Date: Sun, 30 Apr 1995 15:21:21 +1000 From: Bruce Evans <bde@zeta.org.au> To: freebsd-hackers@FreeBSD.org Subject: Re: aspfilter & stdin Message-ID: <199504300521.PAA14142@godzilla.zeta.org.au>
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>> FreeBSD 2.0 introduces something new, which made this necessary: >> >> #ifdef __FreeBSD__ >NOOO! >I'm not sure which systems define the 2nd parameter of lseek() to >be off_t. Anyway, from /usr/ports/GUIDELINES: >0.2 The preferred way to tell 4.3BSD/Reno and newer versions of the BSD code > apart is by using the "BSD" macro defined in <sys/param.h>. Hopefully that > file is already included; if not, add the code: >* #ifdef _HAVE_PARAM_H >* #include <sys/param.h> >* #endif >... NOOOOOOO !:-) All POSIX systems declare the 2nd parameter of lseek() to be off_t. To decide if the system is POSIX, you can try #include <sys/types.h> #include <unistd.h> #ifdef _POSIX_VERSION ... This may fail if <sys/types.h> or <unistd.h> doesn't exist, or if the system defines _POSIX_VERSION but isn't POSIX. Something like gnu autoconfig is required to build and run test programs that decide if the headers exists and if lseek() exists and works. Bruce
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