darling-libkqueue/configure

#!/bin/sh

c_exports="program version target cflags"

make_exports="program version target \
              prefix libdir includedir mandir \
              cflags ldflags ldadd libdepends \
              sources mans headers extra_dist subdirs \
              install"

required_headers=
optional_headers=

pre_configure_hook() {
    return
}

post_configure_hook() {
    return
}

. ./config.inc

export_to_make() {
  for id in $*
  do
    uc_id=`echo $id | tr 'a-z' 'A-Z'`;
    eval "echo \"$uc_id=\"\$$id\"\" >> config.mk"
  done
}

export_to_c() {
  for id in $*
  do
    uc_id=`echo $id | tr 'a-z' 'A-Z'`;
    eval "echo \"#define $uc_id \\\"\$$id\\\"\" >> config.h"
  done
}

finalize() {
  eval "if [ \"\$$1\" = \"\" ] ; then $1=\"$2\" ; fi"
}

process_argv() {
    for arg in $*
    do
        id=`echo "$arg" | sed 's/=.*//; s/^--//;'`
        val=`echo "$arg" | sed 's/^.*=//'`
        if [ "$val" = "" ] ; then val=1 ; fi
        eval "$id=\"$val\"" 
    done
}

 
check_header() {	 
   sym=`echo "have_$1" | sed 's,[./],_,g'`	 
   uc_sym=`echo "$sym" | tr a-z A-Z`	 
   path=$1

   printf "checking for $path.. "
   if [ -f "/usr/include/$path" ] ; then
     echo "yes"
     echo "#define $uc_sym" >> config.h
     eval "$sym=yes"
     return 0
   else  
     echo "no"
     echo "#undef $uc_sym" >> config.h
     eval "$sym=no"
     return 1
   fi
}

check_headers() {	 
   for header in $*
   do
       check_header "$header"
   done
}

check_symbol() {
    header=$1
    symbol=$2

    uc_symbol=`echo "HAVE_$symbol" | tr a-z A-Z | sed 's,[./],_,g'`
    lc_symbol=`echo "have_$symbol" | tr A-Z a-z | sed 's,[./],_,g'`

    if [ -f "$header" ] ; then
        path="$header"
    elif [ -f "/usr/include/$header" ] ; then
        path="/usr/include/$header"
    else
        echo "*** ERROR: Cannot find <$header>"
        exit 1
    fi
     
    printf "checking $header for $symbol.. "    
    if [ "`grep $symbol $path`" != "" ] ; then
     eval "$lc_symbol=yes"
     echo "#define $uc_symbol 1" >> config.h
     echo "yes"
     return 0
    else
     eval "$lc_symbol=no"
     echo "no"
     echo "#undef $uc_symbol" >> config.h
     return 1
    fi
}

check_install() {
    printf "checking for a BSD-compatible install.. "
    if [ "`uname -s`" = "SunOS" ] ; then
        default_install=/usr/ucb/install
    else
        default_install=/usr/bin/install
    fi
    finalize install "$default_install"
    echo "$install"
}

err() {
    echo "*** ERROR *** $*"
    exit 1
}

subst_vars() {
  outfile=$1

  if [ ! -f "${outfile}.in" ] ; then
      return
  fi

  echo "Creating $outfile"
  rm -f $outfile
  sed -e "
       s,@@PROGRAM@@,$program,g;
       s,@@VERSION@@,$version,g;
       s,@@PREFIX@@,$prefix,g;
       s,@@LIBDIR@@,$libdir,g;
       s,@@INCLUDEDIR@@,$includedir,g;
       s,@@MANDIR@@,$mandir,g;
       s,@@LIBDEPENDS@@,$libdepends,g;
       s,@@PKG_SUMMARY@@,$pkg_summary,g;
       s,@@PKG_DESCRIPTION@@,$pkg_description,g;
       s,@@LICENSE@@,$license,g;
       s,@@AUTHOR@@,$author,g;
       " < ${outfile}.in > $outfile
  chmod 400 $outfile
}

#######################################################################
#
#                           MAIN()
#
#######################################################################

# Initialize the output files
#
for output_file in config.mk $program.pc
do
   rm -f $output_file
   echo "# AUTOMATICALLY GENERATED -- DO NOT EDIT" > $output_file
done
rm -f config.h
echo "/* AUTOMATICALLY GENERATED -- DO NOT EDIT */" > config.h

process_argv "$*"

finalize program    "$program"
finalize version    "$version"
finalize target     `uname -s | tr A-Z a-z`
finalize prefix     "/usr/local"
finalize libdir     "${prefix}/lib"
finalize includedir "${prefix}/include"
finalize mandir     "${prefix}/share/man"
finalize cflags     "$cflags"
finalize libdepends "$libdepends"
finalize ldadd      ""
finalize ldflags    ""
finalize cc         "/usr/bin/cc"

echo "checking operating system type.. $target"
check_install

pre_configure_hook

for header in $required_headers
do
  check_header "$header" || err "$header is required, but cannot be found."
done
check_headers $optional_headers

post_configure_hook

subst_vars "$program.pc"
subst_vars "$program.la"
subst_vars "rpm.spec"

echo "Creating config.h"
export_to_c $c_exports

echo "Creating config.mk"
export_to_make "$make_exports"