GUILE_FLAGS before AC_CHECK_HEADERS

AC_INIT([guileflags], [1.5.0], [foo@example.com])
AC_PREREQ(2.54)

# Checks for programs.
AC_PROG_CC

if false
then
   GUILE_FLAGS
   GUILE_VERSION=`$GUILE_CONFIG info guileversion`
fi
AC_CHECK_HEADERS([stdarg.h])
echo "ac_cpp=$ac_cpp CPP=$CPP" >&6

AC_OUTPUT