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0 j9 D" a8 b5 m3 h0 p# Hmake menuconfig 是执行makefile里面的menuconfig目标.: h( K: ?% P+ T6 \; a% g$ F
如果后面ARCH =ARM CROSS_COMPILE=arm-linux-的话表明： 编译出来的目标是针对ARM体系结构的。因为是针对ARM体系结构，所以需要使用交叉编译器。使用CROSS_COMPILE=xxx来指定交叉编译器。- b. L0 B) N1 u5 U! {) t
CROSS_COMPILE=arm-linux- 意思是制定交叉编译器为arm-linux-XXX。 如：makefile里面会指定CC为arm-linux-gcc。9 V& \& E. ]8 [( y1 r- P
5 J3 o& h6 o8 w3 m* |; D" X
5 Z2 \4 Q7 [/ M+ e
' z5 f1 V* J8 i! \/ o6 k, f
为了使make命令执行并行处理，-j 选项可以用来指定作业数。
5 G& o1 u! V0 R- j
1 I5 Q @, L' V9 n$ make -j4 ! V. b0 G. v/ W5 ~; X
( J9 \- s/ O5 [/ @, `/ F+ v作业数是在编译的时候指定主机的CPU个数，所以在脚本中写成一个常量很糟糕。（特别是把编译脚本给其他人的时候。）并行处理的作业数和编译的效率直接相关，所以需要设置合适的作业数量。
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+ V+ O8 R+ r; b/ f昨天的文章中在编译peRF时，make的任务数能自动设置成CPU的数量。调查了一下它是怎么做的。
" `4 P9 \6 i: u# D
4 v8 z( X% a0 H. `2 Slinux/tools/perf/Makefile1 M4 y, O' A: m. y, n+ h
* W8 W. ^0 O% q( `
#) ^$ `# h$ [8 R% ^( o
# Do a parallel build with multiple jobs, based on the number of CPUs online
+ ]0 N* ~/ T; [' A9 X$ ]/ [5 }# in this system: 'make -j8' on a 8-CPU system, etc., G9 C7 @" T' n8 O8 m3 r! K
#
; @8 z& h2 P. b0 p# (To override it, run 'make JOBS=1' and similar.)
- ]1 S/ H/ l3 |( f0 K#2 ^3 ^8 S' L) s/ e0 ^
ifeq ($(JOBS),)$ h5 V/ i! q5 G& f6 B& \6 B
JOBS := $(shell grep -c ^processor /proc/cpuinfo 2>/dev/null)
$ d" a! U/ c& p3 z) b/ P6 w; H ifeq ($(JOBS),)3 ]- r7 b: u# f+ Z
JOBS := 13 H1 {5 H# P8 {, g4 ~/ n
endif
& c4 b: ?" |. W: t9 g) kendif. _3 Y* [# k" U! W# y
这种计算了/proc/cpuinfo以processor开头的行的数量。; k- F* g" y+ i: ^7 m
0 m1 n5 g7 P& v3 q
这里不使用wc命令来计算匹配的行数，而是用grep -c来获取。
5 k% A4 }9 g1 j: \& a' m4 k. F! i+ D: ?* ~$ @# F
这里JOBS是CPU的个数，用这个变量在子进程中使用make命令。
! x" h$ B1 w% p4 m2 a$ {8 T# e5 p1 f# P( I
$(MAKE) -f Makefile.perf --no-print-directory -j$(JOBS) O=$(FULL_O) $(SET_DEBUG) $@) I, W1 `. q7 n) a [: {
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5 t! M" y+ M8 m5 E, }9 }4 S+ O. e' J
- r* o! A* p6 ^! `- G e关于make时，通过-j参数指定多线程数目
- ]+ s& p6 w/ @) n2 H, _- d7 | x5 m* i1 Y! |' Z% q' G+ o
之前在折腾crosstool-ng： `3 X+ R& K% @# Q3 d
2 F4 W7 L4 z, x9 v0 W【记录】crosstool为xscale编译(ct-ng build)过程
+ s5 U5 S9 l1 N L6 M% n; y5 U4 M9 w
时，就偶尔看到别人用' u' _$ R5 N L: T4 W
* Y' v) |+ S) n- F& L3 t
ct-ng build.4
5 K- i. `! ]6 E0 W0 n( k7 z7 J0 Q; i& m! A' B0 m1 c
意思是多线程去编译
5 u4 ~# J6 U4 I6 _1 B1 Q! v) ]9 `4 f& Q
估计底层就是调用的makefile的支持多线程的这个功能。
Q- ?# Z) _7 d0 e2 u, l4 ^
1 ?& H# k# k" ]/ B5 ?后来又在别处看到类似的写法了：
4 }! m+ `1 M. j; e5 K& h5 r; u9 \# C
Introduction to Cross Compilation
3 ?7 a2 @' W l/ {: C: g
* P' k* G: N) y' i% h中的：
, F3 M- }/ O; m
* b% b" j8 u7 J! G+ ~0 @( I4 D1 make
8 x; r- g0 _3 r' x# M( J9 X- ARCH=arm
- CROSS_COMPILE=arm-linux-gnueabi- uImage -j46 y O; T+ ]: R! g8 A
- a% x; N9 n2 A* H
/ p. R( d- w. }% ^* z( ~4 v此时，才想到，去查查make的参数：
$ Z& _/ c3 f3 T1 N; b" j( m+ f$ L7 D* g5 c% V
（此处是在cygwin中）
! B2 a b; |2 Q9 e8 M- o9 T4 Q, b0 D$ b5 c" p! \, r
) b9 l, }4 e( \3 LAdministrator@PC-20130611GART
$ J+ ^+ J$ G' `* J/cygdrive/e/Dev_Root
& y- ]) [5 S$ q& b9 c$
t: e3 D2 d1 t; ^% F! B/ s7 Cmake
2 N4 v" S2 ?5 p6 [ 4 U8 f2 M( h' J" q) y) V* ?
--help
" y4 {; J R0 T3 R: V% S) DUsage:% R8 O/ T0 x$ u. ~' N. O7 ?9 {
make9 |8 I% P4 F) @$ N& N) M; L
* i0 h- ]4 a/ y/ t[options]
$ p: y* Y8 I8 n5 i/ T& _; ~[target] ...& U* ^! }, p- D- k) V! ?
