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-rw-r--r--Documentation/kbuild/makefiles.txt27
1 files changed, 22 insertions, 5 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 8abd041b605..c375313cb12 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -921,16 +921,33 @@ When kbuild executes, the following steps are followed (roughly):
The first example utilises the trick that a config option expands
to 'y' when selected.
- CFLAGS_KERNEL $(CC) options specific for built-in
+ KBUILD_AFLAGS_KERNEL $(AS) options specific for built-in
- $(CFLAGS_KERNEL) contains extra C compiler flags used to compile
+ $(KBUILD_AFLAGS_KERNEL) contains extra C compiler flags used to compile
resident kernel code.
- CFLAGS_MODULE $(CC) options specific for modules
+ KBUILD_AFLAGS_MODULE Options for $(AS) when building modules
- $(CFLAGS_MODULE) contains extra C compiler flags used to compile code
- for loadable kernel modules.
+ $(KBUILD_AFLAGS_MODULE) is used to add arch specific options that
+ are used for $(AS).
+ From commandline AFLAGS_MODULE shall be used (see kbuild.txt).
+ KBUILD_CFLAGS_KERNEL $(CC) options specific for built-in
+
+ $(KBUILD_CFLAGS_KERNEL) contains extra C compiler flags used to compile
+ resident kernel code.
+
+ KBUILD_CFLAGS_MODULE Options for $(CC) when building modules
+
+ $(KBUILD_CFLAGS_MODULE) is used to add arch specific options that
+ are used for $(CC).
+ From commandline CFLAGS_MODULE shall be used (see kbuild.txt).
+
+ KBUILD_LDFLAGS_MODULE Options for $(LD) when linking modules
+
+ $(KBUILD_LDFLAGS_MODULE) is used to add arch specific options
+ used when linking modules. This is often a linker script.
+ From commandline LDFLAGS_MODULE shall be used (see kbuild.txt).
--- 6.2 Add prerequisites to archprepare: