You can try gcc -v test.c and you will see all default macros defined by the compiler. Wei On Fri, 4 Oct 2002, Raghuveer Aravindan wrote: > Hi all, > > Does anybody know if the compiler will define the sun tag on a Solaris on > x86 ? > ie will #ifdef sun > a=10 > #endif > > define a ? > > Thanks > > -Aravind > >