How to change avr-gcc settings?

Hi,

I’m trying to change some avr-gcc options without success. Changing and copying the makefile has no effect.
I took a look at the arduino IDE source. It looks like the compiler settings are “hard-coded”:

static private List getCommandCompilerC(String avrBasePath, List includePaths,
    String sourceName, String objectName) {
    List baseCommandCompiler = new ArrayList(Arrays.asList(new String[] {
      avrBasePath + "avr-gcc",
      "-c", // compile, don't link
      "-g", // include debugging info (so errors include line numbers)
      "-Os", // optimize for size
      "-w", // surpress all warnings
      "-ffunction-sections", // place each function in its own section
      "-fdata-sections",
      "-mmcu=" + Preferences.get("boards." + Preferences.get("board") + ".build.mcu"),
      "-DF_CPU=" + Preferences.get("boards." + Preferences.get("board") + ".build.f_cpu"),
    }));

So how can I change compiler options, e.g. -Os → -O2; without changing the IDE source code? Are there any tricks I have missed?

Best regards,
marleaux

The makefile is not used by the IDE.

AFAIK the only way to change the settings is by editing the IDE source and recompiling the IDE.

--Phil.