Options:
1 ~/ Z' k z6 c8 m
9 a* g% c1 [0 ?8 S* s/ K2 A-b,! {, L$ p+ G4 B
-m Ignored
! [* A# h# b- ]8 Q1 y: n9 Afor: [$ F# s1 @) _
3 N1 ~! W! Y* }/ l) K5 C# M
compatibility.& B7 h) e# v/ {- `6 i* h
8 o+ A8 `3 v" S" [3 L6 v+ s
-B,
' i2 J' R& l6 \( _--always-
/ N/ q0 l1 X5 x$ r( C$ d* H) smake: ]/ U1 J0 H* H
. @* ?# I5 F6 P+ w$ CUnconditionally* L/ F" }' G$ m9 L& w
make# Y1 Q5 o) ?) j- n# |: P8 ~
8 A: u3 `% y! e8 S4 wall
2 q p, ^# ?* z( htargets.) m) L3 W3 p. x: _" [( W
! t {$ S3 W7 U+ P" a4 [-C- c1 j) s% t3 F2 k
DIRECTORY, --directory=DIRECTORY
3 J) u( {3 }9 ], L4 s/ }- w
: T! Z) F8 Z z8 Q$ ~Change
0 L" |$ R" y0 N/ }to DIRECTORY before doing anything.- h* X: i0 p' B$ m" p
! V' L2 t8 n2 ~# Q" {9 v-d
. G e- ]4 l2 APrint lots of debugging information.
, L8 k7 r9 w. V5 q( X" f4 \* ` 6 X# I3 Q! d0 N, j/ J
--debug[=FLAGS]
0 {. m8 z: g0 | ]6 `1 ZPrint various types of debugging information.7 N: X+ E' c+ V* \9 `
! G* u# t. L0 b7 A& k-e,
' h4 j) y0 v0 g) H; `' h D, C--environment-overrides
# R! x. C8 o0 @$ m& B9 f3 \
& i1 k) ?+ I: ZEnvironment
. D3 a% G& v S0 v3 t: x* o( b/ xvariables override makefiles.+ w2 b1 a+ K$ f9 P6 v' D, D! s
% n( t0 j8 r6 n2 K) |3 p: n--
) l/ d g. ?1 w7 C5 Deval
) S. c A5 Q+ V" {( X% o3 @=STRING 7 Q2 `. D& p& }$ u& g! Y
Evaluate STRING as a makefile statement.: N* x: x- d5 P% s
9 y/ _$ p2 S% W3 L& J5 p$ ]. P9 x7 U) n-f* N" m" j) L( r# M& w: G5 W
FILE, --
5 ` r( O. b/ i, x8 N$ K& Gfile
# M+ [0 a& _8 Z0 k d: z( g* b=FILE,
9 i3 c; E' D$ [, U$ c8 B4 G--makefile=FILE( H* @6 U& O$ Y
7 \0 h+ w, G0 ]% R* H
Read
4 o) ]% A% i3 G2 ?. s& nFILE as a makefile.
- T, G! d/ i. i7 R! z $ Z" e" w# x' V% p. U: Z
-h,
% y8 p4 n5 ~, ^9 t--help Print this message and
3 p6 B" Y' {2 a5 U7 v. w% Q! Cexit- Z+ {1 W$ @! W/ _* P8 N
./ j# P0 ~" N, s( ~8 r1 K. j
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--ignore-errors Ignore errors from recipes.
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9 K6 b/ k1 X* j- g/ o. I/ y1 l-I; j" G4 w! ^! I% F% J
DIRECTORY, --include-
) B$ d" r) e6 X! J4 pdir
- B/ s ]% f2 ^3 `0 [" s& g=DIRECTORY8 D( |7 m: `5 g
% Z) c/ s* `9 H
Search' f) q- Z0 n3 c
DIRECTORY
" Z* X/ B0 V! `( m& R' R) yfor
) G9 S/ m! o. s. D6 l* {, \ " g" b Q' e7 v4 p% f+ b( Y( Q/ E4 L, A
included% _, ^! _% x) Y) v- D
makefiles.
7 ?+ V3 I& g1 |( r9 l& M
3 N' N' J9 e3 u% a+ j-j
3 q8 t) h2 D, O# m7 {# g[N], --jobs[=N] Allow N jobs at once; infinite jobs with no arg.2 x% @1 _" }$ X: a5 S: u9 q3 o' O
- ~, h0 y3 U( u+ _* ~ c4 b* ^-k,
' @) _* l: ]7 Q8 [5 B--keep-going Keep going when some targets can't be made.0 ~1 v9 D2 }- M
# A- Z4 N$ A% j3 p* \-l. o! F+ f- L0 V. C6 w
[N], --load-average[=N], --max-load[=N]1 Z' i- n# _0 D& @% L) `
2 `4 J8 \) z) {; c; S' n5 L. UDon't( b U8 J: i' |2 k; v7 r1 [ b. V% t
start multiple jobs unless load is below N.+ X( i3 _7 A ~2 t4 P' v
6 X! Q4 b( g2 q, X+ N" l% [( K-L,
& ~+ c1 l |, |9 |$ i* K--check-5 f& }: Q) U( W9 x4 N9 B
symlink+ A) p+ g- j/ r; l( d/ g. c
-
4 Z5 F$ S: x' F8 w& @times; U' q& S: W' T1 I* }( ?
4 s! C ?& k8 Q- tUse6 I; D$ ~( _$ Y. K) g
the latest mtime between symlinks and target.6 k& k! O8 {# _
6 y9 e' f3 L2 N1 L& P! j-n,
4 F' }5 Z, O8 v--just-print, --dry-run, --recon- a( j9 V1 s! }) ~5 J" @
$ C* ^# h M S1 {
Don't$ l6 s+ |0 M4 S3 `' o5 i
actually run any recipe; just print them.
