configure

#! /bin/sh

#########################################################################
#                                                                       #
#                                 CamlDBM                               #
#                                                                       #
#            Xavier Leroy, projet Gallium, INRIA Rocquencourt           #
#                                                                       #
#   Copyright 2011 Institut National de Recherche en Informatique et    #
#   en Automatique.  All rights reserved.  This file is distributed     #
#   under the terms of the GNU Library General Public License, with     #
#   the special exception on linking described in file LICENSE.         #
#                                                                       #
#########################################################################

version=`ocamlc -version`

if test $? -ne 0; then
  echo "ocamlc not found, aborting."
  exit 2
fi

echo "Configuring for OCaml version $version"
echo

stdlib=`ocamlc -where`

hasgot() {
  rm -f hasgot.c
  (echo "#include <$2>"
   echo 'int main() {'
   if test $2 = gdbm.h; then
     echo '  (void) gdbm_open("foo", 0, 0, 0, NULL);'
   else
     echo '  (void) dbm_open("foo", 0, 0);'
   fi
   echo '  return 0;'
   echo '}') > hasgot.c
  ${CC:-cc} $1 -o hasgot.exe hasgot.c $3 2>/dev/null
  res=$?
  rm -f hasgot.c hasgot.exe
  return $res
}

dbm_include="not found"
dbm_link="not found"
dbm_defines=""

for include in \
      "" \
      "-I/usr/include/db1" \
      "-I/usr/include/gdbm" \
      "-I/usr/local/include" \
      "-I/opt/homebrew/include" ; do
    if hasgot "$include" ndbm.h ""; then
        dbm_include="$include"
        dbm_defines="-DDBM_COMPAT"
        dbm_link=""
        break
    elif hasgot "$include" gdbm.h -lgdbm; then
        dbm_include="$include"
        dbm_link="-lgdbm"
        break
    elif hasgot "$include" ndbm.h -lndbm; then
        dbm_include="$include"
        dbm_defines="-DDBM_COMPAT"
        dbm_link="-lndbm"
        break
    elif hasgot "$include" ndbm.h -ldb1; then
        dbm_include="$include"
        dbm_defines="-DDBM_COMPAT"
        dbm_link="-ldb1"
        break
    fi
done
if test "$dbm_include" = "not found" || test "$dbm_link" = "not found"; then
  echo "NDBM and GDBM not found, the \"camldbm\" library cannot be built."
  exit 2
fi

echo "Configuration for the \"camldbm\" library:"
echo "        options for compiling .... $dbm_include $dbm_defines"
echo "        options for linking ...... $dbm_link"
echo
echo "Configuration successful"
echo

echo "OCAML_STDLIB=$stdlib" > Makefile.config
echo "DBM_INCLUDES=$dbm_include" >> Makefile.config
echo "DBM_LINK=$dbm_link" >> Makefile.config
echo "DBM_DEFINES=$dbm_defines" >> Makefile.config