Config.in.arch 6.7 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232
  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see extra/config/Kconfig-language.txt
  4. #
  5. #
  6. # Binary format
  7. #
  8. if !ARCH_USE_MMU
  9. choice
  10. prompt "Target File Format"
  11. config UCLIBC_FORMAT_ELF
  12. bool "ELF (using ELF_FDPIC loader)"
  13. depends on !ARCH_USE_MMU && (TARGET_arm || TARGET_m68k || \
  14. TARGET_riscv32 || TARGET_riscv64)
  15. select DOPIC
  16. select STATIC_PIE
  17. select ARCH_HAS_NO_SHARED
  18. select HAVE_LDSO
  19. config UCLIBC_FORMAT_FDPIC_ELF
  20. bool "FDPIC ELF"
  21. depends on !ARCH_USE_MMU && (TARGET_bfin || TARGET_frv || TARGET_arm)
  22. select DOPIC
  23. config UCLIBC_FORMAT_DSBT_ELF
  24. bool "DBST ELF"
  25. depends on !ARCH_USE_MMU && TARGET_c6x
  26. select DOPIC
  27. config UCLIBC_FORMAT_FLAT
  28. bool "STATIC FLAT"
  29. depends on !ARCH_USE_MMU && !TARGET_frv
  30. select ARCH_HAS_NO_LDSO
  31. config UCLIBC_FORMAT_FLAT_SEP_DATA
  32. bool "STATIC FLAT (sep-data)"
  33. depends on !ARCH_USE_MMU && !TARGET_frv
  34. select ARCH_HAS_NO_LDSO
  35. config UCLIBC_FORMAT_SHARED_FLAT
  36. bool "SHARED FLAT"
  37. depends on !ARCH_USE_MMU && !TARGET_frv
  38. select ARCH_HAS_NO_LDSO
  39. help
  40. Pick this one if you are using uClinux and wish to build
  41. uClibc as a flat-format shared library.
  42. endchoice
  43. endif
  44. if ARCH_USE_MMU
  45. comment "Using ELF file format"
  46. endif
  47. config ARCH_HAS_DEPRECATED_SYSCALLS
  48. bool
  49. help
  50. New architectures do not support deprecated system calls. However,
  51. these system calls are needed to build linuxthreads so
  52. this symbol controls whether there is support for these threading libraries
  53. or not.
  54. config UCLIBC_SHARED_FLAT_ID
  55. int "Shared library ID"
  56. default 1
  57. depends on UCLIBC_FORMAT_SHARED_FLAT
  58. help
  59. When using flat shared libraries, every library has a unique
  60. system-wide identifier. Identifier 0 is reserved for
  61. executables and true shared libraries have identifiers
  62. starting at 1. The maximum shared library identifier is
  63. determined by the kernel and is usually 3. Shared library
  64. N must be available on the target system as "/lib/libN.so".
  65. When a shared C library is used, it usually has identifier 1,
  66. but you can use this option to select a different identifier
  67. if you need to.
  68. #
  69. # Endian Format
  70. #
  71. config ARCH_ANY_ENDIAN
  72. bool
  73. config ARCH_BIG_ENDIAN
  74. bool
  75. config ARCH_LITTLE_ENDIAN
  76. bool
  77. if ARCH_ANY_ENDIAN
  78. choice
  79. prompt "Target Processor Endianness"
  80. help
  81. This is the endianness you wish to use. Choose either Big
  82. Endian, or Little Endian.
  83. config ARCH_WANTS_BIG_ENDIAN
  84. bool "Big Endian"
  85. select ARCH_BIG_ENDIAN
  86. config ARCH_WANTS_LITTLE_ENDIAN
  87. bool "Little Endian"
  88. select ARCH_LITTLE_ENDIAN
  89. endchoice
  90. endif
  91. # if the arch only supports one endian, just display the setting
  92. if !ARCH_ANY_ENDIAN && ARCH_LITTLE_ENDIAN
  93. comment "Using Little Endian"
  94. endif
  95. if !ARCH_ANY_ENDIAN && ARCH_BIG_ENDIAN
  96. comment "Using Big Endian"
  97. endif
  98. config ARCH_HAS_NO_MMU
  99. bool
  100. if ARCH_HAS_NO_MMU
  101. comment "Target CPU lacks a memory management unit (MMU)"
  102. endif
  103. config ARCH_HAS_MMU
  104. bool "Target CPU has a memory management unit (MMU)"
  105. depends on !ARCH_HAS_NO_MMU
  106. default y
  107. help
  108. If your target CPU does not have a memory management unit (MMU),
  109. then answer N here. Normally, Linux runs on systems with an MMU.
