Add check to error out if prefix is not an absolute path

Signed-off-by: Shreyas Khandekar <[email protected]>

Author: ShreyasKhandekar

configure

@@ -82,10 +82,24 @@ rm -f configured-prefix
 CONFIGURED=""
 if [ "$DEST_DIR_SET" -ne 0 ]
 then
+  case $DEST_DIR in 
+    (/*) pathchk -- "$1";; 
+    (*) 
+    echo "error: expected an absolute directory name for --chpl-home: $DEST_DIR"
+    exit -1
+    ;; 
+  esac
   # Save target installation directory for 'make install' / install.sh
   echo "$DEST_DIR" > configured-chpl-home
   CONFIGURED=configured-chpl-home
 else
+  case $PREFIX in 
+    (/*) pathchk -- "$1";; 
+    (*) 
+    echo "error: expected an absolute directory name for --prefix: $PREFIX"
+    exit -1
+    ;; 
+  esac
   # Save prefix for building the compiler
   echo "$PREFIX" > configured-prefix
   CONFIGURED=configured-prefix