Thorsten Glaser <[EMAIL PROTECTED]> writes: > Paul Eggert dixit: > >> […] gcc -O2 makes no promises without >> -fwrapv. > > gcc -O1 -fwrapv even doesn't work correctly for gcc3, > and gcc2 and gcc <3.3(?) don't even have -fwrapv: > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30477
The latter would not be a problem, since Autoconf would try -fwrapv on a test module before using it to compile a real module. Do you have a test case illustrating the gcc3 bug? If so, perhaps Autoconf could include that in its test of -fwrapv.
