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-rw-r--r--Makefile5
1 files changed, 5 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 5549368b492f..41a006aab00d 100644
--- a/Makefile
+++ b/Makefile
@@ -63,6 +63,11 @@
# release of 4.0. You have exactly one major release to move entirely
# to elf.
#
+# If -DTARGET_ARCH=arch (e.g. ia64, sparc64, ...) is specified you can
+# cross build world for other architectures using the buildworld target,
+# and once the world is built you can cross build a kernel using the
+# buildkernel target.
+#
# ----------------------------------------------------------------------------
#
# Upgrading an i386 system from a.out to elf format