On Wed, Jun 6, 2018 at 6:35 AM, Ravi Pokala <[email protected]> wrote:
> Hi Mateusz, > > -----Original Message----- > From: <[email protected]> on behalf of Mateusz Guzik > <[email protected]> > Date: 2018-06-06, Wednesday at 01:08 > To: <[email protected]>, <[email protected]>, < > [email protected]> > Subject: svn commit: r334702 - head/sys/sys > > > ... > > #ifdef _KERNEL > > #define malloc(size, type, flags) ({ > \ > > Now that I'm taking another look at this, I'm confused as to why the > entire macro expansion is inside parentheses? (The braces make sense, since > this is a block with local variables which need to be contained.) > This is a gcc (and clang) extension to allow the macro body to be a code block -- standard C gets unhappy with just the curly braces. https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html is a maybe-relevant page that google found me. -Ben _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "[email protected]"
