release/src/router/usbmodeswitch/jim/autosetup/cc-lib.tcl

   1 # Copyright (c) 2011 WorkWare Systems http://www.workware.net.au/
   2 # All rights reserved
   3
   4 # @synopsis:
   5 #
   6 # Provides a library of common tests on top of the 'cc' module.
   7
   8 use cc
   9
  10 module-options {}
  11
  12 # @cc-check-lfs
  13 #
  14 # The equivalent of the AC_SYS_LARGEFILE macro
  15 #
  16 # defines 'HAVE_LFS' if LFS is available,
  17 # and defines '_FILE_OFFSET_BITS=64' if necessary
  18 #
  19 # Returns 1 if 'LFS' is available or 0 otherwise
  20 #
  21 proc cc-check-lfs {} {
  22         cc-check-includes sys/types.h
  23         msg-checking "Checking if -D_FILE_OFFSET_BITS=64 is needed..."
  24         set lfs 1
  25         if {[msg-quiet cc-with {-includes sys/types.h} {cc-check-sizeof off_t}] == 8} {
  26                 msg-result no
  27         } elseif {[msg-quiet cc-with {-includes sys/types.h -cflags -D_FILE_OFFSET_BITS=64} {cc-check-sizeof off_t}] == 8} {
  28                 define _FILE_OFFSET_BITS 64
  29                 msg-result yes
  30         } else {
  31                 set lfs 0
  32                 msg-result none
  33         }
  34         define-feature lfs $lfs
  35         return $lfs
  36 }
  37
  38 # @cc-check-endian
  39 #
  40 # The equivalent of the AC_C_BIGENDIAN macro
  41 #
  42 # defines 'HAVE_BIG_ENDIAN' if endian is known to be big,
  43 # or 'HAVE_LITTLE_ENDIAN' if endian is known to be little.
  44 #
  45 # Returns 1 if determined, or 0 if not.
  46 #
  47 proc cc-check-endian {} {
  48         cc-check-includes sys/types.h sys/param.h
  49         set rc 0
  50         msg-checking "Checking endian..."
  51         cc-with {-includes {sys/types.h sys/param.h}} {
  52                 if {[cctest -code {
  53                         #if !defined(BIG_ENDIAN) || !defined(BYTE_ORDER)
  54                                 #error unknown
  55                         #elif BYTE_ORDER != BIG_ENDIAN
  56                                 #error little
  57                         #endif
  58                 }]} {
  59                         define-feature big-endian
  60                         msg-result "big"
  61                         set rc 1
  62                 } elseif {[cctest -code {
  63                         #if !defined(LITTLE_ENDIAN) || !defined(BYTE_ORDER)
  64                                 #error unknown
  65                         #elif BYTE_ORDER != LITTLE_ENDIAN
  66                                 #error big
  67                         #endif
  68                 }]} {
  69                         define-feature little-endian
  70                         msg-result "little"
  71                         set rc 1
  72                 } else {
  73                         msg-result "unknown"
  74                 }
  75         }
  76         return $rc
  77 }