On Thu, Feb 4, 2021 at 11:27 AM Sébastien Hinderer <Sebastien.Hinderer@xxxxxxxx> wrote: > > Dear all, > > I just noticed a behaviour of a configure script that surprises me. > > The configure.ac script does contain the AC_CANONICAL_BUILD, > AC_CANONICAL_HOST and AC_CANONICAL_TARGET macros. > > I am calling the generated configure script as follows: > > ./configure --build=x86_64-pc-linux-gnu --host=aarch64-linux-gnu > > I am getting the following output: > > checking build system type... x86_64-pc-linux-gnu > checking host system type... aarch64-unknown-linux-gnu > checking target system type... aarch64-unknown-linux-gnu > > I am okay with the first line but to absolutely not understandthe second > and third line. Why do the host and system types contain an "unknown" > string? > > Since I gave the --host=aarch64-linux-gnu arguemnt, I expected this to > be the canonical system type. And also, I thought the target system type > would default to the user-provided host system type, which does not seem > to be the case. > > Should I then rely on the host_alias and target_alias variables? It > feels odd because they may not be in canonical form and also this means > that the target will have to be explicitly given, which I thought I > don't have to do. > > Any help would be greatly appreciated. Thanks! > > Sébastien. >
