m4/duplocale.m4

   1 # duplocale.m4 serial 2
   2 dnl Copyright (C) 2009, 2010 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 AC_DEFUN([gl_FUNC_DUPLOCALE],
   8 [
   9   AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
  10   AC_REQUIRE([AC_CANONICAL_HOST])
  11   AC_CHECK_FUNCS_ONCE([duplocale])
  12   if test $ac_cv_func_duplocale = yes; then
  13     dnl Check against glibc bug where duplocale crashes.
  14     dnl See <http://sourceware.org/bugzilla/show_bug.cgi?id=10969>.
  15     AC_REQUIRE([gl_LOCALE_H])
  16     AC_CACHE_CHECK([whether duplocale(LC_GLOBAL_LOCALE) works],
  17       [gl_cv_func_duplocale_works],
  18       [AC_TRY_RUN([
  19 #include <locale.h>
  20 #if HAVE_XLOCALE_H
  21 # include <xlocale.h>
  22 #endif
  23 int main ()
  24 {
  25   (void) duplocale (LC_GLOBAL_LOCALE);
  26   return 0;
  27 }], [gl_cv_func_duplocale_works=yes], [gl_cv_func_duplocale_works=no],
  28          [dnl Guess it works except on glibc < 2.12.
  29           AC_EGREP_CPP([Unlucky GNU user], [
  30 #include <features.h>
  31 #ifdef __GNU_LIBRARY__
  32  #if (__GLIBC__ == 2 && __GLIBC_MINOR__ < 12)
  33   Unlucky GNU user
  34  #endif
  35 #endif
  36             ],
  37             [gl_cv_func_duplocale_works="guessing no"],
  38             [gl_cv_func_duplocale_works="guessing yes"])
  39          ])
  40       ])
  41     case "$gl_cv_func_duplocale_works" in
  42       *no) REPLACE_DUPLOCALE=1 ;;
  43     esac
  44   else
  45     HAVE_DUPLOCALE=0
  46   fi
  47   if test $REPLACE_DUPLOCALE = 1; then
  48     gl_REPLACE_LOCALE_H
  49     AC_LIBOBJ([duplocale])
  50     gl_PREREQ_DUPLOCALE
  51   fi
  52 ])
  53
  54 # Prerequisites of lib/duplocale.c.
  55 AC_DEFUN([gl_PREREQ_DUPLOCALE],
  56 [
  57   :
  58 ])