auto configuration and full function prototypes

[Jeff Trawick <tr...@bellsouth.net>]

Can we assume that proper function prototypes (i.e., with argument
declarations) are available (and used) in system header files?  

In some cases (e.g., sigwait()), there are a couple of flavors which
can be readily identified from the number of arguments.

It is pretty simple to try to compile something like this

  #include <signal.h>

  void main(void)
  {
    sigset_t set;
    sigwait(&set);
  }

and set SIGWAIT_HAS_ONE_ARG (or some such) if it successfully
compiles, but if the declaration used from signal.h is "int sigwait()"
then configuration is broken on that platform.

Any better ideas?

Thanks...
-- 
Jeff Trawick | trawick@ibm.net | PGP public key at web site:
     http://www.geocities.com/SiliconValley/Park/9289/
          Born in Roswell... married an alien...

Re: auto configuration and full function prototypes

[Jeff Trawick <tr...@bellsouth.net>]

Greg Ames had the idea that I could first do a test to see if
prototypes are broken, and if prototypes are broken then don't do any
tests which depend on good prototypes.

test for broken prototypes (and/or some compiler setting that allows
the compile to succeed when an incorrect argument list is provided):

  #include <string.h>

  void main(void)
  {
    char buf[1];

    strcpy(buf,buf,buf,buf,buf,buf);
  }

If it compiles, set ARG_CHECKING_IS_BROKEN.

In subsequent tests that don't work properly with broken system
prototypes, make sure the compile will work when
ARG_CHECKING_IS_BROKEN is defined.

-- 
Jeff Trawick | trawick@ibm.net | PGP public key at web site:
     http://www.geocities.com/SiliconValley/Park/9289/
          Born in Roswell... married an alien...