Make Trick Mac Homebrew friendly

I have /usr/local/bin in my PATH and so I was finding swig there.
Running configure through brew does not include /usr/local/bin.
I changed the test to look for swig in a set of directories we
normally use.

refs #66

configure

@@ -644,7 +644,6 @@ GCJ_OPTS
 ac_ct_JAVA_CC
 JAVA_CC_FLAGS
 JAVA_CC
-SWIG_LIB
 SWIG
 PERL
 BISON
@@ -3578,12 +3577,8 @@ $as_echo "no" >&6; }
 fi
 
 
-
-        # Ubuntu has swig 2.0 as /usr/bin/swig2.0
-        for ac_prog in swig swig2.0
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
+# Extract the first word of "swig", so it can be a program name with args.
+set dummy swig; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_path_SWIG+:} false; then :
@@ -3595,7 +3590,8 @@ else
   ;;
   *)
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
+as_dummy="path="/bin:/usr/bin:/usr/local/bin:/sw/bin""
+for as_dir in $as_dummy
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
@@ -3609,6 +3605,7 @@ done
   done
 IFS=$as_save_IFS
 
+  test -z "$ac_cv_path_SWIG" && ac_cv_path_SWIG="swig"
   ;;
 esac
 fi
@@ -3622,79 +3619,6 @@ $as_echo "no" >&6; }
 fi
 
 
-  test -n "$SWIG" && break
-done
-
-        if test -z "$SWIG" ; then
-                 as_fn_error $? "SWIG is required to build.." "$LINENO" 5
-        elif test -n "1.3.29" ; then
-                { $as_echo "$as_me:${as_lineno-$LINENO}: checking SWIG version" >&5
-$as_echo_n "checking SWIG version... " >&6; }
-                swig_version=`$SWIG -version 2>&1 | grep 'SWIG Version' | sed 's/.*\([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\).*/\1/g'`
-                { $as_echo "$as_me:${as_lineno-$LINENO}: result: $swig_version" >&5
-$as_echo "$swig_version" >&6; }
-                if test -n "$swig_version" ; then
-                        # Calculate the required version number components
-                        required=1.3.29
-                        required_major=`echo $required | sed 's/[^0-9].*//'`
-                        if test -z "$required_major" ; then
-                                required_major=0
-                        fi
-                        required=`echo $required | sed 's/[0-9]*[^0-9]//'`
-                        required_minor=`echo $required | sed 's/[^0-9].*//'`
-                        if test -z "$required_minor" ; then
-                                required_minor=0
-                        fi
-                        required=`echo $required | sed 's/[0-9]*[^0-9]//'`
-                        required_patch=`echo $required | sed 's/[^0-9].*//'`
-                        if test -z "$required_patch" ; then
-                                required_patch=0
-                        fi
-                        # Calculate the available version number components
-                        available=$swig_version
-                        available_major=`echo $available | sed 's/[^0-9].*//'`
-                        if test -z "$available_major" ; then
-                                available_major=0
-                        fi
-                        available=`echo $available | sed 's/[0-9]*[^0-9]//'`
-                        available_minor=`echo $available | sed 's/[^0-9].*//'`
-                        if test -z "$available_minor" ; then
-                                available_minor=0
-                        fi
-                        available=`echo $available | sed 's/[0-9]*[^0-9]//'`
-                        available_patch=`echo $available | sed 's/[^0-9].*//'`
-                        if test -z "$available_patch" ; then
-                                available_patch=0
-                        fi
-                        # Convert the version tuple into a single number for easier comparison.
-                        # Using base 100 should be safe since SWIG internally uses BCD values
-                        # to encode its version number.
-                        required_swig_vernum=`expr $required_major \* 10000 \
-                            \+ $required_minor \* 100 \+ $required_patch`
-                        available_swig_vernum=`expr $available_major \* 10000 \
-                            \+ $available_minor \* 100 \+ $available_patch`
-
-                        if test $available_swig_vernum -lt $required_swig_vernum; then
-                                { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: SWIG version >= 1.3.29 is required.  You have $swig_version." >&5
-$as_echo "$as_me: WARNING: SWIG version >= 1.3.29 is required.  You have $swig_version." >&2;}
-                                SWIG=''
-                                 as_fn_error $? "SWIG is required to build.." "$LINENO" 5
-                        else
-                                { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SWIG library" >&5
-$as_echo_n "checking for SWIG library... " >&6; }
-                                SWIG_LIB=`$SWIG -swiglib`
-                                { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SWIG_LIB" >&5
-$as_echo "$SWIG_LIB" >&6; }
-
-                        fi
-                else
-                        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: cannot determine SWIG version" >&5
-$as_echo "$as_me: WARNING: cannot determine SWIG version" >&2;}
-                        SWIG=''
-                         as_fn_error $? "SWIG is required to build.." "$LINENO" 5
-                fi
-        fi
-
 
 if test -n "$ac_tool_prefix"; then
   for ac_prog in javac

configure.ac

@@ -104,7 +104,9 @@ AC_PROG_SED
 AC_PROG_LEX
 AC_PATH_PROG(BISON, bison, bison)
 AC_PATH_PROG(PERL, perl, perl)
-AX_PKG_SWIG(1.3.29, [], [ AC_MSG_ERROR([SWIG is required to build..]) ])
+dnl AX_PKG_SWIG(1.3.29, [], [ AC_MSG_ERROR([SWIG is required to build..]) ])
+AC_PATH_PROG(SWIG, swig, swig, path="/bin:/usr/bin:/usr/local/bin:/sw/bin")
+
 AX_PROG_JAVA_CC(javac)
 
 AC_CHECK_LIB(xml2, main,