details on the initializer function, refer to the +help
option or the HP-UX Linker and Libraries User’s Guide manual.
+O[no]fastaccess
Enable [disable] fast access to global data. The linker rearranges the data to further
reduce the number of ADDIL instructions in the executable.
This optimization may reveal some subtle programming errors related to assumptions
about data layout. This optimization can occur at optimization levels 2, 3 and 4. The
default is +Onofastaccess at optimization levels 2 and 3, and
+Ofastaccess
at optimization level 4.
Using the +Ofastaccess option in the presence of debug information generates a
warning message and can cause corruption of the debug information. Avoid using
+Ofastaccess with the -g option.
This option is accepted but ignored by the 64-bit ld.
+O[no]procelim
Enable [disable] the elimination of procedures that are not referenced by the applica-
tion. The default is +Onoprocelim . Procedure elimination can occur at any optim-
ization level, including level 0. For more details refer to the +help option or the
HP-UX Linker and Libraries User’s Guide manual. This option is incompatible with
the
+ild option.
+Oreusedir= dir
Specify the name of the directory to use as the reuse repository for the object code
reuse feature. This directory holds the compiled object files for reuse. dir can be an
absolute or relative path to directory where you invoked the linker. The
+Oreusedir option shortens link time by not recompiling intermediate object code
to object code when using +O4 or profile-based optimization.
+Oselectivepercent n
Instructs the interprocedural optimizer driver to pass the first n percent of the object
files to the high level optimizer for interprocedural optimizations such as inlining.
+Oselectivesize size
Instructs the interprocedural optimizer driver to pass the first k routines to the high
level optimizer for interprocedural optimization where the size of k routines are
approaching but less than size.
+OselectiveO3
Instructs the interprocedural optimizer driver to compile the routines not included in
the +O4 list to be compiled at +O3.
+Ostaticprediction
Meaningful only on PA 2.0 architecture, this option sets the branch prediction bit in
the output executable file’s auxiliary header.
32 Bit Link Editor Options
-A name This option specifies incremental loading. Linking is arranged so that the resulting
object can be read into an already executing program. The argument name specifies a
Section 1−−430 − 8 − HP-UX Release 11i: December 2000
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