OpenSSH 7.3p1 can't be build on Solaris 10

Darren Tucker dtucker at
Tue Aug 2 13:44:49 AEST 2016

On Tue, Aug 2, 2016 at 12:52 AM, Darren Tucker <dtucker at> wrote:
>> Seems can't. But why? 7.2 does.
> Dunno, I can't think of any obvious changes to compiler flags.  Maybe
> try it without setting CFLAGS?

OK, I think I see why it started in 7.3: it was when the wide
character support was added.  In

dnl Wide character support.  Linux man page says it needs _XOPEN_SOURCE.
AC_CHECK_FUNCS([mblen mbtowc nl_langinfo wcwidth])

           [[ #include <ctype.h> ]],
           [[ return (isblank('a')); ]])],
        [AC_DEFINE([HAVE_ISBLANK], [1], [Define if you have isblank(3C).])

before that the mblen test didn't have XOPEN_SOURCE.

The failing condition is "if defined(_STDC_C99) &&
(defined(__XOPEN_OR_POSIX) && !defined(_XPG6))".  The above explains
where the XOPEN came from.  As to why you're seeing it, my guess is
your version of gcc defaults to -std=c99 and mine doesn't.  You can
try adding "-std=c89" to your CFLAGS and see if it builds.

Darren Tucker (dtucker at
GPG key 11EAA6FA / A86E 3E07 5B19 5880 E860  37F4 9357 ECEF 11EA A6FA (new)
    Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.

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