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-rw-r--r--Documentation/kbuild/kbuild.txt29
1 files changed, 15 insertions, 14 deletions
diff --git a/Documentation/kbuild/kbuild.txt b/Documentation/kbuild/kbuild.txt
index 923f9ddee8f6..f3355b6812df 100644
--- a/Documentation/kbuild/kbuild.txt
+++ b/Documentation/kbuild/kbuild.txt
@@ -3,7 +3,7 @@ Environment variables
3KCPPFLAGS 3KCPPFLAGS
4-------------------------------------------------- 4--------------------------------------------------
5Additional options to pass when preprocessing. The preprocessing options 5Additional options to pass when preprocessing. The preprocessing options
6will be used in all cases where kbuild do preprocessing including 6will be used in all cases where kbuild does preprocessing including
7building C files and assembler files. 7building C files and assembler files.
8 8
9KAFLAGS 9KAFLAGS
@@ -16,7 +16,7 @@ Additional options to the C compiler.
16 16
17KBUILD_VERBOSE 17KBUILD_VERBOSE
18-------------------------------------------------- 18--------------------------------------------------
19Set the kbuild verbosity. Can be assinged same values as "V=...". 19Set the kbuild verbosity. Can be assigned same values as "V=...".
20See make help for the full list. 20See make help for the full list.
21Setting "V=..." takes precedence over KBUILD_VERBOSE. 21Setting "V=..." takes precedence over KBUILD_VERBOSE.
22 22
@@ -35,14 +35,14 @@ KBUILD_OUTPUT
35-------------------------------------------------- 35--------------------------------------------------
36Specify the output directory when building the kernel. 36Specify the output directory when building the kernel.
37The output directory can also be specificed using "O=...". 37The output directory can also be specificed using "O=...".
38Setting "O=..." takes precedence over KBUILD_OUTPUT 38Setting "O=..." takes precedence over KBUILD_OUTPUT.
39 39
40ARCH 40ARCH
41-------------------------------------------------- 41--------------------------------------------------
42Set ARCH to the architecture to be built. 42Set ARCH to the architecture to be built.
43In most cases the name of the architecture is the same as the 43In most cases the name of the architecture is the same as the
44directory name found in the arch/ directory. 44directory name found in the arch/ directory.
45But some architectures suach as x86 and sparc has aliases. 45But some architectures such as x86 and sparc have aliases.
46x86: i386 for 32 bit, x86_64 for 64 bit 46x86: i386 for 32 bit, x86_64 for 64 bit
47sparc: sparc for 32 bit, sparc64 for 64 bit 47sparc: sparc for 32 bit, sparc64 for 64 bit
48 48
@@ -63,7 +63,7 @@ CF is often used on the command-line like this:
63INSTALL_PATH 63INSTALL_PATH
64-------------------------------------------------- 64--------------------------------------------------
65INSTALL_PATH specifies where to place the updated kernel and system map 65INSTALL_PATH specifies where to place the updated kernel and system map
66images. Default is /boot, but you can set it to other values 66images. Default is /boot, but you can set it to other values.
67 67
68 68
69MODLIB 69MODLIB
@@ -90,7 +90,7 @@ INSTALL_MOD_STRIP will used as the options to the strip command.
90 90
91INSTALL_FW_PATH 91INSTALL_FW_PATH
92-------------------------------------------------- 92--------------------------------------------------
93INSTALL_FW_PATH specify where to install the firmware blobs. 93INSTALL_FW_PATH specifies where to install the firmware blobs.
94The default value is: 94The default value is:
95 95
96 $(INSTALL_MOD_PATH)/lib/firmware 96 $(INSTALL_MOD_PATH)/lib/firmware
@@ -99,7 +99,7 @@ The value can be overridden in which case the default value is ignored.
99 99
100INSTALL_HDR_PATH 100INSTALL_HDR_PATH
101-------------------------------------------------- 101--------------------------------------------------
102INSTALL_HDR_PATH specify where to install user space headers when 102INSTALL_HDR_PATH specifies where to install user space headers when
103executing "make headers_*". 103executing "make headers_*".
104The default value is: 104The default value is:
105 105
@@ -112,22 +112,23 @@ The value can be overridden in which case the default value is ignored.
112 112
113KBUILD_MODPOST_WARN 113KBUILD_MODPOST_WARN
114-------------------------------------------------- 114--------------------------------------------------
115KBUILD_MODPOST_WARN can be set to avoid error out in case of undefined 115KBUILD_MODPOST_WARN can be set to avoid errors in case of undefined
116symbols in the final module linking stage. 116symbols in the final module linking stage. It changes such errors
117into warnings.
117 118
118KBUILD_MODPOST_FINAL 119KBUILD_MODPOST_NOFINAL
119-------------------------------------------------- 120--------------------------------------------------
120KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. 121KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules.
121This is solely usefull to speed up test compiles. 122This is solely useful to speed up test compiles.
122 123
123KBUILD_EXTRA_SYMBOLS 124KBUILD_EXTRA_SYMBOLS
124-------------------------------------------------- 125--------------------------------------------------
125For modules use symbols from another modules. 126For modules that use symbols from other modules.
126See more details in modules.txt. 127See more details in modules.txt.
127 128
128ALLSOURCE_ARCHS 129ALLSOURCE_ARCHS
129-------------------------------------------------- 130--------------------------------------------------
130For tags/TAGS/cscope targets, you can specify more than one archs 131For tags/TAGS/cscope targets, you can specify more than one arch
131to be included in the databases, separated by blankspace. e.g. 132to be included in the databases, separated by blank space. E.g.:
132 133
133 $ make ALLSOURCE_ARCHS="x86 mips arm" tags 134 $ make ALLSOURCE_ARCHS="x86 mips arm" tags