• Remove string duplication (search binary with string utility to find out how much space you can save)
• Use integer error codes rather than showing error strings
• Literal pool usage reduction
  • e.g. when going from ARM to Thumb
  • group globals into structures
• .sinit usage (construct instead simple global structs)
• selectively enable optimization for some files
• refactoring duplicate code
• reduce usage of standard library functions

assertions

#define ASSERT(expr) \
if (expr)            \
    {}               \
else                 \
    aFailed(F_NUM, __LINE__) 
      
trap()
{
    #ifndef NDEBUG
    #define _BKPT __ASM(“bkpt 0″)
    while(1);
    #endif
}