On Sun, Jun 16, 2019 at 12:56:52PM -0400, Tom Lane wrote: > There are a few places in configure and the makefiles that are looking > at $host_cpu to decide what to do. As far as I can tell, almost all of > them are wrong and should be looking at $target_cpu instead. (The > lack of complaints indicates that nobody is trying very hard to test > cross-compilation.)
https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Specifying-Target-Triplets.html describes the intended usage. When cross-compiling, $host_cpu is the machine able to run the resulting PostgreSQL installation, and $build_cpu is the machine creating that installation. PostgreSQL does not contain a compiler that emits code as output to the user, so $target_cpu is meaningless. Every use of $host_cpu looks correct.