7.7.1.1 General

  • -mcall-prologues

    Functions prologues/epilogues are expanded as a call to appropriate subroutines. Code size will be smaller.

  • -mno-interrupts

    Change the stack pointer without disabling interrupts. Generated code is not compatible with hardware interrupts. Code size will be smaller.

  • -mno-tablejump

    Do not generate table jump instructions (removed from GCC 4.5.1 coz same as -fno-jump-tables).

  • -msize

    Output instruction sizes to the asm file (removed from avr-gcc coz same as using -dp switch which prints the instruction length).