qcd more BSD compliant

qcd_function

@@ -1,10 +1,17 @@
 
 ## improved CD commands:
+_QCD_FIND=find
+case $OSTYPE in
+    darwin*) 
+        alias tac=gtac
+        _QCD_FIND=gfind    
+     ;;
+esac
 
 function gcd() {
     # guess cd,  find first match in folder, or ask if multiple hits
     local cdto QCDPATH
-    QCDPATH=$( dirname ${BASH_SOURCE[0]} )
+    QCDPATH=$( dirname $( realpath ${BASH_SOURCE[0]} ) )
     cdto=$( python "$QCDPATH"/files/gcd-findmatch.py "$@" )
     [[ -z "$cdto" ]] && return
     \cd "$cdto"
@@ -221,7 +228,7 @@ function scd() {
     } || {
       cdfrom="$2"
     }
-    cdto=$( find "$cdfrom" -mindepth 1 -type d -iname "*$1*" | sort -V | head -n 1 )
+    cdto=$( $_QCD_FIND "$cdfrom" -mindepth 1 -type d -iname "*$1*" | sort -V | head -n 1 )
     echo $cdto
     [[ -z "$cdto" ]] && return
     \cd "$cdto"
@@ -297,7 +304,7 @@ function rmv () {
     # remove empty folders from sources (not last argument)
     for (( i=1; i<=$(($#-1)); i++ ))
     do if [ -d "${!i}" ]
-       then find "${!i}" -depth  -type d -exec rmdir \{\} \;
+       then $_QCD_FIND "${!i}" -depth  -type d -exec rmdir \{\} \;
        fi
     done
 }