--- configure.ac.orig 2021-11-25 09:41:46 UTC
+++ configure.ac
@@ -11,6 +11,7 @@ AC_DEFINE_UNQUOTED(PLATFORM, "$ac_cv_host",
[the type of system on which the package will run.])
# Checks for programs.
+AC_PROG_CPP
AC_PROG_CC
AC_PROG_GCC_TRADITIONAL
AC_PROG_INSTALL