I am having a bad day with autoconf. It seems that AC_CHECK_SIZEOF(uint32_t) won't work, because the macro does not include sys/types.h before making the test. Can anyone think of any way to test for the existance of these types in autoconf? a #ifdef isn't good enough as the type may have been created using typedef rather than #define. Damien -- | "Bombay is 250ms from New York in the new world order" - Alan Cox | Damien Miller - http://www.mindrot.org/ | Email: djm at mindrot.org (home) -or- djm at ibs.com.au (work)