Dear all, I am writing with a quesiton about the AC_SYS_LARGEFILE macro. It would be great to be able to use it but according to its documentation, the macro adds its flags to the CC output variable, which is not convenient in my context because we have dedicated variables not only for C flags but also for C preprocessor flags. Thus, what I'd ideally need is a version of the macro where I can somehow specify what to do with both large-file related CFLAGS and CPPFLAGS. Any comment will be warmly appreciated. Many thanks in advance, Sébastien.