dnl Written by Eric Blake.
-# wchar.m4 serial 3
+# wchar.m4 serial 4
AC_DEFUN([gl_WCHAR_H],
[
+ AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
AC_CACHE_CHECK([whether <wchar.h> is standalone],
[gl_cv_header_wchar_h_standalone],
[AC_COMPILE_IFELSE([[#include <wchar.h>
wchar_t w;]],
[gl_cv_header_wchar_h_standalone=yes],
[gl_cv_header_wchar_h_standalone=no])])
- if test $gl_cv_header_wchar_h_standalone = yes; then
- WCHAR_H=
- else
- dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
- dnl character support).
- AC_CHECK_HEADERS_ONCE([wchar.h])
- if test $ac_cv_header_wchar_h = yes; then
- HAVE_WCHAR_H=1
- else
- HAVE_WCHAR_H=0
- fi
- AC_SUBST([HAVE_WCHAR_H])
- gl_CHECK_NEXT_HEADERS([wchar.h])
+ if test $gl_cv_header_wchar_h_standalone != yes; then
WCHAR_H=wchar.h
fi
+
+ dnl Prepare for creating substitute <wchar.h>.
+ dnl Do it always: WCHAR_H may be empty here but can be set later.
+ dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
+ dnl character support).
+ AC_CHECK_HEADERS_ONCE([wchar.h])
+ if test $ac_cv_header_wchar_h = yes; then
+ HAVE_WCHAR_H=1
+ else
+ HAVE_WCHAR_H=0
+ fi
+ AC_SUBST([HAVE_WCHAR_H])
+ gl_CHECK_NEXT_HEADERS([wchar.h])
+])
+
+AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
+[
+ dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+ AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+ GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+])
+
+AC_DEFUN([gl_WCHAR_H_DEFAULTS],
+[
+ GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH])
+ dnl Assume proper GNU behavior unless another module says otherwise.
+ HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH])
+ REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
+ WCHAR_H=
AC_SUBST([WCHAR_H])
])