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1 # configure.host
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2 #
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3 # This shell script handles all host based configuration for libgfortran.
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4 # It sets various shell variables based on the the host triplet.
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5 # You can modify this shell script without rerunning autoconf/aclocal/etc.
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6 # This file is "sourced", not executed.
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7 #
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8 #
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9 # It uses the following shell variables as set by config.guess:
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10 # host The configuration host (full CPU-vendor-OS triplet)
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11 # host_cpu The configuration host CPU
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12 # host_os The configuration host OS
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13 #
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14 #
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15 # It sets the following shell variables:
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16 #
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17 # fpu_host FPU-specific code file, defaults to fpu-generic.
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18
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19
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20 # DEFAULTS
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21 fpu_host='fpu-generic'
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22 ieee_support='no'
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23
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24 if test "x${have_fp_enable}" = "xyes" && test "x${have_fp_trap}" = "xyes"; then
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25 fpu_host='fpu-aix'
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26 ieee_support='yes'
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27 fi
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28
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29 if test "x${have_fpsetmask}" = "xyes"; then
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30 fpu_host='fpu-sysv'
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31 ieee_support='yes'
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32 fi
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33
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34 if test "x${have_feenableexcept}" = "xyes"; then
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35 fpu_host='fpu-glibc'
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36 ieee_support='yes'
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37 fi
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38
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39 # x86 asm should be used instead of glibc, since glibc doesn't support
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40 # the x86 denormal exception.
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41 case "${host_cpu}" in
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42 i?86 | x86_64)
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43 if test "x${have_soft_float}" = "xyes"; then
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44 fpu_host='fpu-generic'
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45 else
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46 fpu_host='fpu-387'
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47 fi
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48 ieee_support='yes'
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49 ;;
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50 esac
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51
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52 # Some targets require additional compiler options for NaN/Inf.
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53 ieee_flags=
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54 case "${host_cpu}" in
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55 alpha*)
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56 ieee_flags="-mieee" ;;
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57 sh*)
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58 ieee_flags="-mieee" ;;
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59 esac
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