[BINDINGS_CXX="no"; cxx_msg="glibmm required"])
# C++ bindings want stoi and stod.
-if test "x$BINDINGS_CXX" == "xyes"; then
+if test "x$BINDINGS_CXX" = "xyes"; then
AC_LANG_PUSH([C++])
AC_MSG_CHECKING([for stoi and stod])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <string>],