Another thing to notice that nested functions require executable stack. This is also another reason to get rid of them. <div class="gmail_quote">On Wed, Nov 9, 2011 at 3:11 PM, İsmail Dönmez <<a href="mailto:ismail@namtrac.org">ismail@namtrac.org</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hi; nouveau_array.c seems to be using nested functions which is not supported by clang (or the EDG based compilers it seems), the reduced testcase looks like this: foo() { auto void f(); void f() {}; } I talked to the clang developers and they don't plan to support this GNU extension since (they say) it would be too hard to support it in the parser. Clang website notes the following about this issue (from <a href="http://clang.llvm.org/docs/UsersManual.html#c_unimpl_gcc" target="_blank">http://clang.llvm.org/docs/UsersManual.html#c_unimpl_gcc</a> ) <quote> clang does not support nested functions; this is a complex feature which is infrequently used, so it is unlikely to be implemented anytime soon. </quote> Is there any chance of removing such code from Mesa? Regards, ismail </blockquote></div>