m4/mbswidth.m4

   1 #serial 7
   2
   3 dnl autoconf tests required for use of mbswidth.c
   4 dnl From Bruno Haible.
   5
   6 AC_DEFUN([jm_PREREQ_MBSWIDTH],
   7 [
   8   AC_REQUIRE([AC_HEADER_STDC])
   9   AC_CHECK_HEADERS(limits.h stdlib.h string.h wchar.h wctype.h)
  10   AC_CHECK_FUNCS(isascii iswcntrl iswprint mbsinit wcwidth)
  11   jm_FUNC_MBRTOWC
  12
  13   AC_CACHE_CHECK([whether wcwidth is declared], ac_cv_have_decl_wcwidth,
  14     [AC_TRY_COMPILE([
  15 /* AIX 3.2.5 declares wcwidth in <string.h>. */
  16 #if HAVE_STRING_H
  17 # include <string.h>
  18 #endif
  19 #if HAVE_WCHAR_H
  20 # include <wchar.h>
  21 #endif
  22 ], [
  23 #ifndef wcwidth
  24   char *p = (char *) wcwidth;
  25 #endif
  26 ], ac_cv_have_decl_wcwidth=yes, ac_cv_have_decl_wcwidth=no)])
  27   if test $ac_cv_have_decl_wcwidth = yes; then
  28     ac_val=1
  29   else
  30     ac_val=0
  31   fi
  32   AC_DEFINE_UNQUOTED(HAVE_DECL_WCWIDTH, $ac_val,
  33     [Define to 1 if you have the declaration of wcwidth(), and to 0 otherwise.])
  34
  35   AC_TYPE_MBSTATE_T
  36 ])