GNU Info

(as.info)CRIS-Opts

---

Next: CRIS-Expand Up: CRIS-Dependent

---

Enter node , (file) or (file)node

Command-line Options
--------------------

   The CRIS version of `as' has these machine-dependent command-line
options.

   The format of the generated object files can be either ELF or a.out,
specified by the command-line options `--emulation=crisaout' and
`--emulation=criself'.  The default is ELF (criself), unless `as' has
been configured specifically for a.out by using the configuration name
`cris-axis-aout'.

   There are two different link-incompatible ELF object file variants
for CRIS, for use in environments where symbols are expected to be
prefixed by a leading `_' character and for environments without such a
symbol prefix.  The variant used for GNU/Linux port has no symbol
prefix.  Which variant to produce is specified by either of the options
`--underscore' and `--no-underscore'.  The default is `--underscore'.
Since symbols in CRIS a.out objects are expected to have a `_' prefix,
specifying `--no-underscore' when generating a.out objects is an error.
Besides the object format difference, the effect of this option is to
parse register names differently (Note: crisnous).  The
`--no-underscore' option makes a `$' register prefix mandatory.

   The option `--pic' must be passed to `as' in order to recognize the
symbol syntax used for ELF (SVR4 PIC) position-independent-code (Note:
crispic).  This will also affect expansion of instructions.  The
expansion with `--pic' will use PC-relative rather than (slightly
faster) absolute addresses in those expansions.

   When `-N' is specified, `as' will emit a warning when a 16-bit
branch instruction is expanded into a 32-bit multiple-instruction
construct (Note: CRIS-Expand).