Config.in.arch 3.1 KB

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  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see extra/config/Kconfig-language.txt
  4. #
  5. config UCLIBC_HAS_MMU
  6. bool "Target CPU has a memory management unit (MMU)"
  7. default y
  8. depends !ARCH_HAS_NO_MMU
  9. help
  10. If your target CPU does not have a memory management unit (MMU),
  11. then answer N here. Normally, Linux runs on systems with an MMU.
  12. If you are building a uClinux system, answer N.
  13. Most people will answer Y.
  14. config UCLIBC_HAS_FLOATS
  15. bool "Enable floating point number support"
  16. default y
  17. help
  18. This option allows you to entirely omit all floating point number
  19. support from uClibc. This will cause floating point functions like
  20. strtod() to be omitted from uClibc. Other floating point functions,
  21. such as printf() and scanf() will still be included in the library,
  22. but will not contain support for floating point numbers.
  23. Answering N to this option can reduce the size of uClibc. Most people
  24. will answer Y.
  25. config HAS_FPU
  26. bool "Target CPU has a floating point unit (FPU)"
  27. depends on UCLIBC_HAS_FLOATS && !ARCH_HAS_NO_FPU
  28. default y
  29. help
  30. If your target CPU does not have a Floating Point Unit (FPU) or a
  31. kernel FPU emulator, but you still wish to support floating point
  32. functions, then uClibc will need to be compiled with soft floating
  33. point support (-msoft-float). If your target CPU does not have an
  34. FPU or an FPU emulator within the Linux kernel, then you should
  35. answer N.
  36. Most people will answer Y.
  37. config UCLIBC_HAS_SOFT_FLOAT
  38. bool
  39. depends on UCLIBC_HAS_FLOATS && !HAS_FPU
  40. default y
  41. config DO_C99_MATH
  42. bool "Enable full C99 math library support"
  43. depends on UCLIBC_HAS_FLOATS
  44. default n
  45. help
  46. If you want the uClibc math library to contain the full set C99
  47. math library features, then answer Y. If you leave this set to
  48. N the math library will contain only the math functions that were
  49. listed as part of the traditionla POSIX/IEEE 1003.1b-1993 standard.
  50. Leaving this option set to N will save around 35k on an x86 system.
  51. If your applications require the newer C99 math library functions,
  52. then answer Y.
  53. config WARNINGS
  54. string "Compiler Warnings"
  55. default "-Wall"
  56. help
  57. Set this to the set of gcc warnings you wish to see while compiling.
  58. config KERNEL_SOURCE
  59. string "Linux kernel header location"
  60. default "/usr/src/linux"
  61. help
  62. The kernel source you use to compile with should be the same as the
  63. Linux kernel you run your apps on. uClibc doesn't even try to achieve binary
  64. compatibility across kernel versions. So don't expect, for example, uClibc
  65. compiled with Linux kernel 2.0.x to implement lchown properly, since 2.0.x
  66. can't do that. Similarly, if you compile uClibc vs Linux 2.4.x kernel headers,
  67. but then run on Linux 2.0.x, lchown will be compiled into uClibc, but won't
  68. work at all. You have been warned.
  69. config UCLIBC_UCLINUX_BROKEN_MUNMAP
  70. bool
  71. depends on !UCLIBC_HAS_MMU
  72. default y
  73. config EXCLUDE_BRK
  74. bool
  75. depends on !UCLIBC_HAS_MMU
  76. default y
  77. config C_SYMBOL_PREFIX
  78. string
  79. default "_" if ARCH_HAS_C_SYMBOL_PREFIX
  80. default "" if !ARCH_HAS_C_SYMBOL_PREFIX