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kbuild doc: a bundle of fixes on makefiles.txt

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It does several fixes:
1. move the displaced ld example to its reasonable place.
2. add new example for command gzip.
3. fix 2 number errors.
4. fix format of chapter 7.x, make it looks the same as other chapters.

Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Cao jin 2017-10-19 11:17:05 +08:00 committed by Masahiro Yamada
parent bbfe63b60a
commit d87e47e13a
1 changed files with 18 additions and 13 deletions
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31
Documentation/kbuild/makefiles.txt
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@ -1108,14 +1108,6 @@ When kbuild executes, the following steps are followed (roughly):
ld
Link target. Often, LDFLAGS_$@ is used to set specific options to ld.
objcopy
Copy binary. Uses OBJCOPYFLAGS usually specified in
arch/$(ARCH)/Makefile.
OBJCOPYFLAGS_$@ may be used to set additional options.
gzip
Compress target. Use maximum compression to compress target.
Example:
#arch/x86/boot/Makefile
LDFLAGS_bootsect := -Ttext 0x0 -s --oformat binary
@ -1139,6 +1131,19 @@ When kbuild executes, the following steps are followed (roughly):
resulting in the target file being recompiled for no
obvious reason.
objcopy
Copy binary. Uses OBJCOPYFLAGS usually specified in
arch/$(ARCH)/Makefile.
OBJCOPYFLAGS_$@ may be used to set additional options.
gzip
Compress target. Use maximum compression to compress target.
Example:
#arch/x86/boot/compressed/Makefile
$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
$(call if_changed,gzip)
dtc
Create flattened device tree blob object suitable for linking
into vmlinux. Device tree blobs linked into vmlinux are placed
@ -1219,7 +1224,7 @@ When kbuild executes, the following steps are followed (roughly):
that may be shared between individual architectures.
The recommended approach how to use a generic header file is
to list the file in the Kbuild file.
See "7.3 generic-y" for further info on syntax etc.
See "7.2 generic-y" for further info on syntax etc.
--- 6.11 Post-link pass
@ -1254,13 +1259,13 @@ A Kbuild file may be defined under arch/<arch>/include/uapi/asm/ and
arch/<arch>/include/asm/ to list asm files coming from asm-generic.
See subsequent chapter for the syntax of the Kbuild file.
--- 7.1 no-export-headers
--- 7.1 no-export-headers
no-export-headers is essentially used by include/uapi/linux/Kbuild to
avoid exporting specific headers (e.g. kvm.h) on architectures that do
not support it. It should be avoided as much as possible.
--- 7.2 generic-y
--- 7.2 generic-y
If an architecture uses a verbatim copy of a header from
include/asm-generic then this is listed in the file
@ -1287,7 +1292,7 @@ See subsequent chapter for the syntax of the Kbuild file.
Example: termios.h
#include <asm-generic/termios.h>
--- 7.3 generated-y
--- 7.3 generated-y
If an architecture generates other header files alongside generic-y
wrappers, generated-y specifies them.
@ -1299,7 +1304,7 @@ See subsequent chapter for the syntax of the Kbuild file.
#arch/x86/include/asm/Kbuild
generated-y += syscalls_32.h
--- 7.5 mandatory-y
--- 7.4 mandatory-y
mandatory-y is essentially used by include/uapi/asm-generic/Kbuild.asm
to define the minimum set of headers that must be exported in