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These options are defined specifically for the CRIS ports.
-march=architecture-type ¶-mcpu=architecture-typeGenerate code for the specified architecture. The choices forarchitecture-type are ‘v3’, ‘v8’ and ‘v10’ forrespectively ETRAX 4, ETRAX 100, and ETRAX 100 LX.Default is ‘v0’.
-mtune=architecture-type ¶Tune toarchitecture-type everything applicable about the generatedcode, except for the ABI and the set of available instructions. Thechoices forarchitecture-type are the same as for-march=architecture-type.
-mmax-stackframe=n ¶Warn when the stack frame of a function exceedsn bytes.
-metrax4 ¶-metrax100The options-metrax4 and-metrax100 are synonyms for-march=v3 and-march=v8 respectively.
-mmul-bug-workaround ¶-mno-mul-bug-workaroundWork around a bug in themuls andmulu instructions for CPUmodels where it applies. This option is disabled by default.
-mpdebug ¶Enable CRIS-specific verbose debug-related information in the assemblycode. This option also has the effect of turning off the ‘#NO_APP’formatted-code indicator to the assembler at the beginning of theassembly file.
-mcc-init ¶Do not use condition-code results from previous instruction; always emitcompare and test instructions before use of condition codes.
-mno-side-effects ¶Do not emit instructions with side effects in addressing modes other thanpost-increment.
-mstack-align ¶-mno-stack-align-mdata-align-mno-data-align-mconst-align-mno-const-alignThese options (‘no-’ options) arrange (eliminate arrangements) for thestack frame, individual data and constants to be aligned for the maximumsingle data access size for the chosen CPU model. The default is toarrange for 32-bit alignment. ABI details such as structure layout arenot affected by these options.
-m32-bit ¶-m16-bit-m8-bitSimilar to the stack- data- and const-align options above, these optionsarrange 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-epilogueWith-mno-prologue-epilogue, the normal function prologue andepilogue which set up the stack frame are omitted and no returninstructions or return sequences are generated in the code. Use thisoption only together with visual inspection of the compiled code: nowarnings or errors are generated when call-saved registers must be saved,or storage for local variables needs to be allocated.
-mbest-lib-options ¶-moverride-best-lib-options-mbest-lib-options selects the most feature-enabling optionsallowed by other options. This option has no ‘no-’ form, but-moverride-best-lib-options disables it regardless of the relativeorder of the two options on the command line.
-mtrap-using-break8 ¶Emit traps as ‘break 8’. This is the default for CRIS v3 and up. Ifdisabled, calls toabort are used instead.
-mtrap-unaligned-atomic ¶Emit checks causing ‘break 8’ instructions to execute whenapplying atomic builtins on misaligned memory.
-munaligned-atomic-may-use-library ¶Handle atomic builtins that may be applied to unaligned data by callinglibrary functions. This option overrides-mtrap-unaligned-atomic.
-sim ¶This option arrangesto 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 at0x40000000 and zero-initialized data at 0x80000000.
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