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#
# For a description of the syntax of this configuration file,
# see Documentation/kbuild/config-language.txt.
#
mainmenu "uClibc C Library Configuration"
menu "Target Architecture Features and Options"
choice
prompt "Target Processor Type"
default CONFIG_386
help
This is the processor type of your CPU. This information is used for
optimizing purposes. To build a library that will run on all x86 CPU
types (albeit not optimally fast), you can specify "386" here. If
you pick anything other than "386", there is no guarantee that uClibc
will even run on anything other than the selected processor type.
Here are the settings recommended for greatest speed:
- "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI
486DLC/DLC2, UMC 486SX-S and NexGen Nx586. Only "386" kernels
will run on a 386 class machine.
- "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
- "586" for generic Pentium CPUs lacking the TSC
(time stamp counter) register.
- "Pentium-Classic" for the Intel Pentium.
- "Pentium-MMX" for the Intel Pentium MMX.
- "Pentium-Pro" for the Intel Pentium Pro/Celeron/Pentium II.
- "Pentium-III" for the Intel Pentium III
and Celerons based on the Coppermine core.
- "Pentium-4" for the Intel Pentium 4.
- "K6" for the AMD K6, K6-II and K6-III (aka K6-3D).
- "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird).
- "Crusoe" for the Transmeta Crusoe series.
- "Winchip-C6" for original IDT Winchip.
- "Winchip-2" for IDT Winchip 2.
- "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
- "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
If you don't know what to do, choose "386".
config CONFIG_386
bool "386"
config CONFIG_486
bool "486"
config CONFIG_586
bool "586/K5/5x86/6x86/6x86MX"
config CONFIG_586TSC
bool "Pentium-Classic"
config CONFIG_586MMX
bool "Pentium-MMX"
config CONFIG_686
bool "Pentium-Pro/Celeron/Pentium-II"
config CONFIG_PENTIUMIII
bool "Pentium-III/Celeron(Coppermine)"
config CONFIG_PENTIUM4
bool "Pentium-4"
config CONFIG_K6
bool "K6/K6-II/K6-III"
config CONFIG_K7
bool "Athlon/Duron/K7"
config CONFIG_ELAN
bool "Elan"
config CONFIG_CRUSOE
bool "Crusoe"
config CONFIG_WINCHIPC6
bool "Winchip-C6"
config CONFIG_WINCHIP2
bool "Winchip-2"
config CONFIG_WINCHIP3D
bool "Winchip-2A/Winchip-3"
config CONFIG_CYRIXIII
bool "CyrixIII/VIA-C3"
endchoice
config UCLIBC_HAS_MMU
bool "Target CPU has a memory management unit (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 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 entirely omitted from uClibc. Other 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 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 management unit (FPU),
but you 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 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 traditionla 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 WARNINGS
string "Compiler Warnings"
default "-Wall"
help
Set this to the set of gcc warnings you wish to see while compiling.
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 C_SYMBOL_PREFIX
string
default ""
config UCLIBC_UCLINUX_BROKEN_MUNMAP
bool
depends on !HAS_MMU
default y
config HAVE_ELF
bool
default y
config NO_UNDERSCORES
bool
default n
config HAVE_DOT_HIDDEN
bool
default n
endmenu
source "extra/Configs/Config.in"
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