On Wed, 2009-04-29 at 03:18 -0700, John Farmer wrote: > Hi Richard, > > I have downloaded the docs and am having a browse now, thanks. > > I did export the projects build file and searched it for "abi" but only > found "-mfloat-abi=soft" which specifies an ABI for floating point values. > There is a GCC option "-mabi=name" but that does not appear anywhere in my > command lines. Given that the -mabi option is not present presumably I am > using a default ABI, but what is it? > The short answer is that it depends on your compiler's configuration; if you used arm-none-eabi (which is what I would recommend for bare-metal use on a CPU like Cortex-m3), then it will be based on the new ABI. > Is there a way to get GCC to display all of its default options that it uses > when for example certain comman line options are not specified? The only information that is printed comes out with --help (you'll get more detailed help if you also specify a source file of the language you want help for), or what you can find in the manual. R.
