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# GHC_CONVERT_OS(os, converted_cpu, target_var)
# --------------------------------
# converts os from gnu to ghc naming, and assigns the result to $target_var
AC_DEFUN([GHC_CONVERT_OS],[
case "$1" in
gnu*) # e.g. i686-unknown-gnu0.9
$3="gnu"
;;
# watchos and tvos are ios variants as of May 2017.
ios|watchos|tvos)
$3="ios"
;;
linux-android*)
$3="linux-android"
;;
linux-*|linux)
$3="linux"
;;
netbsd*)
$3="netbsd"
;;
openbsd*)
$3="openbsd"
;;
# As far as I'm aware, none of these have relevant variants
freebsd|dragonfly|hpux|linuxaout|kfreebsdgnu|freebsd2|mingw32|darwin|nextstep2|nextstep3|sunos4|ultrix|haiku)
$3="$1"
;;
msys)
AC_MSG_ERROR([Building GHC using the msys toolchain is not supported; please use mingw instead. Perhaps you need to set 'MSYSTEM=MINGW64 or MINGW32?'])
;;
aix*) # e.g. powerpc-ibm-aix7.1.3.0
$3="aix"
;;
darwin*) # e.g. aarch64-apple-darwin14
$3="darwin"
;;
solaris2*)
$3="solaris2"
;;
freebsd*) # like i686-gentoo-freebsd7
# i686-gentoo-freebsd8
# i686-gentoo-freebsd8.2
$3="freebsd"
;;
nto-qnx*)
$3="nto-qnx"
;;
wasi)
$3="wasi"
;;
ghcjs*)
$3="ghcjs"
;;
*)
echo "Unknown OS $1"
exit 1
;;
esac
])
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