"Bruce Sutherland" <bruce.sutherland@xxxxxxxxxxxxxxxxxxxx> writes: > In the documentation, the command line optionoverview > (http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Option-Summary.html#Option-Summ > ary) shows a command line option for ARM: -mapcs-stack-check. > > However, in the detailed documentation for the ARM options > (http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/ARM-Options.html#ARM-Options), > I cannot find a description for this option. > > Does this option actually exist, and how does it work? I found an old post > to the bugs mailing list where a Richard Earnshaw stated that the option was > recognised by gcc, but does not work. It was suggested that the option be > removed from the documentation until it was implemented. I have compiled my > code with it enabled using gcc 4.2.1, and it adds a few bytes to the size of > my binary. The option does exist, and it is undocumented. It doesn't seem to do anything particularly useful. It certainly doesn't do any sort of stack checking. I haven't looked into the history of why it was introduced. Ian
