On Tue, Aug 2, 2016 at 12:52 AM, Darren Tucker <dtucker at zip.com.au> 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.
On Tue, Aug 2, 2016 at 1:44 PM, Darren Tucker <dtucker at zip.com.au> wrote: [...]> 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.Alternatively, try adding -D_XPG6 to CFLAGS. -- 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.
On Tue, Aug 2, 2016 at 2:02 PM, Darren Tucker <dtucker at zip.com.au> wrote:> On Tue, Aug 2, 2016 at 1:44 PM, Darren Tucker <dtucker at zip.com.au> wrote: > [...] >> 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. > > Alternatively, try adding -D_XPG6 to CFLAGS.That may not be the right thing. Looks like this might be a known GCC bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40411 -- 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.