libgfortran/configure.host

   1 # configure.host
   2 #
   3 # This shell script handles all host based configuration for libgfortran.
   4 # It sets various shell variables based on the the host triplet.
   5 # You can modify this shell script without rerunning autoconf/aclocal/etc.
   6 # This file is "sourced", not executed.
   7 #
   8 #
   9 # It uses the following shell variables as set by config.guess:
  10 #   host                The configuration host (full CPU-vendor-OS triplet)
  11 #   host_cpu            The configuration host CPU
  12 #   host_os             The configuration host OS
  13 #
  14 #
  15 # It sets the following shell variables:
  16 #
  17 #   fpu_host            FPU-specific code file, defaults to fpu-generic.
  18 #   tmake_file          A list of machine-description-specific
  19 #                       makefile fragments.
  20
  21
  22
  23 # DEFAULTS
  24 fpu_host='fpu-generic'
  25 ieee_support='no'
  26
  27 if test "x${have_fp_enable}" = "xyes" && test "x${have_fp_trap}" = "xyes"; then
  28   fpu_host='fpu-aix'
  29   ieee_support='yes'
  30 fi
  31
  32 if test "x${have_fpsetmask}" = "xyes"; then
  33   fpu_host='fpu-sysv'
  34   ieee_support='yes'
  35 fi
  36
  37 if test "x${have_feenableexcept}" = "xyes"; then
  38   fpu_host='fpu-glibc'
  39   ieee_support='yes'
  40 fi
  41
  42 case "${host_cpu}" in
  43
  44   # x86 asm should be used instead of glibc, since glibc doesn't support
  45   # the x86 denormal exception.
  46   i?86 | x86_64)
  47     if test "x${have_soft_float}" = "xyes"; then
  48       fpu_host='fpu-generic'
  49       ieee_support='no'
  50     else
  51       fpu_host='fpu-387'
  52       ieee_support='yes'
  53     fi
  54     ;;
  55
  56   # use asm on aarch64-darwin
  57   aarch64)
  58     case "${host_os}" in
  59       darwin*)
  60         fpu_host='fpu-aarch64'
  61         ieee_support='yes'
  62         ;;
  63     esac
  64
  65 esac
  66
  67 # Some targets require additional compiler options for NaN/Inf.
  68 ieee_flags=
  69 case "${host_cpu}" in
  70   alpha*)
  71     ieee_flags="-mieee" ;;
  72   sh*)
  73     ieee_flags="-mieee" ;;
  74 esac
  75
  76 tmake_file=
  77 # Other system configury
  78 case "${target}" in
  79
  80   *-*-aix*)
  81         # Create AIX-style "FAT" libraries.
  82         tmake_file="t-aix"
  83         ;;
  84
  85   *)
  86         ;;
  87
  88 esac
  89