QiangHuang <qianghuang87@xxxxxxxxx> writes: > GCC now has two styles for compilation, one for > 'function-at-atime', and the other for 'unit-at-a-time'. > The term 'unit' in this word refers to a whole source file ? or > something else. > > Could someone make an exact definition about it? > And How the compiler make the decision that if the functions are > in the same compilation unit. "unit" refers to a single compilation unit, meaning everything that the compiler sees in a single invocation. The decision is made by the command line options. However, note that as of gcc 4.4 (not yet released) the compiler only supports unit-at-a-time mode. function-at-a-time mode has been eliminated. Ian
