+if test "$wxUSE_UNICODE" = "yes" -a \
+ \( "$wxUSE_STD_STRING" = "yes" -o "$wxUSE_STL" = "yes" \); then
+ AC_LANG_PUSH(C++)
+
+ dnl check if <string> declares std::wstring
+ AC_MSG_CHECKING([for std::wstring in <string>])
+ AC_TRY_COMPILE([#include <string>],
+ [std::wstring foo;],
+ [AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_STD_WSTRING)],
+ [AC_MSG_RESULT(no)
+ AC_MSG_CHECKING([if std::basic_string<wchar_t> works])
+ AC_TRY_COMPILE([
+ #ifdef HAVE_WCHAR_H
+ # ifdef __CYGWIN__
+ # include <stddef.h>
+ # endif
+ # include <wchar.h>
+ #endif
+ #ifdef HAVE_STDLIB_H
+ # include <stdlib.h>
+ #endif
+ #include <stdio.h>
+ #include <string>
+ ],
+ [std::basic_string<wchar_t> foo;
+ const wchar_t* dummy = foo.c_str();],
+ [AC_MSG_RESULT(yes)],
+ [AC_MSG_RESULT([no])
+ AC_MSG_ERROR([Can't compile without unicode string class])]
+ )
+ ])
+
+ AC_LANG_POP
+fi
+