On Tue, Aug 2, 2016 at 12:52 AM, Darren Tucker <dtucker@xxxxxxxxxx> 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 configure.ac:
dnl Wide character support. Linux man page says it needs _XOPEN_SOURCE.
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -D_XOPEN_SOURCE"
AC_CHECK_FUNCS([mblen mbtowc nl_langinfo wcwidth])
CFLAGS="$saved_CFLAGS"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(and
[[ #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 zip.com.au)
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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