; r, b# N* F* k
2 M) [' K M0 n# F! _/ _( d: j-o
& K3 p% s M$ H' v1 q$ z+ F+ uFILE, --old-9 {' y2 C, B$ X/ ^/ c; a1 E! |
file
. z8 g) a3 P* Z s3 q=FILE,$ y' @' X3 A4 [9 W+ I- C
--assume-old=FILE
+ P; T; o, X5 h3 D! v
; K, c; y$ U' ~$ IConsider! ]$ @7 L" G' ~+ A$ B5 y6 q+ Z
FILE to be very old and don't remake it.0 ] X5 b7 C8 H) r' S
a( v2 I+ I# {$ [
-p,
2 c& M$ O2 }4 E2 x0 b6 o--print-data-base Print; v+ Y1 H7 L# e& Q2 n$ {5 V( p
make7 [ ?) y' X! t* O) A0 E% X; ?
's2 E: S' p3 P% t! c0 k
internal database.
0 |/ }2 {/ j) }8 o, B/ v. |
; _/ c# A" r* L3 o* c4 Y-q,4 H' f4 I4 H; P+ ^) C8 Y
--question Run no recipe;
1 @' f! Z' i) A" y' m% w% S9 iexit
. B6 Z5 \' b# J7 X- f1 \ ) k7 p5 ~! D, y' `8 l2 j
status6 P; V; P* }$ I9 q. _* N% e6 l" k
says
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Y' ]/ L& r/ V* K$ E
up, V, H4 c1 m6 ]: [! }
to4 w) P9 {$ a( e' E& }
date
4 C9 j1 P$ {, a2 R- f l) K., e# D7 f, y) k
_) X" R; s3 w7 i) w6 f
-r,. c, ]+ L# O3 N9 \2 t
--no-
: x7 T Z* c) Ubuiltin
. l1 U5 ~* M$ o5 i7 z: D0 `9 \& ?, D1 D-rules 7 o0 Z9 q+ r4 r# P& q+ S
Disable the built-
$ ], L7 W4 P( _; B) N9 qin5 v# h# C1 p+ q- y
7 Y3 B1 a5 v% D, v1 b
implicit/ M1 ?6 i3 ~4 @ i" e8 L
rules.; X$ I$ |, q7 [
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-R,
- b& g4 e7 Z6 S3 A. s--no-; Z" {' A3 T9 ~: J6 O
builtin
( k8 t3 ^5 k1 C# _3 K-variables 8 Q' q8 \/ a) P: e
Disable the built-
; D8 Q7 c1 W3 ain7 h8 u I' K" d1 |
6 p2 o4 U2 x8 n+ P! w6 d: ivariable! w( B2 ]8 r# u0 G
settings.6 A% \7 Y3 L- |
* Q; A- \" Q* ]7 H" m5 U* P
-s,
4 x/ @+ b+ V) f5 Q$ C( y- y--silent, --quiet Don't1 k) t6 F+ c9 V. ?' y8 u5 {5 Y# P. z
echo5 _ N b4 _2 N3 |0 P! p. i o
* r" B: ]: B) X; L, M) w0 q( M3 E
recipes.* H3 Z8 G! g4 b1 `- l5 }# S" d. P6 \: M
+ V5 W4 R) k9 i-S,
4 U$ H0 g f0 v. M6 W--no-keep-going, --stop& X9 s9 ?) |# T9 o1 V% ?
4 v$ U- \$ L+ k _) A
Turns9 z3 W7 f, n+ I( V
off -k.
: J# }- c0 n; ^1 {6 S3 s
9 C4 p3 O, n! x# U' M-t,
( d/ o4 O. V7 c, F# u--
9 x! A+ o! l2 a0 H: }touch
# i, s" K: N& n8 ?# ~9 h # A8 X2 U' z" z7 x" c" }; `/ H/ u
Touch
0 B" e' C5 U6 N( ztargets instead of remaking them.
. ^( S6 }) Y1 ?( E% L; C ; s2 b( T) b$ W3 n/ C
--trace
; F* O! ?/ i6 ^7 i3 h9 sPrint tracing information.
" p- l: u% A9 c0 R) X : W8 I- d- ?' k4 D% ~$ d2 y U
-; o& m6 a, {6 K! j1 G
v/ |/ b* l3 O' P1 O) g
,* M/ k6 s0 T$ u) ] h3 B& ^: `
--version Print the version number of2 S4 K. {/ V2 o
make% |4 q, J* M5 u6 [' T V# w. R8 z
" b+ D' l+ E( p
and
1 T! F. S9 Y4 A! w% z2 d0 Gexit7 m; t# O' c! u. i2 ^
.
( B; U$ i% t9 ? a) {' n7 i * z% \3 t7 K% x. [& Q& H9 ~6 `7 B
-w,3 |; C1 E$ Y4 p, Y
--print-directory Print the current directory.5 w; S4 Y9 H0 |' E/ O
# F W; [6 q" }7 U( L0 Y--no-print-directory ! z P. {$ X; Q6 z5 x
Turn off -w, even: ~0 G! N. p* ]) _; f
if, F0 b8 R8 T, f$ \9 Q" x" k
" W; {, l" k5 z: T( C8 {9 Oit
: B5 _& N+ t, c3 E+ l A' v% e3 Cwas turned on implicitly.
5 o2 p3 X1 N$ x$ u ) I m) g+ J* |3 Q
-W. x- D% u6 F, B# k
FILE, --what-
1 M) S7 F. ?% \6 y) [if& r7 [/ J3 K- y) H3 Z! T0 d, ?
=FILE,
- O. M0 }& b# B5 M$ P--new-9 w1 f) Z' p" z& I3 T
file
6 M; y2 @9 R/ H=FILE,
7 P# K+ A. \) H1 {: r9 v$ Y9 D--assume-new=FILE
1 b' ^1 S) z: ], S9 W' M/ o/ V ( j b9 G0 y$ K* g B i4 [
Consider
] @: Q5 Z# ?, \FILE to be infinitely new.