  110. If you are building a uClinux system, answer N.
  111. Most people will answer Y.
  112. config ARCH_USE_MMU
  113. bool "Do you want to utilize the MMU?"
  114. depends on ARCH_HAS_MMU
  115. default y
  116. help
  117. If your target CPU has a MMU, and you wish to actually utilize it,
  118. then answer Y here. Normal Linux requires an MMU.
  119. If you're unsure, answer Y.
  120. config UCLIBC_HAS_FLOATS
  121. bool "Enable floating point number support"
  122. default y
  123. help
  124. This option allows you to entirely omit all floating point number
  125. support from uClibc. This will cause floating point functions like
  126. strtod() to be omitted from uClibc. Other floating point functions,
  127. such as printf() and scanf() will still be included in the library,
  128. but will not contain support for floating point numbers.
  129. Answering N to this option can reduce the size of uClibc.
  130. Most people will answer Y.
  131. config UCLIBC_HAS_FPU
  132. bool "Target CPU has a floating point unit (FPU)"
  133. default y
  134. help
  135. If your target CPU does not have a Floating Point Unit (FPU) or a
  136. kernel FPU emulator, but you still wish to support floating point
  137. functions, then uClibc will need to be compiled with soft floating
  138. point support (-msoft-float). If your target CPU does not have an
  139. FPU or an FPU emulator within the Linux kernel, then you should
  140. answer N.
  141. Most people will answer Y.
  142. config UCLIBC_HAS_SOFT_FLOAT
  143. bool
  144. depends on UCLIBC_HAS_FLOATS && !UCLIBC_HAS_FPU
  145. default y
  146. config DO_C99_MATH
  147. bool "Enable full C99 math library support"
  148. depends on UCLIBC_HAS_FLOATS
  149. help
  150. If you want the uClibc math library to contain the full set C99
  151. math library features, then answer Y. If you leave this set to
  152. N the math library will contain only the math functions that were
  153. listed as part of the traditional POSIX/IEEE 1003.1b-1993 standard.
  154. Leaving this option set to N will save around 35k on an x86 system.
  155. If your applications require the newer C99 math library functions,
  156. then answer Y.
  157. config DO_XSI_MATH
  158. bool "Enable XSI math extensions to the ISO C standard (bessel)"
  159. depends on UCLIBC_HAS_FLOATS
  160. help
  161. X/Open System Interfaces extensions to ISO C math functions
  162. (differential equation functions):
  163. j0, j1, jn - Bessel functions of the first kind
  164. y0, y1, yn - Bessel functions of the second kind
  165. config UCLIBC_HAS_FENV
  166. bool "Enable C99 Floating-point environment"
  167. depends on UCLIBC_HAS_FLOATS
  168. depends on TARGET_i386 || \
  169. TARGET_metag || \
  170. TARGET_nds32 || \
  171. (TARGET_powerpc && CONFIG_E500) || \
  172. TARGET_x86_64
  173. help
  174. If you want the uClibc math library to contain the C99 floating
  175. point environment, rounding and exception handling functions then
  176. say Y here.
  177. config UCLIBC_HAS_LONG_DOUBLE_MATH
  178. bool "Enable long double support"
  179. depends on DO_C99_MATH
  180. default y
  181. help
  182. If you want the uClibc math library to contain the full set of C99
  183. long double math library features, then answer Y.
  184. Danger: These are only wrappers to the double library functions!
  185. config KERNEL_HEADERS
  186. string "Linux kernel header location"
  187. default ""
  188. help
  189. The kernel source you use to compile with should be the same
  190. as the Linux kernel you run your apps on. uClibc doesn't even
  191. try to achieve binary compatibility across kernel versions.
  192. So don't expect, for example, uClibc compiled with Linux kernel
  193. 2.0.x to implement lchown properly, since 2.0.x can't do that.
  194. Similarly, if you compile uClibc vs Linux 2.4.x kernel headers,
  195. but then run on Linux 2.0.x, lchown will be compiled into uClibc,
  196. but won't work at all. You have been warned.
  197. If you don't set this, we'll assume the toolchain can find them.
  198. config UCLIBC_UCLINUX_BROKEN_MUNMAP
  199. bool
  200. depends on !ARCH_USE_MMU
  201. default y
  202. config HAVE_DOT_CONFIG
  203. bool
  204. default y