"James A. Morrison" <ja2morri at csclub.uwaterloo.ca> writes: On Wed, 2003-10-22 at 18:22, Torbjorn Granlund wrote: > I repeat: > > Can you compile helloworld.c and run it with both -m32 and -m64? yes And the former is an ELF32 binary and the latter is an ELF64 binary (as determined by "file a.out")? The default is to generate ELF32 with your gcc? -- Torbjörn