v- F4 u9 `+ j
9 v4 E5 j# D; z- G--warn-undefined-variables
% L. u9 p& E" g8 q, k4 J/ IWarn when an undefined variable is referenced.) x3 i/ c: O$ x* }6 d1 S
; M* n1 L3 l2 o
This
6 C P. f* R0 F. dprogram built2 Y/ X: I+ c$ S# J; W
for
6 I8 F8 c8 x/ Y5 B: l. Y8 B 8 {3 Q4 E0 q$ b% O
i686-pc-cygwin# d- X8 l1 ?" \ _( [
Report8 V, u% o. U2 z9 _2 r* G" L
bugs to <bug-
2 B) V1 |! S3 pmake
$ e% J6 L/ {0 [% Z; ?: x; ]/ Z@gnu.org>' e: d! G8 H! i b
, h7 O. f9 c; A, L" G$ T4 n8 D
Administrator@PC-20130611GART
0 d, i# w w& Y5 r3 |$ d" X5 O/cygdrive/e/Dev_Root
6 O; [" b5 e! }" B' @* v5 a$% C" h) J K8 a& {% T7 g) x7 d
% w+ u _. {* Q0 r' W% y9 {$ H+ \# o: W x5 u# K6 y
1 A$ H1 h4 i. {# r2 n6 _* ^! J, a; ?- j- r3 B! E" G/ l
- L! o" Z0 _. }: I8 k6 e. w
果然对应的-j==–jobs，指的是多线程的意思：: s+ H. m. B' B$ C5 `) J
1 m4 d: F6 c$ L7 s% I. T
-j( U) p+ Y0 Z: G: G' ~6 Z; v* ?
[N], –jobs[=N] Allow N jobs at once; infinite jobs with no arg.5 |! o" S: F5 F) y) r8 N
. j, S( [2 A6 c% X# ^# |
, s+ P3 b7 ^1 r& C6 U/ w4 [3 V$ ?2 R2 L
" N& S9 t$ F' B用法即：
: s* s* f2 ~% J) O4 |" I% E
4 o4 M( i& b8 \) k- m1 make
. c4 k$ J/ O& O2 V' T- –j
- 4
3 f% d4 ?4 a* _5 g. Q; d
/ k' M1 O' A! n1 S. S; H' T, A7 y# y0 {! x; k& H& e) ^
或
' ~5 u0 V' J$ `" e$ v" f" W
# p6 o, _* v$ C/ ?, D% C1 make& G. V' T! o, B
- –jobs=4
( O8 d% u, q5 R$ g4 a9 ~. S
( R! z9 B7 ^6 W6 g0 j: F; r
/ _; ~% b* _% v
make加上-s，表示silent，不输出详细log信息
% O& M- ]5 [! A2 S9 h9 c+ _7 O$ l7 r2 N5 p$ E x
之前折腾：
5 K: O2 {' w5 w& U
5 `: i9 v2 ]/ U. `8 W【记录】尝试用QEMU模拟ARM开发板去加载并运行Uboot，kernel，rootfs, C$ F# j8 M+ k9 \3 \
% V) d7 r, N3 p" h参考的：
7 C. J& ^3 }) q; k9 F3 ?2 T
2 d2 j* H/ _1 zVirtual Development Board
q' d) `9 p' {- u8 f
. X% ^& Q* \. r$ ?# t中就用到：
. d6 P) x! S% K. X9 W3 U1 d
; `( n) y, j' g& l) _: b- sudo
- make
$ Z( X- p0 ~& R$ Q8 p' }! I
0 {( S' R5 R: yinstall9 `) c/ k8 i) L* s1 L* h3 m
6 b; j) _) U2 w-s
, g3 o" q8 O7 R% Rmake
: a2 `* ~) i2 C- @ [8 E ; c8 P% ~% s) f1 `# P
ARCH=arm! g$ ?* ^5 U4 [! m5 l) |
CROSS_COMPILE=arm-none-linux-gnueabi- versatile_defconfig -s7 A% z# p! P( Z8 v$ C: h
make
' o4 U) x w M: z; X
9 a/ s; {9 N4 A# M# b3 C& WARCH=arm# j3 u8 C/ R; c3 E; l. v
CROSS_COMPILE=arm-none-linux-gnueabi- uImage -s
; \8 D1 i& @$ o4 L) ^1 i4 T6 I
' T, @: N6 _& \, y9 Z, c7 ~9 K1 j5 e- f4 L7 A) O" z* U# I8 N1 Y4 M
?2 V1 i6 Q' R: }! d
: M! v* Z9 V& ~- d7 I S1 R t# Q# {) X8 O1 }/ Y
其中的-s参数，之前就猜测是silent的意思。
: `' e: F( L# B) J5 A' V2 H' B, C6 D3 W" e4 U
根本上面的–help输出的信息，果然是：( X! W. N! ~/ b" ]
