build: simplify and organize configure

 - There's no need for the various AC_PROG_CC* macros
 - No need for AC_C_BIGENDIAN: the only place we care about endianness,
   we use __BYTE_ORDER
 - Organize calls to be in similar order as systemd
 - Disable --disable-largefile. We already had possible bugs in the
   index implementation if this were passed. It's now fixed, but it's
   never tested. Disable it.
 - Bump autoconf requirement to 2.64
1 file changed