2 # For a description of the syntax of this configuration file,
3 # see extra/config/Kconfig-language.txt
7 prompt "Target Processor Endianness"
8 default ARCH_LITTLE_ENDIAN
10 This is the endianness you wish to build use. Choose either Big
11 Endian, or Little Endian.
13 config ARCH_LITTLE_ENDIAN
16 config ARCH_BIG_ENDIAN
21 config ARCH_HAS_NO_MMU
26 bool "Target CPU has a memory management unit (MMU)"
28 depends !ARCH_HAS_NO_MMU
30 If your target CPU does not have a memory management unit (MMU),
31 then answer N here. Normally, Linux runs on systems with an MMU.
32 If you are building a uClinux system, answer N.
34 Most people will answer Y.
36 config UCLIBC_HAS_FLOATS
37 bool "Enable floating point number support"
40 This option allows you to entirely omit all floating point number
41 support from uClibc. This will cause floating point functions like
42 strtod() to be omitted from uClibc. Other floating point functions,
43 such as printf() and scanf() will still be included in the library,
44 but will not contain support for floating point numbers.
46 Answering N to this option can reduce the size of uClibc. Most people
49 config ARCH_HAS_NO_FPU
54 bool "Target CPU has a floating point unit (FPU)"
55 depends on UCLIBC_HAS_FLOATS && !ARCH_HAS_NO_FPU
58 If your target CPU does not have a Floating Point Unit (FPU) or a
59 kernel FPU emulator, but you still wish to support floating point
60 functions, then uClibc will need to be compiled with soft floating
61 point support (-msoft-float). If your target CPU does not have an
62 FPU or an FPU emulator within the Linux kernel, then you should
65 Most people will answer Y.
67 config UCLIBC_HAS_SOFT_FLOAT
69 depends on UCLIBC_HAS_FLOATS && !HAS_FPU
73 bool "Enable full C99 math library support"
74 depends on UCLIBC_HAS_FLOATS
77 If you want the uClibc math library to contain the full set C99
78 math library features, then answer Y. If you leave this set to
79 N the math library will contain only the math functions that were
80 listed as part of the traditional POSIX/IEEE 1003.1b-1993 standard.
81 Leaving this option set to N will save around 35k on an x86 system.
83 If your applications require the newer C99 math library functions,
87 string "Compiler Warnings"
90 Set this to the set of gcc warnings you wish to see while compiling.
93 string "Linux kernel header location"
94 default "/usr/src/linux"
96 The kernel source you use to compile with should be the same as the
97 Linux kernel you run your apps on. uClibc doesn't even try to achieve binary
98 compatibility across kernel versions. So don't expect, for example, uClibc
99 compiled with Linux kernel 2.0.x to implement lchown properly, since 2.0.x
100 can't do that. Similarly, if you compile uClibc vs Linux 2.4.x kernel headers,
101 but then run on Linux 2.0.x, lchown will be compiled into uClibc, but won't
102 work at all. You have been warned.
104 config UCLIBC_UCLINUX_BROKEN_MUNMAP
106 depends on !UCLIBC_HAS_MMU
111 depends on !UCLIBC_HAS_MMU
114 config C_SYMBOL_PREFIX
116 default "_" if ARCH_HAS_C_SYMBOL_PREFIX
117 default "" if !ARCH_HAS_C_SYMBOL_PREFIX
119 config HAVE_DOT_CONFIG