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-rw-r--r--gdb/gnulib/m4/wchar.m454
1 files changed, 54 insertions, 0 deletions
diff --git a/gdb/gnulib/m4/wchar.m4 b/gdb/gnulib/m4/wchar.m4
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+dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
+
+dnl Copyright (C) 2007 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.
+
+dnl Written by Eric Blake.
+
+# 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=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])
+])