Messages in this thread | | | Date | Fri, 25 May 2007 17:10:15 -0400 (EDT) | From | "Robert P. J. Day" <> | Subject | Re: [PATCH] MIPS: Transform old-style macros to newer "__noreturn" standard. |
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On Fri, 25 May 2007, H. Peter Anvin wrote:
> Robert P. J. Day wrote: > > > > > > f() __attribute__((noreturn)) ; > > > > you get: > > > > warning: data definition has no type or storage class > > > > but gcc doesn't complain if you declare it thusly: > > > > __attribute__((noreturn)) f() ; > > > > that strikes me as a flaw in gcc, no? > > > > Doesn't matter. gcc accepts "void __attribute__((noreturn)) f();", and > thus, one can define: > > #define __noreturn void __attribute__((noreturn)) > > ... and declare functions as: > > __noreturn f(); > > ... which is the syntactially sane way of doing it.
that may be, but keep in mind that gcc allows attributes to *follow* the parameter list as well, and some people might prefer to do the following:
f() __noreturn;
that would fail badly if you defined __noreturn as you suggest.
is there, in fact, a tradition for attribute usage, along the lines of what satyam suggested earlier? because once there's an established standard, that's going to dictate what is and isn't possible in terms of macros and shortcuts.
rday -- ======================================================================== Robert P. J. Day Linux Consulting, Training and Annoying Kernel Pedantry Waterloo, Ontario, CANADA
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