Wei Hu <glegoo@xxxxxxxxx> writes: > We know that GCC has options that control optimization. What I tried > to do was to align functions with the -falign-functions option. > However I noticed that this option only controls the user code, > without affecting the library instructions. Correct. The option only affects compilation. It does not affect linking. > Although finally I modified linker script to fulfill my goal. I still > want to know how gcc handles the alignment options? > I guess it does so by passing some option to ld.. But why doesn't the > option affect the libraries? -falign-functions doesn't pass anything to ld. It just inserts .align pseudo-ops to cause each function being compiled to be aligned. Ian
