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
24fpu_host='fpu-generic'
25ieee_support='no'
26
27if test "x${have_fp_enable}" = "xyes" && test "x${have_fp_trap}" = "xyes"; then
28  fpu_host='fpu-aix'
29  ieee_support='yes'
30fi
31
32if test "x${have_fpsetmask}" = "xyes"; then
33  fpu_host='fpu-sysv'
34  ieee_support='yes'
35fi
36
37if test "x${have_feenableexcept}" = "xyes"; then
38  fpu_host='fpu-glibc'
39  ieee_support='yes'
40fi
41
42# x86 asm should be used instead of glibc, since glibc doesn't support
43# the x86 denormal exception.
44case "${host_cpu}" in
45  i?86 | x86_64)
46    if test "x${have_soft_float}" = "xyes"; then
47      fpu_host='fpu-generic'
48    else
49      fpu_host='fpu-387'
50    fi
51    ieee_support='yes'
52    ;;
53esac
54
55# Some targets require additional compiler options for NaN/Inf.
56ieee_flags=
57case "${host_cpu}" in
58  alpha*)
59    ieee_flags="-mieee" ;;
60  sh*)
61    ieee_flags="-mieee" ;;
62esac
63
64tmake_file=
65# Other system configury
66case "${target}" in
67
68  *-*-aix*)
69	# Create AIX-style "FAT" libraries.
70	tmake_file="t-aix"
71	;;
72
73  *)
74	;;
75
76esac
77
78