Fabian Groffen wrote:

On 29-05-2008 09:38:35 +0200, Fabian Groffen wrote:

...

On 28-05-2008 17:44:17 +0200, Ying Zhang wrote:

...

Dear all,

I use HOST_NAME_MAX in my code. Compiling the code on a CWI machine does not have any problem, however, compilation on Mac OS 10.5 complains that HOST_NAME_MAX is not defined. fgrep on mac 10.5 says:

$fgrep -r HOST_NAME_MAX /usr/include/* /usr/include/limits.h:#define _POSIX_HOST_NAME_MAX 255 /usr/include/unistd.h:#define _SC_HOST_NAME_MAX 72

How (and where) can I add proper check to define HOST_NAME_MAX for darwin 9?

Create a configure check, or define it within guards when it's not defined.

PS. since OSX 10.5 is UNIX 2003, you probably define HOST_NAME_MAX as _POSIX_HOST_NAME_MAX.

Note that on Solaris (10):

[hathor:usr/portage/scripts] % grep HOST_NAME_MAX /usr/include/* /usr/include/limits.h:#define _POSIX_HOST_NAME_MAX 255 [hathor:usr/portage/scripts] % grep HOST_NAME_MAX /usr/include/sys/* /usr/include/sys/unistd.h:#define _SC_HOST_NAME_MAX 735

Note that _SC_HOST_NAME_MAX is the argument to sysconf (see man sysconf) to find out what the kernel's value for HOST_NAME_MAX is. It is not itself the value.