#!/usr/bin/env bash
set -e

src_dir="${0%/*}"

if [ -z "$CC" ]; then
  if type -p gcc >/dev/null; then
    CC=gcc
  else
    echo "warning: gcc not found; using CC=cc" >&2
    CC=cc
  fi
fi

if ! type -p "$CC" >/dev/null; then
  echo "aborted: compiler not found: $CC" >&2
  exit 1
fi

case "$(uname -s)" in
Darwin* )
  host_os="darwin$(uname -r)"
  ;;
FreeBSD* )
  host_os="freebsd$(uname -r)"
  ;;
OpenBSD* )
  host_os="openbsd$(uname -r)"
  ;;
* )
  host_os="linux-gnu"
esac

eval "$("$src_dir"/shobj-conf -C "$CC" -o "$host_os")"

sed "
  s,@CC@,${CC},
  s,@CFLAGS@,${CFLAGS},
  s,@LOCAL_CFLAGS@,${LOCAL_CFLAGS},
  s,@DEFS@,${DEFS},
  s,@LOCAL_DEFS@,${LOCAL_DEFS},
  s,@SHOBJ_CC@,${SHOBJ_CC},
  s,@SHOBJ_CFLAGS@,${SHOBJ_CFLAGS},
  s,@SHOBJ_LD@,${SHOBJ_LD},
  s,@SHOBJ_LDFLAGS@,${SHOBJ_LDFLAGS//,/\\,},
  s,@SHOBJ_XLDFLAGS@,${SHOBJ_XLDFLAGS//,/\\,},
  s,@SHOBJ_LIBS@,${SHOBJ_LIBS},
  s,@SHOBJ_STATUS@,${SHOBJ_STATUS},
" "$src_dir"/Makefile.in > "$src_dir"/Makefile