3.17.5 CRIS Options
These options are defined specifically for the CRIS ports.
-
-march=
architecture-type -
-mcpu=
architecture-type -
Generate code for the specified architecture. The choices for architecture-type are `
v3
', `
v8
' and `
v10
' for respectively ETRAX 4, ETRAX 100, and ETRAX 100 LX. Default is `
v0
' except for cris-axis-linux-gnu, where the default is `
v10
'.
-
-mtune=
architecture-type -
Tune to architecture-type everything applicable about the generated code, except for the ABI and the set of available instructions. The choices for architecture-type are the same as for
-march=
architecture-type
.
-
-mmax-stack-frame=
n -
Warn when the stack frame of a function exceeds n bytes.
-
-melinux-stacksize=
n -
Only available with the `
cris-axis-aout
' target. Arranges for indications in the program to the kernel loader that the stack of the program should be set to n bytes.
-
-metrax4
-
-metrax100
-
The options
-metrax4
and
-metrax100
are synonyms for
-march=v3
and
-march=v8
respectively.
-
-mmul-bug-workaround
-
-mno-mul-bug-workaround
-
Work around a bug in the
muls
andmulu
instructions for CPU models where it applies. This option is active by default.
-
-mpdebug
-
Enable CRIS-specific verbose debug-related information in the assembly code. This option also has the effect to turn off the `
#NO_APP
' formatted-code indicator to the assembler at the beginning of the assembly file.
-
-mcc-init
-
Do not use condition-code results from previous instruction; always emit compare and test instructions before use of condition codes.
-
-mno-side-effects
-
Do not emit instructions with side-effects in addressing modes other than post-increment.
-
-mstack-align
-
-mno-stack-align
-
-mdata-align
-
-mno-data-align
-
-mconst-align
-
-mno-const-align
-
These options (no-options) arranges (eliminate arrangements) for the stack-frame, individual data and constants to be aligned for the maximum single data access size for the chosen CPU model. The default is to arrange for 32-bit alignment. ABI details such as structure layout are not affected by these options.
-
-m32-bit
-
-m16-bit
-
-m8-bit
-
Similar to the stack- data- and const-align options above, these options arrange for stack-frame, writable data and constants to all be 32-bit, 16-bit or 8-bit aligned. The default is 32-bit alignment.
-
-mno-prologue-epilogue
-
-mprologue-epilogue
-
With
-mno-prologue-epilogue
, the normal function prologue and epilogue that sets up the stack-frame are omitted and no return instructions or return sequences are generated in the code. Use this option only together with visual inspection of the compiled code: no warnings or errors are generated when call-saved registers must be saved, or storage for local variable needs to be allocated.
-
-mno-gotplt
-
-mgotplt
-
With
-fpic
and
-fPIC
, don't generate (do generate) instruction sequences that load addresses for functions from the PLT part of the GOT rather than (traditional on other architectures) calls to the PLT. The default is
-mgotplt
.
-
-maout
-
Legacy no-op option only recognized with the cris-axis-aout target.
-
-melf
-
Legacy no-op option only recognized with the cris-axis-elf and cris-axis-linux-gnu targets.
-
-melinux
-
Only recognized with the cris-axis-aout target, where it selects a GNU/linux-like multilib, include files and instruction set for
-march=v8
.
-
-mlinux
-
Legacy no-op option only recognized with the cris-axis-linux-gnu target.
-
-sim
-
This option, recognized for the cris-axis-aout and cris-axis-elf arranges to link with input-output functions from a simulator library. Code, initialized data and zero-initialized data are allocated consecutively.
-
-sim2
- Like -sim , but pass linker options to locate initialized data at 0x40000000 and zero-initialized data at 0x80000000.