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
19
20# DEFAULTS
21fpu_host='fpu-generic'
22
23if test "x${have_feenableexcept}" = "xyes"; then
24  fpu_host='fpu-glibc'
25fi
26
27# x86 asm should be used instead of glibc, since glibc doesn't support
28# the x86 denormal exception.
29case "${host_cpu}" in
30  i?86 | x86_64)
31    fpu_host='fpu-387' ;;
32esac
33
34if test "x${have_fpsetmask}" = "xyes"; then
35  fpu_host='fpu-sysv'
36fi
37
38if test "x${have_fp_enable}" = "xyes" && test "x${have_fp_trap}" = "xyes"; then
39  fpu_host='fpu-aix'
40fi
41
42# Some targets require additional compiler options for NaN/Inf.
43ieee_flags=
44case "${host_cpu}" in
45  sh*)
46    ieee_flags="-mieee" ;;
47esac
48