! R2 b. X6 a6 i6 H-s,
9 I3 ]9 [$ W8 l t" v6 A –silent, –quiet Don’t echo recipes.
* p- }. l, H7 ]4 K- v# ^ J/ A 5 t0 C4 f8 k3 V1 Z0 K0 v- l
: X, o2 P! \% N }4 y9 e3 X$ O5 @
# ]) `( F0 Z% e. ~8 d
-f指定makefile文件2 \3 _: [1 m0 i8 D
. B7 j3 U& ?# e之前就知道的，可以通过-f指定特定的makefile文件的。& X( z& ^1 `, @- M
" Q, c4 ?- c$ X# O1 ~( }; c背景是：/ s3 r3 \7 W2 p4 F# A1 i: v
+ @# I' ?- p% \) D9 f2 l# `
当执行make时，默认会去（当前文件夹下）找名为Makefile的文件$ X k* T3 ?; S& r1 S% T7 J
" O/ v& I0 R$ A' M K% o如果此处你需要去运行特定文件名的makefile文件，比如my.mk7 F0 f/ U0 `1 U% z6 z: P! n& L8 P
: m; P4 N; j, ]0 ~ m2 J& l# c那么就可以通过-f去指定：
7 j$ ~* y) a3 i- t! I( z9 H l% G8 x7 Y. Z0 E* O/ L
1 make
9 n1 A% i) T) K3 a4 @- –f
- my.mk U0 A" R: F6 h; ?/ c
' f/ O6 L5 d' ~' @6 F
& X: p" l: P1 F即可。% g2 B6 J9 U3 R* w( F ]7 ~
+ N' ]: F( @+ P( s) F0 `* V
2 o/ h: k: d6 H3 H5 T# @, X- \0 Q7 c+ j6 o- |
make help可以用来查看当前支持哪些目标
$ o0 D+ H& r9 K
4 _" J" _( J2 B一般来说，多数的makefile文件，除了最常见的make all，make clean等最常见的目标之外，往往都会有自己不同的目标供执行，即：
$ G! C, N, S! v% G
# V3 j6 H0 l1 {5 W) ?' i; {make xxx
- A' s) W: O: R( D
Y! J8 @& O8 P/ U! f$ Xmake yyy
2 M8 R# G" g- B; x8 B2 l2 u
( z. t2 i( H/ t9 @0 B4 M& V" A2 w等等。
5 C: Y" k4 d7 u% { g2 D5 h k" C* `: P* j4 \/ C. T9 E. u1 }8 g
而想要去查看，有哪些xxx和yyy供你使用，可以通过make help去查看。2 @+ {: B- h# Z- ]1 X
- p$ [) o# l+ F, k6 j1 }举例：
" h7 r. k6 y. y9 j# e9 w* w/ C8 e: J3 v; ^ G* k& t5 A
最近折腾的：' L; X& `/ a5 W0 Q" j& i
. h1 s/ v) q+ R, Q【记录】Ubuntu下为QEMU的arm平台交叉编译BusyBox" L* k3 R" Y+ ?! U, u b; P
# G1 V+ v0 F4 O$ W: m8 s, E
中的make help的输出，就是：
4 v# f6 f8 @" z/ v: z) O' V5 e; F% q/ k% c5 b# z! ^8 N
crifan@ubuntu:busybox-1.16.0$/ b P: g( A. k# Q' }
make, J( L5 m7 E9 E# S6 g5 a/ X
9 @. d# ~& o: m" u# g
help
. D, X" `8 j+ Q" j8 sCleaning:
& o/ W. `! S. Y1 h! S) x, d/ U3 C 2 b: T% f( q5 W2 w
clean
. G8 n% b4 q4 f; c" Y+ H- delete temporary files created by build& Q# V6 }. j4 c1 `% M
6 k% q1 j* A6 s& m% R
distclean
/ i% `8 e* W) V, _" c5 J6 h n8 v% B8 _- delete all non-
) c/ ?! o0 j1 Z. z$ z9 wsource
5 f4 p) |/ W5 s* d) J 0 e' ]" G5 a0 d" v4 |
files
' { {) f, J9 q# C8 A(including .config), D% }1 |& K$ Z! Y8 f2 v/ v
: U, D6 p' Q" y) Y0 Z
doc-clean 1 x& M- `6 i' A, B" d |
- delete all generated documentation
! `8 P8 I& g1 A& W0 n
6 w: a/ {9 q, t# \4 h
4 A3 r( c% ]) Y% F, gBuild:& m- x% g P5 C; a8 U
4 y( y* \ o+ b4 n5 m' z8 M0 o
all
) z0 W/ s& B$ w5 M. F5 q- Executable and documentation, r, w% ?1 o$ M. G: R! f! g( |
. Y8 e5 _" R8 ]* i5 @. X$ l3 ~9 Tbusybox
7 w# O, m+ ~% M# a- the swiss-army executable
, V# _$ y6 Y5 e. V * N0 ~* q6 `0 f# V
doc + G1 Z/ r0 I6 X/ _4 g1 N
- docs. S8 H" C6 w+ K4 a1 u( m& n
/BusyBox- w: q3 R- [$ R6 A( \
.{txt,html,1}/ b1 d+ q6 L1 y3 {7 ]+ _( \
/ t- ?2 k5 r# ^$ N7 G1 M- a
html
1 r. }9 K- i% A- create html-based cross-reference
! S% b! r+ o/ G# f
2 Y/ h9 E) d+ G* s( o$ W
2 r, M: P5 m2 @) B5 M; XConfiguration:
* g+ v' G% a# @" E) M+ b$ T 4 G! o) Q* x2 [& A) \
allnoconfig ' }# J+ s/ Y+ ]5 U5 V/ t* m
- disable all symbols+ b; R5 T' D' |$ U4 I% e/ b. a
in1 F+ Q/ {' N4 a3 S# [' |
& P4 h; F) y6 R N.config& O" H- @0 F9 ^8 q( n! C' S; @0 D
) \; E! h6 |; M6 u! B
allyesconfig
/ k2 g' ~) l- \; m6 ^; M( C-
2 B1 E. O, t# o3 h4 p1 Uenable
Y* ~& X% ?; n; e* F3 `
, h. M D# E1 T4 S$ oall
! l- S) L& J8 ?: r: {symbols% c& M; f0 d$ s+ r$ E$ P, Y5 a
in) x# n$ I8 b- W# ~1 J
) r4 m+ ~- Z" u9 A: q1 n
.config0 i7 H: ?( y! U- p5 q% D
(see defconfig)# W7 o9 q. Y- ^$ x( x( I
. r" X) R0 G3 q. S
config
: T# q( N( s, {* z) m, @5 t) O- text based configurator (of last resort)9 B" a0 K- S: @7 h# k6 Q
# z: z( i6 x( Q# E
defconfig
; ~4 H: D( i6 v7 ^% d, c! w-4 b" L' ~+ T. h/ G: x
set: Y" [, ?; r H( @1 w" D
; c9 C) I) n& G. `
.config5 u( A- i9 j1 c+ J
to largest generic configuration/ g$ `1 \3 i- h4 h/ N; t( Q8 [
( u0 a1 }4 K, U ^, E3 L# O. Ymenuconfig
6 k; N% C' E( j/ n1 E. y- interactive curses-based configurator
5 v/ @9 U- o8 W% R7 b. S
- K: w; Y5 {9 A Qoldconfig ! J4 {/ ]* q- |/ Y) _! C
- resolve any unresolved symbols5 `0 W, d9 l0 ]5 y% o
in
0 D2 r! `6 Q$ y W$ R$ s 6 V D! M2 R- p
.config4 u4 _/ ~! F8 {' N5 b
* R2 H( A4 h: N3 @% Fhosttools e, L8 @& f1 `9 W1 H
- build* w% m/ p1 f; t+ [
sed
; J d8 r; X) R% N / d `8 h7 p6 Z
for
2 f. D. M1 V3 J3 l8 W1 \* l ; o g, ]0 j* j0 r8 _3 q
the e6 m; Q& C& F; Y, v
host.
