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kbuild: support building individual files for external modules

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Support building individual files when dealing with separate modules.
So say you have a module named "foo" which consist of two .o files bar.o
and fun.o.

You can then do:
make -C $KERNELSRC M=`pwd` bar.o
make -C $KERNELSRC M=`pwd` bar.lst
make -C $KERNELSRC M=`pwd` bar.i
make -C $KERNELSRC M=`pwd` /            <= will build all .o files
                                           and link foo.o
make -C $KERNELSRC M=`pwd` foo.ko       <= will build the module
                                           and do the modpost step
					   to create foo.ko

The above will also work if the external module is placed in a
subdirectory using a hirachy of kbuild files.
Thanks to Andreas Gruenbacher <[email protected]> for initial feature
request / bug report.

Signed-off-by: Sam Ravnborg <[email protected]>
This commit is contained in:
Sam Ravnborg 2006-01-25 07:13:18 +01:00
commit 06300b21f4
2 changed files with 55 additions and 22 deletions
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11
Documentation/kbuild/modules.txt
View file

@ -13,6 +13,7 @@ In this document you will find information about:
--- 2.2 Available targets
--- 2.3 Available options
--- 2.4 Preparing the kernel tree for module build
--- 2.5 Building separate files for a module
=== 3. Example commands
=== 4. Creating a kbuild file for an external module
=== 5. Include files
@ -131,6 +132,16 @@ when building an external module.
Therefore a full kernel build needs to be executed to make
module versioning work.
--- 2.5 Building separate files for a module
It is possible to build single files which is part of a module.
This works equal for the kernel, a module and even for external
modules.
Examples (module foo.ko, consist of bar.o, baz.o):
make -C $KDIR M=`pwd` bar.lst
make -C $KDIR M=`pwd` bar.o
make -C $KDIR M=`pwd` foo.ko
make -C $KDIR M=`pwd` /
=== 3. Example commands