1 files changed, 54 insertions, 0 deletions
diff --git a/gdb/gnulib/m4/wchar.m4 b/gdb/gnulib/m4/wchar.m4
new file mode 100644
index 00000000000..70b1248f8fc
--- /dev/null
+++ b/gdb/gnulib/m4/wchar.m4
@@ -0,0 +1,54 @@
+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])
+])