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| author | Sam Ravnborg <sam@ravnborg.org> | 2011-04-27 22:29:49 +0200 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.cz> | 2011-04-28 18:01:41 +0200 |
| commit | d8ecc5cd8e227bc318513b5306ae88a474b8886d (patch) | |
| tree | f05fe662c000b8219923b8c464c9c186b599190e /scripts/Makefile.asm-generic | |
| parent | 28bc20dccadc610c56e27255aeef2938141a0cd3 (diff) | |
| download | lwn-d8ecc5cd8e227bc318513b5306ae88a474b8886d.tar.gz lwn-d8ecc5cd8e227bc318513b5306ae88a474b8886d.zip | |
kbuild: asm-generic support
There is an increasing amount of header files
shared between individual architectures in asm-generic.
To avoid a lot of dummy wrapper files that just
include the corresponding file in asm-generic provide
some basic support in kbuild for this.
With the following patch an architecture can maintain
a list of files in the file arch/$(ARCH)/include/asm/Kbuild
To use a generic file just add:
generic-y += <name-of-header-file.h>
For each file listed kbuild will generate the necessary
wrapper in arch/$(ARCH)/include/generated/asm.
When installing userspace headers a wrapper is likewise created.
The original inspiration for this came from the unicore32
patchset - although a different method is used.
The patch includes several improvements from Arnd Bergmann.
Michael Marek contributed Makefile.asm-generic.
Remis Baima did an intial implementation along to achive
the same - see https://patchwork.kernel.org/patch/13352/
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Guan Xuetao <guanxuetao@mprc.pku.edu.cn>
Tested-by: Guan Xuetao <guanxuetao@mprc.pku.edu.cn>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'scripts/Makefile.asm-generic')
| -rw-r--r-- | scripts/Makefile.asm-generic | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/scripts/Makefile.asm-generic b/scripts/Makefile.asm-generic new file mode 100644 index 000000000000..a687cb697e35 --- /dev/null +++ b/scripts/Makefile.asm-generic @@ -0,0 +1,23 @@ +# include/asm-generic contains a lot of files that are used +# verbatim by several architectures. +# +# This Makefile reads the file arch/$(SRCARCH)/include/asm/Kbuild +# and for each file listed in this file with generic-y creates +# a small wrapper file in $(obj) (arch/$(SRCARCH)/include/generated/asm) + +kbuild-file := $(srctree)/arch/$(SRCARCH)/include/asm/Kbuild +include $(kbuild-file) + +include scripts/Kbuild.include + +# Create output directory if not already present +_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) + +quiet_cmd_wrap = WRAP $@ +cmd_wrap = echo "\#include <asm-generic/$*.h>" >$@ + +all: $(patsubst %, $(obj)/%, $(generic-y)) + +$(obj)/%.h: + $(call cmd,wrap) + |