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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
21 fpu_host='fpu-generic'
22 ieee_support='no'
23
24 if test "x${have_fp_enable}" = "xyes" && test "x${have_fp_trap}" = "xyes"; then
25 fpu_host='fpu-aix'
26 ieee_support='yes'
27 fi
28
29 if test "x${have_fpsetmask}" = "xyes"; then
30 fpu_host='fpu-sysv'
31 ieee_support='yes'
32 fi
33
34 if test "x${have_feenableexcept}" = "xyes"; then
35 fpu_host='fpu-glibc'
36 ieee_support='yes'
37 fi
38
39 # x86 asm should be used instead of glibc, since glibc doesn't support
40 # the x86 denormal exception.
41 case "${host_cpu}" in
42 i?86 | x86_64)
43 if test "x${have_soft_float}" = "xyes"; then
44 fpu_host='fpu-generic'
45 else
46 fpu_host='fpu-387'
47 fi
48 ieee_support='yes'
49 ;;
50 esac
51
52 # Some targets require additional compiler options for NaN/Inf.
53 ieee_flags=
54 case "${host_cpu}" in
55 alpha*)
56 ieee_flags="-mieee" ;;
57 sh*)
58 ieee_flags="-mieee" ;;
59 esac