1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
#
# For a description of the syntax of this configuration file,
# see extra/config/Kconfig-language.txt
#
config ARCH_ANY_ENDIAN
bool
config ARCH_BIG_ENDIAN
bool
config ARCH_LITTLE_ENDIAN
bool
if ARCH_ANY_ENDIAN
choice
prompt "Target Processor Endianness"
help
This is the endianness you wish to use. Choose either Big
Endian, or Little Endian.
config ARCH_WANTS_BIG_ENDIAN
bool "Big Endian"
select ARCH_BIG_ENDIAN
config ARCH_WANTS_LITTLE_ENDIAN
bool "Little Endian"
select ARCH_LITTLE_ENDIAN
endchoice
endif
# if the arch only supports one endian, just display the setting
if !ARCH_ANY_ENDIAN && ARCH_LITTLE_ENDIAN
comment "Using Little Endian"
endif
if !ARCH_ANY_ENDIAN && ARCH_BIG_ENDIAN
comment "Using Big Endian"
endif
config ARCH_HAS_NO_MMU
bool
if ARCH_HAS_NO_MMU
comment "Target CPU lacks a memory management unit (MMU)"
endif
config ARCH_HAS_MMU
bool "Target CPU has a memory management unit (MMU)"
depends !ARCH_HAS_NO_MMU
default y
help
If your target CPU does not have a memory management unit (MMU),
then answer N here. Normally, Linux runs on systems with an MMU.
If you are building a uClinux system, answer N.
Most people will answer Y.
config ARCH_USE_MMU
bool "Do you want to utilize the MMU?"
depends on ARCH_HAS_MMU
default y
help
If your target CPU has a MMU, and you wish to actually utilize it,
then answer Y here. Normal Linux requires an MMU.
If you're unsure, answer Y.
config UCLIBC_HAS_FLOATS
bool "Enable floating point number support"
default y
help
This option allows you to entirely omit all floating point number
support from uClibc. This will cause floating point functions like
strtod() to be omitted from uClibc. Other floating point functions,
such as printf() and scanf() will still be included in the library,
but will not contain support for floating point numbers.
Answering N to this option can reduce the size of uClibc. Most people
will answer Y.
config UCLIBC_HAS_FPU
bool "Target CPU has a floating point unit (FPU)"
depends on UCLIBC_HAS_FLOATS
default y
help
If your target CPU does not have a Floating Point Unit (FPU) or a
kernel FPU emulator, but you still wish to support floating point
functions, then uClibc will need to be compiled with soft floating
point support (-msoft-float). If your target CPU does not have an
FPU or an FPU emulator within the Linux kernel, then you should
answer N.
Most people will answer Y.
config UCLIBC_HAS_SOFT_FLOAT
bool
depends on UCLIBC_HAS_FLOATS && !UCLIBC_HAS_FPU
default y
config DO_C99_MATH
bool "Enable full C99 math library support"
depends on UCLIBC_HAS_FLOATS
default n
help
If you want the uClibc math library to contain the full set C99
math library features, then answer Y. If you leave this set to
N the math library will contain only the math functions that were
listed as part of the traditional POSIX/IEEE 1003.1b-1993 standard.
Leaving this option set to N will save around 35k on an x86 system.
If your applications require the newer C99 math library functions,
then answer Y.
config KERNEL_SOURCE
string "Linux kernel header location"
default "/usr/src/linux"
help
The kernel source you use to compile with should be the same as the
Linux kernel you run your apps on. uClibc doesn't even try to achieve binary
compatibility across kernel versions. So don't expect, for example, uClibc
compiled with Linux kernel 2.0.x to implement lchown properly, since 2.0.x
can't do that. Similarly, if you compile uClibc vs Linux 2.4.x kernel headers,
but then run on Linux 2.0.x, lchown will be compiled into uClibc, but won't
work at all. You have been warned.
config UCLIBC_UCLINUX_BROKEN_MUNMAP
bool
depends on !ARCH_USE_MMU
default y
config EXCLUDE_BRK
bool
depends on !ARCH_USE_MMU
default y
config HAVE_DOT_CONFIG
bool
default y
|
