Thanks, but this is not working. The GNU assembler manpages do not indicate that 'as' knows this option. Which version are you using? My gcc versions and assembler versions are: gcc version 3.4.4 20050721 (Red Hat 3.4.4-2) GNU assembler version 2.15.92.0.2 (i386-redhat-linux) using BFD version 2.15.92.0.2 20040927 On Friday 24 November 2006 17:44, Andrew Haley wrote: > Artur Krzysztof Szostak writes: > > Is there a way to make GCC output the source code comments or > > corresponding c++ source code that generated a set of assembler > > instructions in the .s files? > > Yes. > > -Wa,-adhls > > Andrew. -- Artur Szostak Tel. +27 21 650 3356 Mobile: +27 82 297 9502 Emails: artur@xxxxxxxxxxxxxxxxxxx artursz@xxxxxxxxxxx AIM: artiblot Skype: artiblot Room: 4T6 Address: R.W. James Building, Rondebosch, 7701 Cape Town, South Africa Physics Department University of Cape Town