Yes it is in the assembler I should have mentioned it, is their a separate mailing list for that? I need a way to conditionally add ".arch_extension sec" based on some environment preprocessor flag. Currently I am currently doing something like this: #if __GNUC__ >= 4 && __GNUC_MINOR__ >= 6 .arch_extension sec #endif Which I know isn't completely what I want. Thanks. On Wed, Jul 25, 2012 at 4:31 PM, Ian Lance Taylor <iant@xxxxxxxxxx> wrote: > On Wed, Jul 25, 2012 at 2:35 PM, William Roberts > <bill.c.roberts@xxxxxxxxx> wrote: >> I am trying to track down what version of GCC started supporting >> .arch_extension sec. >> >> I know 4.4.0 did not and 4.6 does. > > The only .arch_extension I know of is not part of GCC at all. It is a > pseudoop supported by the GNU ARM assembler. It first appeared in GNU > binutils 2.21. > > Ian -- Respectfully, William C Roberts