Hello, Eric. On Fr, 27/04/2009 06:09 -0600, you wrote: > According to Konstantin Andreev on 4/27/2009 3:20 AM: > > > > Could you advise, how to correctly determine which header a symbol is declared in ? > > Why? Functionally, all you need to know is whether a symbol is declared within a set of headers, rather than trying to go the extra mile to figure out which exact header. So for this particular case, I would have used something like: > > AC_CHECK_DECLS([bzero],[],[],[AC_INCLUDES_DEFAULT > [#include <string.h> > #ifdef HAVE_STRINGS_H > # include <strings.h> > #endif > ]]) > > to find whether bzero is declared in either string.h or strings.h, then include both headers in my code. > I have heard that 'string.h' and 'strings.h' are incompatible on some systems, and including both may causes problems. So, if I include only one of them, I increase portability. > But ultimately, bzero is declared obsolete by POSIX. If you REALLY want to be portable, I'd write your code to use memset and not bzero. > You are certainly right concerning 'bzero', but the question remains out of purely academic interest: What is the simplest way to determine with autoconf the exact header, where the symbol is declared in ? Best regards, -- Konstantin Andreev. _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
