kc3-lang/gnulib/m4/wcwidth.m4

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• Hash : e6c7f8be
  Author :
  Date : 2020-07-25T23:27:40
  

  doc: Update for NetBSD 7.1, 8.0, 9.0.
  
  * doc/*/*.texi: Update.
  * m4/exp2l.m4: Update comments.
  * m4/expl.m4: Likewise.
  * m4/ilogb.m4: Likewise.
  * m4/ilogbf.m4: Likewise.
  * m4/log10l.m4: Likewise.
  * m4/logl.m4: Likewise.
  * m4/printf.m4: Likewise.
  * m4/rintl.m4: Likewise.
  * m4/wcwidth.m4: Likewise.
  

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• m4/wcwidth.m4

• # wcwidth.m4 serial 31
  dnl Copyright (C) 2006-2020 Free Software Foundation, Inc.
  dnl This file is free software; the Free Software Foundation
  dnl gives unlimited permission to copy and/or distribute it,
  dnl with or without modifications, as long as this notice is preserved.
  
  AC_DEFUN([gl_FUNC_WCWIDTH],
  [
    AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  
    dnl Persuade glibc <wchar.h> to declare wcwidth().
    AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
  
    AC_REQUIRE([gt_TYPE_WCHAR_T])
    AC_REQUIRE([gt_TYPE_WINT_T])
  
    AC_CHECK_HEADERS_ONCE([wchar.h])
    AC_CHECK_FUNCS_ONCE([wcwidth])
  
    AC_CHECK_DECLS([wcwidth], [], [], [[
  /* AIX 3.2.5 declares wcwidth in <string.h>. */
  #include <string.h>
  /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
     <wchar.h>.
     BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
     before <wchar.h>.  */
  #include <stddef.h>
  #include <stdio.h>
  #include <time.h>
  #include <wchar.h>
  ]])
    if test $ac_cv_have_decl_wcwidth != yes; then
      HAVE_DECL_WCWIDTH=0
    fi
  
    if test $ac_cv_func_wcwidth != yes; then
      AC_CACHE_CHECK([whether wcwidth is a macro],
        [gl_cv_func_wcwidth_macro],
        [AC_EGREP_CPP([wchar_header_defines_wcwidth], [
  #include <wchar.h>
  #ifdef wcwidth
   wchar_header_defines_wcwidth
  #endif],
           [gl_cv_func_wcwidth_macro=yes],
           [gl_cv_func_wcwidth_macro=no])
        ])
    fi
  
    if test $ac_cv_func_wcwidth = yes || test $gl_cv_func_wcwidth_macro = yes; then
      HAVE_WCWIDTH=1
      dnl On Mac OS X 10.3, wcwidth(0x0301) (COMBINING ACUTE ACCENT) returns 1.
      dnl On NetBSD 9.0, OpenBSD 5.0, wcwidth(0x05B0) (HEBREW POINT SHEVA) returns 1.
      dnl On NetBSD 9.0, OSF/1 5.1, wcwidth(0x200B) (ZERO WIDTH SPACE) returns 1.
      dnl On OpenBSD 5.8, wcwidth(0xFF1A) (FULLWIDTH COLON) returns 0.
      dnl This leads to bugs in 'ls' (coreutils).
      dnl On Solaris 11.4, wcwidth(0x2202) (PARTIAL DIFFERENTIAL) returns 2,
      dnl even in Western locales.
      AC_CACHE_CHECK([whether wcwidth works reasonably in UTF-8 locales],
        [gl_cv_func_wcwidth_works],
        [
          AC_RUN_IFELSE(
            [AC_LANG_SOURCE([[
  #include <locale.h>
  /* AIX 3.2.5 declares wcwidth in <string.h>. */
  #include <string.h>
  /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
     <wchar.h>.
     BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
     before <wchar.h>.  */
  #include <stddef.h>
  #include <stdio.h>
  #include <time.h>
  #include <wchar.h>
  #if !HAVE_DECL_WCWIDTH
  extern
  # ifdef __cplusplus
  "C"
  # endif
  int wcwidth (int);
  #endif
  int main ()
  {
    int result = 0;
    if (setlocale (LC_ALL, "en_US.UTF-8") != NULL)
      {
        if (wcwidth (0x0301) > 0)
          result |= 1;
        if (wcwidth (0x05B0) > 0)
          result |= 2;
        if (wcwidth (0x200B) > 0)
          result |= 4;
        if (wcwidth (0xFF1A) == 0)
          result |= 8;
        if (wcwidth (0x2202) > 1)
          result |= 16;
      }
    return result;
  }]])],
            [gl_cv_func_wcwidth_works=yes],
            [gl_cv_func_wcwidth_works=no],
            [
  changequote(,)dnl
             case "$host_os" in
                              # Guess yes on glibc systems.
               *-gnu* | gnu*) gl_cv_func_wcwidth_works="guessing yes";;
                              # Guess yes on musl systems.
               *-musl*)       gl_cv_func_wcwidth_works="guessing yes";;
                              # Guess yes on AIX 7 systems.
               aix[7-9]*)     gl_cv_func_wcwidth_works="guessing yes";;
               *)             gl_cv_func_wcwidth_works="$gl_cross_guess_normal";;
             esac
  changequote([,])dnl
            ])
        ])
      case "$gl_cv_func_wcwidth_works" in
        *yes) ;;
        *no) REPLACE_WCWIDTH=1 ;;
      esac
    else
      HAVE_WCWIDTH=0
    fi
    dnl We don't substitute HAVE_WCWIDTH. We assume that if the system does not
    dnl have the wcwidth function, then it does not declare it.
  ])
  
  # Prerequisites of lib/wcwidth.c.
  AC_DEFUN([gl_PREREQ_WCWIDTH], [
    AC_REQUIRE([AC_C_INLINE])
    :
  ])
  

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