( ]& q$ x3 g3 j8 _3 e/ n( ?2 V
# ]: S" \. @% Q) o% RYou8 j" f8 F8 [+ R9 L X* Y
can use these commands
- k: }$ B, v: R7 U" b3 u- p. w S0 Eif
. c* x: a# v* U( i/ ~
6 g' O; o: @9 y h/ h& Athe
2 s. F' j; M l4 Scommands on the host
1 E* t0 D$ g0 H1 e
, Z7 T9 ~1 ]$ @/ `8 v3 Lis4 h/ J. r8 ?9 [8 D! y
unusable. Afterwards use it like:! ]7 R9 P/ e4 m6 ]3 C& d; ?
G. o7 ~" |+ X. O2 e. B! E& Emake. R; s. C: s& E
4 i4 r* _4 c& J: X( o) T9 D( l
SED=3 U4 D9 P! B: Y$ A3 I* z4 j
"/home/crifan/develop/embedded/qemu/rootfs/busybox/busybox-1.16.0/sed"1 [: ~' j3 @5 l6 g2 j% i
! i/ N/ b1 q5 z- n2 f$ p
3 Y6 e1 P; J5 JInstallation: [6 J a& |) U* A# p, Q8 A
7 J8 n6 s: C9 \# Cinstall% [! D9 Z! Q6 o# B9 r
3 L& ~; [. F. f) b9 F! p# E7 i7 p
-& }. _5 K* o( F. R$ J
install& a6 Y! F8 o, f2 E- ]# W% V
( Z7 f- t J/ k# C) a' e4 T2 vbusybox
a' [1 r% T3 Z6 Z' Vinto CONFIG_PREFIX& U+ y; M; M# g( {
3 Q( G: i7 b" Yuninstall: m/ j' i; s) E, a* m+ z2 m
! @7 T: k0 l1 a7 p+ q
* U) A2 ~& o% \3 f
Development:
9 r# q8 p) m# y N
: i, w6 \% ?$ E* ?5 L3 abaseline
: U+ P- l- x! I/ u; J6 J- create busybox_old6 N2 x, q0 T' C/ Z+ `7 r
for
& k" p) F& \+ u; f1 x; n
+ u7 R2 p5 J6 Obloatcheck. E Q$ e& k( I: W
& W- ^9 R- J7 T+ ?- t5 \
bloatcheck ! q5 w* [) X3 @; ]
- show size difference between old and new versions' R/ v0 z m7 U
. R+ O3 Y) E$ o: h5 }, Z' icheck m! f6 P ~% z" u/ p
- run the1 D( i0 L5 T+ @4 G: a* f% {3 b
test
& u( ]3 V: N) P n. l) B & v. [9 T: a6 h' V+ k4 t' v7 [( s
suite
- Z* P5 G% [' |6 | ?3 x# jfor+ ^0 b0 i: U% O7 Q
+ P. u" k Z. u7 F
all
, y/ e2 o9 A( S( Gapplets
8 u2 W; Q- g6 k5 r$ ^2 L1 f/ _ / t0 k5 @" ?$ H. E
checkhelp
0 E0 R( |& ~- I4 h9 c8 {3 \- check
! t; H4 b& c; D/ B1 Z* W' y8 gfor
# _$ z" V; `6 U7 z! O8 O 3 I$ o6 b& W6 Q6 ]6 M! P
missing
1 D6 E1 ^9 f. v" }; Shelp-entries
& W) ?9 z# l0 I- q# t3 Jin2 h) o- E) r _7 X
5 c) Q( q; |3 K( q" lConfig.
! G; l; [/ W. h6 N- ~in" {8 ?1 |1 c( m: n+ ^0 Y) E
9 x7 Z. l0 D( a* H: B8 o; M9 ]0 g! h
randconfig ' [2 t# L9 v$ {0 ?
- generate a random configuration: B8 O+ y, r- L3 ^6 y8 r
( z, f' d3 m' b. N1 ^; B
release & q* r5 n. G& Q* R. ]+ ~1 M) c
- create a distribution tarball
5 | A6 }! q/ X$ ^2 w! p% q
& a i% |" ]: a S* O) b( Csizes
# D; Y( C7 ~$ y0 u! L& t- show size of all enabled busybox symbols
+ t6 l# {) }" h, M: D2 X- ]' Q
: J) i% w$ W& G/ `objsizes
0 F# f9 O! z$ [% {4 X- show size of each .o object built
+ U6 C& x0 @8 b+ B + P; K$ a) F+ I
bigdata
* ~% a* D: \6 M- ?- show data objects, biggest first
S; C3 D" F' A# X2 O) } : [' N# r6 \2 P# G' ]* T7 M" k" N
stksizes 8 }& U" r1 u- k
- show stack+ t1 Q: E+ b9 X2 E
users' w/ ?! i; I' g: M) t! f. `/ E
,' l( ]* {: h( x" D( Q
biggest first+ m5 G" ^2 \% Y! Z% d" P1 W8 w
3 _6 W( F# D: e/ H" M
2 T/ A, {, k S5 A& Q( e
8 S* ?7 @5 [) X如此，就知道了：. a$ a3 R- r! X- k: F$ y! `8 M" ]
! n$ R: B% s# n5 V3 n
8 E- r# f9 k1 y) o0 s当前的busybox的makefile中，支持如此多的目标，而想要查看当前busybox的各种stack信息，就可以去试试那个stksizes了：
: j# ~7 R' H" k% u7 J+ J" f; D. n( k& q: b' u! Z
crifan@ubuntu:busybox-1.16.0$* `' R- L. U5 S# J0 E$ E/ L( ]
make* ], C6 A. m. W
- c2 Z* Q/ K2 a: b. vARCH=arm
3 F6 }9 @: f3 H" yCROSS_COMPILE=arm-xscale-linux-gnueabi- stksizes
4 O0 G% N2 s+ Z2 t: W) T( ]2 b9 m! qarm-xscale-linux-gnueabi-objdump
; K6 ~. x: j6 M* I-d busybox_unstripped |" k6 [9 X' P5 X( z7 U7 R
/home/crifan/develop/embedded/qemu/rootfs/busybox/busybox-1# H1 p! X2 v' ~7 T9 ?" b& b- ?& q
.16.0
3 r) Y: C" a% | |- E1 A* f& X/scripts/checkstack
9 h$ J) E7 `0 P1 m, t.pl+ c: l* m' e- M! d K. @) s
arm |, F" s) W3 Z; h* h- c
uniq
$ x* H* d. ^1 ~; \* rbuffered_vfprintf8 N2 k1 o; ?+ {+ A
[busybox_unstripped]: 8384
7 q# R) g9 U; f3 W$ d4 t6 W" d, mphys_pages_info' v5 ?5 }, N6 H4 H/ V, M y* q
