kbuild: Fix build with binutils <= 2.19

The D option of ar is only available in newer versions.

Signed-off-by: Michal Marek <mmarek@suse.cz>

1 files changed, 5 insertions, 0 deletions

diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 5d145bb443c0..40e082bb8c52 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -955,6 +955,11 @@ When kbuild executes, the following steps are followed (roughly):
         used when linking modules. This is often a linker script.
         From commandline LDFLAGS_MODULE shall be used (see kbuild.txt).
 
+    KBUILD_ARFLAGS   Options for $(AR) when creating archives
+
+        $(KBUILD_ARFLAGS) set by the top level Makefile to "D" (deterministic
+        mode) if this option is supported by $(AR).
+
 --- 6.2 Add prerequisites to archprepare:
 
         The archprepare: rule is used to list prerequisites that need to be