3.18.8 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.
-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 and mulu 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 of turning 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) arrange (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 which set 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 variables 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.
-melf- Legacy no-op option only recognized with the cris-axis-elf and
cris-axis-linux-gnu targets.
-mlinux- Legacy no-op option only recognized with the cris-axis-linux-gnu target.
-sim- This option, recognized for the 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.