[busybox_unstripped]: 8192
/ |! @% M+ `6 l4 h5 z__get_nprocs0 Y+ G# ]$ C4 R- X
[busybox_unstripped]: 8192
" [0 \) T1 k* `, {! Z. ]9 c__res_vinit
6 D' e: e& D* m8 `[busybox_unstripped]: 8192
4 S' x7 O2 P5 j8 G8 v) R! E7 i_IO_wfile_seekoff- {' h0 J# y" `
[busybox_unstripped]: 4224% N/ L2 g( R( F4 ^
__unix_grantpt* s' n( U1 y! W( t! Z" U
[busybox_unstripped]: 42243 ] \" c7 K5 o1 f7 a! H& m y
_IO_vfwprintf5 }- \) H3 r5 T2 \% M1 W" W
[busybox_unstripped]: 4224
6 x6 A3 H; m; J( Y4 @4 T* j3 lgrantpt- f+ T. o, f' Y1 `: j9 P F
[busybox_unstripped]: 4160: R! o: j% P% i% Q; H! A2 M& m1 Y
bb_full_fd_action& r' U% Z$ w1 k3 V1 T, Z1 r
[busybox_unstripped]: 4096
1 c. a6 l1 @- N; g4 Tfind_list_entry2
4 y5 |8 ^5 b6 e* \6 ^6 W' l[busybox_unstripped]: 4096. U* e: a% h8 _( z/ K
readlink_main* i5 T- a7 J! L- Y" J+ V
[busybox_unstripped]: 4096
2 a$ Q A% ?! z3 z: w+ s* kpid_is_exec
9 u- u* P' j4 U7 J4 r; r[busybox_unstripped]: 4096 {. I! K5 T( U' C# \
execle
/ g, g% @: K# i! |: V; t2 b- S[busybox_unstripped]: 40961 e. e" q" J+ C) R* J/ F$ ]
execl
" F2 ~" V6 x* R0 r1 s[busybox_unstripped]: 4096
3 ^1 e1 d1 U. F/ u6 p2 qexeclp
7 _$ R( e! K; }/ r% a( R[busybox_unstripped]: 40965 X) h$ r6 O/ V3 |
_dl_get_origin3 S/ b; I. B! i4 G# x( J L% J" i8 c
[busybox_unstripped]: 4096
# y0 z- L4 |7 hipaddr_list_or_flush
) B" |: t; s' v% y[busybox_unstripped]: 3664+ d+ M, b& E7 ]+ c
iproute_list_or_flush; f. z! `0 S! m% O
[busybox_unstripped]: 3648
% x; m' {& A1 M4 G" W__c32 o: H; v1 N& R* r
[busybox_unstripped]: 3600' f$ ^6 o5 c$ ^& F2 E) F3 B: E s
buffered_vfprintf
- I; }& I( P! f3 U9 F6 S[busybox_unstripped]: 3302
- Z+ m3 g& n4 {/ E2 x n__mpatan
! M" e% X$ G$ Y7 P[busybox_unstripped]: 2976
% A2 D; s( m% {fallbackSort
2 N. A+ L) [( y3 d- Z3 g[busybox_unstripped]: 2928
1 Y0 T0 ~6 |5 @5 j7 j7 p3 `atan2Mp.constprop.0! E8 m7 x5 [" D7 D5 T8 l3 P
[busybox_unstripped]: 2304& \ ^& T8 ?; x
__mpsqrt
3 k' U- F5 c7 _$ S" u1 x[busybox_unstripped]: 2304
, G# @$ M1 w! K- L0 Q__slowpow5 f, K/ C/ B$ ]" ?
[busybox_unstripped]: 23043 T3 `) ^# I4 D2 w# u
cal_main
& r0 s8 ^/ P8 I[busybox_unstripped]: 2288
$ E, f) B8 |2 Y) ^5 a" B7 r0 ^% c2 Dinternal_fnmatch5 l6 v; a, Q+ }0 Y+ T* Z
[busybox_unstripped]: 2144
8 D5 d i5 w$ f' L" z: sdoCommands
, z1 B) R% d: ~, b/ `7 l) b[busybox_unstripped]: 2112
5 V" E% O2 k& l8 u- B, j__slowexp* T' `( n( j* p. B2 D1 i
[busybox_unstripped]: 1984- w: _. p# V) M8 {- Q& f" v4 M
__mpexp8 h$ {) f5 x+ A$ \, ?- X
[busybox_unstripped]: 1984- Z! Y1 u5 v, n! K8 `
normalized# Q, p3 P; L9 W: D W" g: F
[busybox_unstripped]: 19687 ]. f k, A& p; o
get_next_block
3 p% _- p1 @* e0 l0 F1 k[busybox_unstripped]: 1968, G u. ^2 Q! I7 _( a& L" Z, Z( k: x
identify_from_stdin7 ~$ d( C8 S4 \5 u6 b) B* ]
[busybox_unstripped]: 1792( R9 G+ ^( _4 L1 o1 c
__ieee754_log
7 r; H* w& e' f- {; S/ U M8 A" ^[busybox_unstripped]: 1648
$ A, d! }( F* a' _" Hhuft_build( l/ b1 j9 R, T
[busybox_unstripped]: 1488
7 v# g# h/ x. @' b9 S; liproute_modify' X& {" [9 `" C W
[busybox_unstripped]: 1376
6 C+ b0 Q$ Q1 g+ }+ Rsvc_getreq_common
% O0 K& Q$ x1 R! [[busybox_unstripped]: 1328
7 q3 W: b* x. o& V__mpatan24 U- z8 S D$ d# I
[busybox_unstripped]: 1312
2 Z5 Z! J& J# A1 o- c1 m( c& Oinflate_block
) P, v+ q$ U* K- g* O5 k[busybox_unstripped]: 1296" O, `; T) r7 a! O5 ^/ l" v; q
_IO_vfprintf! y6 ^ _0 Y/ V) ~& W
[busybox_unstripped]: 12962 ]% f: {6 |4 b) c! L
__libc_message% P( B' Q/ z# V+ C7 I
[busybox_unstripped]: 12802 W% C5 O& c1 q' Y
getlogin_r
0 [) Y( ~+ t6 G- [" V9 w5 B[busybox_unstripped]: 12804 g3 M/ z/ A4 c5 B
mainQSort3.constprop.2
0 ?; e8 T0 h5 g9 K/ R* e7 d) s[busybox_unstripped]: 1264 P7 ~/ A. }- x& g' ~$ h/ ?
