Cope if platform declares mbstowcs_l(), but not locale_t, in <xlocale.h>.
Previously, we included <xlocale.h> only if necessary to get the definition
of type locale_t. According to notes in PGAC_TYPE_LOCALE_T, this is
important because on some versions of glibc that file supplies an
incompatible declaration of locale_t. (This info may be obsolete, because
on my RHEL6 box that seems to be the *only* definition of locale_t; but
there may still be glibc's in the wild for which it's a live concern.)
It turns out though that on FreeBSD and maybe other BSDen, you can get
locale_t from stdlib.h or locale.h but mbstowcs_l() and friends only from
<xlocale.h>. This was leaving us compiling calls to mbstowcs_l() and
friends with no visible prototype, which causes a warning and could
possibly cause actual trouble, since it's not declared to return int.
Hence, adjust the configure checks so that we'll include <xlocale.h>
either if it's necessary to get type locale_t or if it's necessary to
get a declaration of mbstowcs_l().
Report and patch by Aleksander Alekseev, somewhat whacked around by me.
Back-patch to all supported branches, since we have been using
mbstowcs_l() since 9.1.
Branch
------
REL9_1_STABLE
Details
-------
http://git.postgresql.org/pg/commitdiff/0c94970c932de50bfa4c57da815756de76b941f1
Modified Files
--------------
config/c-library.m4 | 32 ++++++++++++-
configure | 105 ++++++++++++++++++++++++++++++++++++++++++
configure.in | 1 +
src/include/pg_config.h.in | 3 ++
src/include/pg_config.h.win32 | 3 ++
src/include/utils/pg_locale.h | 2 +-
6 files changed, 144 insertions(+), 2 deletions(-)
