2 # For a description of the syntax of this configuration file,
3 # see extra/config/Kconfig-language.txt
7 prompt "Target Processor Endianness"
9 This is the endianness you wish to build use. Choose either Big
10 Endian, or Little Endian.
12 config ARCH_LITTLE_ENDIAN
14 depends on ARCH_SUPPORTS_LITTLE_ENDIAN
16 config ARCH_BIG_ENDIAN
18 depends on ARCH_SUPPORTS_BIG_ENDIAN
22 config ARCH_HAS_NO_MMU
27 bool "Target CPU has a memory management unit (MMU)"
29 depends !ARCH_HAS_NO_MMU
31 If your target CPU does not have a memory management unit (MMU),
32 then answer N here. Normally, Linux runs on systems with an MMU.
33 If you are building a uClinux system, answer N.
35 Most people will answer Y.
37 config UCLIBC_HAS_FLOATS
38 bool "Enable floating point number support"
41 This option allows you to entirely omit all floating point number
42 support from uClibc. This will cause floating point functions like
43 strtod() to be omitted from uClibc. Other floating point functions,
44 such as printf() and scanf() will still be included in the library,
45 but will not contain support for floating point numbers.
47 Answering N to this option can reduce the size of uClibc. Most people
51 bool "Target CPU has a floating point unit (FPU)"
52 depends on UCLIBC_HAS_FLOATS
55 If your target CPU does not have a Floating Point Unit (FPU) or a
56 kernel FPU emulator, but you still wish to support floating point
57 functions, then uClibc will need to be compiled with soft floating
58 point support (-msoft-float). If your target CPU does not have an
59 FPU or an FPU emulator within the Linux kernel, then you should
62 Most people will answer Y.
64 config UCLIBC_HAS_SOFT_FLOAT
66 depends on UCLIBC_HAS_FLOATS && !HAS_FPU
70 bool "Enable full C99 math library support"
71 depends on UCLIBC_HAS_FLOATS
74 If you want the uClibc math library to contain the full set C99
75 math library features, then answer Y. If you leave this set to
76 N the math library will contain only the math functions that were
77 listed as part of the traditional POSIX/IEEE 1003.1b-1993 standard.
78 Leaving this option set to N will save around 35k on an x86 system.
80 If your applications require the newer C99 math library functions,
84 string "Linux kernel header location"
85 default "/usr/src/linux"
87 The kernel source you use to compile with should be the same as the
88 Linux kernel you run your apps on. uClibc doesn't even try to achieve binary
89 compatibility across kernel versions. So don't expect, for example, uClibc
90 compiled with Linux kernel 2.0.x to implement lchown properly, since 2.0.x
91 can't do that. Similarly, if you compile uClibc vs Linux 2.4.x kernel headers,
92 but then run on Linux 2.0.x, lchown will be compiled into uClibc, but won't
93 work at all. You have been warned.
95 config UCLIBC_UCLINUX_BROKEN_MUNMAP
97 depends on !ARCH_HAS_MMU
102 depends on !ARCH_HAS_MMU
105 config C_SYMBOL_PREFIX
107 default "_" if ARCH_HAS_C_SYMBOL_PREFIX
108 default "" if !ARCH_HAS_C_SYMBOL_PREFIX
110 config HAVE_DOT_CONFIG