[Bug libfortran/63471] [5.0 Regression] unix.c:1906:10: error: implicit declaration of function 'ttyname_r'

dave.anglin at bell dot net gcc-bugzilla@gcc.gnu.org
Wed Oct 8 15:37:00 GMT 2014


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63471

--- Comment #3 from dave.anglin at bell dot net ---
On 10/8/2014 9:43 AM, jb at gcc dot gnu.org wrote:
> Hmm, maybe add something like
>
> AC_CHECK_DECLS_ONCE([ttyname_r])
>
> to configure.ac and then in unix.c(stream_ttyname) check with
>
> #ifdef HAVE_TTYNAME_R && HAVE_DECL_TTYNAME_R
Don't we want to use ttyname_r in multithreaded applications?

It seems HP-UX is the only platform to hide the declaration of ttyname_r 
using _REENTRANT :-(
If configure finds ttyname_r, then presumably we don't need pthread 
linking for it.

On some platforms (MacOS 10.4 and Solaris 11), ttyname_r may return a 
'char *', not 'int'.

Dave



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