RISC-V: Make stack_save_restore tests more robust
[official-gcc.git] / libgfortran / configure.host
blob3d6c2db7772e1caafc421e5498f580376f6fbe26
1 # configure.host
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.
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
15 # It sets the following shell variables:
17 #   fpu_host            FPU-specific code file, defaults to fpu-generic.
18 #   tmake_file          A list of machine-description-specific
19 #                       makefile fragments.
23 # DEFAULTS
24 fpu_host='fpu-generic'
25 ieee_support='no'
27 if test "x${have_fp_enable}" = "xyes" && test "x${have_fp_trap}" = "xyes"; then
28   fpu_host='fpu-aix'
29   ieee_support='yes'
32 if test "x${have_fpsetmask}" = "xyes"; then
33   fpu_host='fpu-sysv'
34   ieee_support='yes'
37 if test "x${have_feenableexcept}" = "xyes"; then
38   fpu_host='fpu-glibc'
39   ieee_support='yes'
42 case "${host_cpu}" in
44   # x86 asm should be used instead of glibc, since glibc doesn't support
45   # the x86 denormal exception.
46   i?86 | x86_64)
47     if test "x${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     ;;
56   # use asm on aarch64-darwin
57   aarch64)
58     case "${host_os}" in
59       darwin*)
60         fpu_host='fpu-aarch64'
61         ieee_support='yes'
62         ;;
63     esac
65 esac
67 # Some targets require additional compiler options for NaN/Inf.
68 ieee_flags=
69 case "${host_cpu}" in
70   alpha*)
71     ieee_flags="-mieee" ;;
72   sh*)
73     ieee_flags="-mieee" ;;
74 esac
76 tmake_file=
77 # Other system configury
78 case "${target}" in
80   *-*-aix*)
81         # Create AIX-style "FAT" libraries.
82         tmake_file="t-aix"
83         ;;
85   *)
86         ;;
88 esac