kbuild: Allow arch Makefiles to override {cpp,ld,c}flags

[mirror_ubuntu-artful-kernel.git] / Documentation / kbuild / makefiles.txt

diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index e63b446d973cd716097adb60295577fe558f3f96..13f888a02a3de5cb7ecfdb2ed03eb1d721601de9 100644 (file)
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -952,6 +952,14 @@ When kbuild executes, the following steps are followed (roughly):
        $(KBUILD_ARFLAGS) set by the top level Makefile to "D" (deterministic
        mode) if this option is supported by $(AR).
 
+    ARCH_CPPFLAGS, ARCH_AFLAGS, ARCH_CFLAGS   Overrides the kbuild defaults
+
+       These variables are appended to the KBUILD_CPPFLAGS,
+       KBUILD_AFLAGS, and KBUILD_CFLAGS, respectively, after the
+       top-level Makefile has set any other flags. This provides a
+       means for an architecture to override the defaults.
+
+
 --- 6.2 Add prerequisites to archheaders:
 
        The archheaders: rule is used to generate header files that