Hi, https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Hosts-and-Cross_002dCompilation.html is rather hard to follow in general, but also contains the following clear-cut statement: "Now, configure enters cross-compilation mode if and only if --host is passed." However, if I pass in my build architecture Autoconf 2.69 reports: $ ./configure --host=x86_64-linux-gnu checking for x86_64-linux-gnu-gcc... x86_64-linux-gnu-gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no [...] That is, it finds the compiler with the prefixed name but does not enter cross-compilation mode. Does "cross-compilation mode" mean something different, do I misunderstand the documentation, or what is the resolution of this apparent (to me) contradiction? (Please Cc me, I'm not subscribed.) -- Thanks, Feri