__gettextparse
) A+ T0 E0 ]2 i# {2 @3 v/ Q[busybox_unstripped]: 1248
6 F8 G$ p0 W/ z% K! _iproute_get
& u/ K" Y7 R+ h# o" ^& l% a[busybox_unstripped]: 1184 F6 z u0 ^% n+ V
rx_main
$ |% ]5 D5 G0 q# l7 v[busybox_unstripped]: 1152
# E* c$ ]% f& \2 sether_wake_main
6 _3 h2 B$ Z+ H9 Z9 }+ W[busybox_unstripped]: 1152
3 F1 w* l. M% G! ]. f2 Oprocps_scan- Z; ~8 K5 u& ?6 l
[busybox_unstripped]: 1152
* ]3 z1 t/ k: P# bunwind_phase2_forced$ ]% o! h4 i3 R( e# z9 ~
[busybox_unstripped]: 1152
: |3 ?! I1 R& l5 }' u9 ]build_trtable
5 I7 X- M2 K! c[busybox_unstripped]: 11263 [* U! {0 |/ d2 g+ F
wget_main8 r& G0 p; h2 |9 Z. }' Q
[busybox_unstripped]: 1120
' \" z; p* O, t5 r" A/ Liprule_modify0 W& m n) d9 i. d! P/ b) w
[busybox_unstripped]: 1120
1 [6 l* A8 u. {* k0 ]getopt32
/ `" i+ V" z# q$ z" \[busybox_unstripped]: 1104
% Y R9 k# e% \_svcauth_des
3 U& p/ t0 z: F3 `1 @[busybox_unstripped]: 1088
7 | ?. L1 L/ Y) V8 N( ctwo_way_long_needle& \9 ~" {- p" G0 q
[busybox_unstripped]: 1056
5 g$ _1 G: \7 g7 w% `5 e, e; Oether_hostton
0 L1 c( {5 `* U/ K$ ^! }2 w- c[busybox_unstripped]: 1056
) A4 j3 K% y- p' Kcheck_existence_through_netlink1 X4 F8 d7 v# G% `$ ^& }
[busybox_unstripped]: 1040 @7 |% N: d' x* q/ J$ A$ j6 d
two_way_long_needle$ t3 ]( J+ h1 F6 s9 @3 J4 `
[busybox_unstripped]: 1040
; C2 f. j7 y- e5 a9 aclnt_sperror
2 s" d8 Z7 `: K! p* U[busybox_unstripped]: 1040
% i" M4 @/ G$ ~# R# h: Fclnt_spcreateerror
0 k2 V6 V) U! o' R( _" G[busybox_unstripped]: 10403 v3 b& q: ~* {/ L
_dl_signal_error
: n1 n# t! Y& D1 `+ T* p[busybox_unstripped]: 1040
" T* h1 C3 s" Y [5 |; a+ Ointernal_fnwmatch1 J# H h4 L0 E. z
[busybox_unstripped]: 1030- }/ _) o$ u# M* k4 ^& }% g
bad_zone
' T9 p0 I' O0 s! Q- q' ?' \[busybox_unstripped]: 10244 k/ L1 ]& |+ h5 J5 x
get_dirsize) [$ [6 b) s/ [, s
[busybox_unstripped]: 1024; {# n d s Y1 q6 q5 T
map_block2
- }3 I% q5 I3 S$ L2 E+ ?( F[busybox_unstripped]: 10240 q9 Y' I8 l- R* c! V
map_block# Y$ O/ R+ |7 r* M' H
[busybox_unstripped]: 10241 j% o4 F) n. `' e- `! B. j F
addLines
' |- j+ s& c: {$ p" T: G[busybox_unstripped]: 1024
& l3 Z( y0 T& x) _4 I$ W/ q$ x$ ^getNum
$ Y( X8 F Z* }* W( W/ U[busybox_unstripped]: 1024
2 i1 B# t( r+ Y6 [! B' Qperror_internal9 Q) z! M6 N; B7 {% x9 H: t/ _
[busybox_unstripped]: 1024
9 E6 r6 {+ n1 e! m* S4 X7 T6 V__getmntent_r
: Z2 J: A$ y' S5 H% S9 h[busybox_unstripped]: 10245 Y8 {) K* @. d h; Q& ^
__mpsin ^7 g* }& O; C5 h* x) _
[busybox_unstripped]: 9963 a- E3 z( J. ^- E
__mpcos
9 i' H# k% n+ T, \0 G1 P% \" U, m( f[busybox_unstripped]: 996
/ q3 Y' ^+ o1 e8 ]5 D__mpsin1! V- U7 K- L+ x/ s" h
[busybox_unstripped]: 992
2 v) z4 d8 }$ t) Q% ] ]! b__mpcos1
' O- q, T$ r/ D( ~5 O) d[busybox_unstripped]: 992
+ X3 r5 A/ Q3 X; r( `__sin32/ {0 Z$ L* i3 B* M& k' t* G
[busybox_unstripped]: 988# l0 b- p8 g7 n8 y! g# N8 h, u
__cos325 g2 V+ ]; k! Y0 V+ K
[busybox_unstripped]: 988
& n. W* G3 c% \% x8 {# l# b' b4 Z# ]: }6 b__mpranred+ p7 i6 i( w2 _+ Y+ f5 K+ ?3 [) l
[busybox_unstripped]: 988 s% K% O* ]+ ^6 n9 ^* `
__mplog% N8 q& m" b' e4 E6 G7 u1 `
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udhcpc_main
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发表于 2019-11-27 15:14
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