From af744cea8013bb50a297928da974d30d24ede283 Mon Sep 17 00:00:00 2001
From: Moritz Bunkus <moritz@bunkus.org>
Date: Fri, 27 Sep 2019 17:01:22 +0200
Subject: [PATCH] build system: verify configured host type is same as current
 host type

---
 Rakefile          | 1 +
 rake.d/helpers.rb | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/Rakefile b/Rakefile
index 816a578da..a8e7f83fc 100644
--- a/Rakefile
+++ b/Rakefile
@@ -277,6 +277,7 @@ def define_default_task
 end
 
 # main
+verify_current_host_is_same_as_configured
 setup_globals
 setup_overrides
 import_dependencies
diff --git a/rake.d/helpers.rb b/rake.d/helpers.rb
index fde8267f9..da20ddbdd 100644
--- a/rake.d/helpers.rb
+++ b/rake.d/helpers.rb
@@ -287,6 +287,13 @@ def update_version_number_include
   end
 end
 
+def verify_current_host_is_same_as_configured
+  current_host = `#{$source_dir}/config.guess 2> /dev/null`.chomp
+  return if !current_host || (current_host == c(:host))
+
+  fail "Error: The source tree was configured on a different host system type (#{c(:host)}) than the current one (#{current_host}). This is not supported."
+end
+
 class Rake::Task
   def mo_all_prerequisites
     todo   = [name]