On 06/20/2011 12:59 PM, Chuck Swiger wrote:
On Jun 20, 2011, at 9:35 AM, Stephen Montgomery-Smith wrote:
What I would like is a primer on how to suppress all the warnings and errors
created by K&R code.
OK:
http://clang.llvm.org/docs/UsersManual.html#cl_diagnostics
Yes, I did see that.
Of course, you can only suppress warnings; you cannot suppress actual errors.
clang doesn't currently support -traditional aka pure K&R C. It's possible
that compiling with -ansi aka -std=c89 might help-- at least you should get
-Wno-implicit-function-declaration and maybe -Wno-implicit-int.
Also, why is this an error:
error: non-void function 'top_button_cross' should return a value
[-Wreturn-type]
when most everything else is a warning. (See
http://pointyhat.freebsd.org/errorlogs/amd64-errorlogs/e.9-exp.20110616185105/xppaut-5.99.log.)
top_button_cross() probably should be declared as returning void. What's
presumably happening is that it gets a default return type of int since it
doesn't otherwise specify a return type, and then fails to have an explicit
return, which is an error.
Is a return with no value, from a function of type int, meant to be an
error in K&R code?
If so, I will change the code so that "return" becomes "return 0".
Otherwise, I think the clang compiler should be changed so that this is
a warning, not an error. Or at least an error that can be switched off
with -Wno-return-type.
I will say that I have no desire to put ansii patches into working K&R code.
Stephen
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