Hello
When compiling the following program on a Fedora 6 x86_64 system:
#include <stdio.h>
#include <limits.h>
int
main(void)
{
(void)printf("%llu\n", ULLONG_MAX);
return 0;
}
Produces the following result:
cc longlong.c
longlong.c: In function 'main':
longlong.c:7: error: 'ULLONG_MAX' undeclared (first use in this function)
longlong.c:7: error: (Each undeclared identifier is reported only once
longlong.c:7: error: for each function it appears in.)
If I compile it with cc -std=c99 longlong.c it works.
Why is it necessary to specify -std=c99? If I use for example strtoull()
I do not need to set -std=c99.
Compiling the above on AIX compiles and runs without problems. Also
on an older Solaris 8 system using gcc (3.3.2) it compiles and runs
straight out of the box.
If I want to use ULLONG_MAX how can I do this in a portable way so it
compiles on different systems?
Thanks,
Holger
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