Merge branch 'rickard/cross-build-host-triplets-check/ERIERL-668/OTP-17514' into rickard/cross-build-host-triplets-check/master/ERIERL-668/OTP-17514

* rickard/cross-build-host-triplets-check/ERIERL-668/OTP-17514:
  Update configure scripts
  Fail if canonicalized host and build equals when cross compiling

1 files changed, 18 insertions, 0 deletions

diff --git a/erts/configure b/erts/configure
index 9614ce6af2..cfc81d437b 100755
--- a/erts/configure
+++ b/erts/configure
@@ -3830,6 +3830,24 @@ esac
      ;;
 esac
 
+    if test "$cross_compiling" = "yes" -a "$build" = "$host"
+then :
+  as_fn_error $? "
+           Cross compiling with the same canonicalized 'host' value
+           as the canonicalized 'build' value.
+
+           We are cross compiling since the '--host=$host_alias'
+           and the '--build=$build_alias' arguments differ. When
+           cross compiling Erlang/OTP, also the canonicalized values of
+           the '--build' and the '--host' arguments *must* differ. The
+           canonicalized values of these arguments however both equals:
+           $host
+
+           You can check the canonical value by passing a value as
+           argument to the 'make/autoconf/config.sub' script.
+          " "$LINENO" 5
+fi
+
 
 if test "$cross_compiling" = "yes"; then
     CROSS_COMPILING=yes