source: lemon-tutorial/configure @ 34:eda742a0b1b4

#!/bin/bash

quiet=0
function quiet { [[ $quiet == 1 ]]; }

if [[ "$1" == "-q" ]]; then
  quiet=1
  shift
fi

prev=
for option
do
  if test -n "$prev"
  then
    eval "$prev=\$option"
    prev=
    continue
  fi

  optarg=`expr "x$option" : 'x[^=]*=\(.*\)'`

  case $option in
      --lemon-doc-prefix)
          prev=lemon_doc_prefix ;;
      --lemon-doc-prefix=*)
      lemon_doc_prefix=$optarg ;;
      --help | -h)
          cat << EOF
Usage: $0 [OPTION]

Options:
  -h, --help                  display this help and exit
      --lemon-doc-prefix=loc  The location of the lemon doc. By default it is
                              http://lemon.cs.elte.hu/pub/doc/1.1.1

Expamle:
  $0 --lemon-doc-prefix=file://usr/local/share/doc/lemon/docs/
EOF
    exit 0
    ;;

  *)
    cat << EOF >&2
$0: unrecognized option: $option
Try \`$0 --help' for more information.
EOF
    exit 1
    ;;

  esac
done


if test -z "$lemon_doc_prefix"
then
    lemon_doc_prefix='http://lemon.cs.elte.hu/pub/doc/1.1.1'
fi
lemon_doc_prefix=$(echo $lemon_doc_prefix|sed 's/\//\\\\\\\//g')

lemon_cflags=$(pkg-config --cflags lemon|sed 's/\//\\\//g')
lemon_libs=$(pkg-config --libs lemon|sed 's/\//\\\//g')


sed -e "s/@lemon_cflags@/${lemon_cflags}/g" \
    -e "s/@lemon_libs@/${lemon_libs}/g" \
   -e "s/@make_lemon_doc_prefix@/${lemon_doc_prefix}/g" \
    < Makefile.in > Makefile