Code Generation Command-Line Options

This chapter explains the following command-line options:

• -abi
  Chooses which ABI (Application Binary Interface) to conform to.
• -align
  Specifies structure and array alignment.
• -altivec_move_block
  Controls the use of Altivec instructions to optimize block moves.
• -big
  Generates object code and links an executable image to use big-endian data formats.
• -common
  Moves uninitialized data into a common section.
• -fatext
  Use eppc.o as the file name extension for object files.
• -fp
  Controls floating-point code generation.
• -fp_contract
  Generates fused multiply-addition instructions.
• -func_align
  Specifies alignment of functions in executable code.
• -gen-fsel
  Deprecated. Use -use_fsel instead.
• -little
  Generates object code and links an executable image to use little-endian data formats.
• -maf
  Controls the use of fused multiply-addition instructions.
• -ordered-fp-compares
  Controls the assumption of no unordered values in comparisons.
• -pool
  Controls the grouping of similar-sized data objects.
• -processor
  Generates and links object code for a specific processor.
• -profile
  Controls the appearance of calls to a profiler library at the entry and exit points of each function.
• -ppc_asm_to_vle
  Converts regular Power Architecture assembler mnemonics to equivalent VLE (Variable Length Encoded) assembler mnemonics in the inline assembler and standalone assembler.
• -rambuffer
  Specifies a runtime address in which to store the executable image in RAM so that it may be transferred to flash memory.
• -readonlystrings
  Places string constants in a read-only section.
• -relax_ieee
  Controls the use of relaxed IEEE floating point operations.
• -romaddr
  Generates a ROM image and specifies the image's starting address at runtime.
• -rostr
  Equivalent to the -readonlystrings option.
• -schedule
  Controls the rearrangement of instructions to reduce the effects of instruction latency.
• -spe_vector
  Enables the SPE vector support.
• -spe2_vector
  Enables the SPE2 vector support Syntax -spe2_
• -spe_addl_vector
  Enables the additional SPE fused multiply-add and multiply-subtract instuctions support.
• -strict_ieee
  Specifies the use of strict IEEE floating point operations.
• -use_lmw_stmw
  Controls the use of multiple load and store instructions for function prologues and epilogues.
• -use_fsel
  Controls the use of fsel instructions.
• -use_isel
  Controls the use of isel instructions.
• -vector
  Specifies AltiVec™ vector options.
• -vle
  Controls the use of the Variable Length Encoded (VLE) instruction set.