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authorRichard Hacker <lerichi@gmx.net>2008-02-28 09:40:58 +0100
committerSam Ravnborg <sam@uranus.ravnborg.org>2008-04-25 20:45:26 +0200
commit0d96fb20b7ed757fc936bb35e26c22251a75b734 (patch)
tree6a82ad54353d40ddc97dbb600b214a1944f023c2 /Documentation/kbuild/modules.txt
parent2d04b5ae1bf527201a7505c9be7526c43ebd2930 (diff)
kbuild: Add new Kbuild variable KBUILD_EXTRA_SYMBOLS
This patch adds a new (Kbuild) Makefile variable KBUILD_EXTRA_SYMBOLS. The space separated list of file names assigned to KBUILD_EXTRA_SYMBOLS is used when calling scripts/mod/modpost during stage 2 of the Kbuild process for non-kernel-tree modules. Signed-off-by: Richard Hacker <lerichi@gmx.net> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'Documentation/kbuild/modules.txt')
-rw-r--r--Documentation/kbuild/modules.txt9
1 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/kbuild/modules.txt b/Documentation/kbuild/modules.txt
index 1d247d59ad5..1821c077b43 100644
--- a/Documentation/kbuild/modules.txt
+++ b/Documentation/kbuild/modules.txt
@@ -486,7 +486,7 @@ Module.symvers contains a list of all exported symbols from a kernel build.
Sometimes, an external module uses exported symbols from another
external module. Kbuild needs to have full knowledge on all symbols
to avoid spitting out warnings about undefined symbols.
- Two solutions exist to let kbuild know all symbols of more than
+ Three solutions exist to let kbuild know all symbols of more than
one external module.
The method with a top-level kbuild file is recommended but may be
impractical in certain situations.
@@ -523,6 +523,13 @@ Module.symvers contains a list of all exported symbols from a kernel build.
containing the sum of all symbols defined and not part of the
kernel.
+ Use make variable KBUILD_EXTRA_SYMBOLS in the Makefile
+ If it is impractical to copy Module.symvers from another
+ module, you can assign a space separated list of files to
+ KBUILD_EXTRA_SYMBOLS in your Makfile. These files will be
+ loaded by modpost during the initialisation of its symbol
+ tables.
+
=== 8. Tips & Tricks
--- 8.1 Testing for CONFIG_FOO_BAR