wmake: "dwim" option behaviour is now the default if no argument is supplied

i.e. wmake searches up the directory tree to find the Make directory if it is not
in the current directory.

wmake/wmake

@@ -50,7 +50,6 @@ The 'target' is a Makefile target:
   e.g., Make/linux64GccDPOpt/fvMesh.o
 
 or a special target:
-  dwim              search up directories tree for Make sub-directory and build
   all               all subdirectories, uses any Allwmake files if they exist
   exe               build statically linked executable
   lib               build statically linked archive lib (.a)
@@ -86,9 +85,11 @@ do
     esac
 done
 
-#
-# check environment variables
-#
+
+#------------------------------------------------------------------------------
+# Check environment variables
+#------------------------------------------------------------------------------
+
 for check in WM_OPTIONS WM_LINK_LANGUAGE WM_DIR
 do
     eval test "\$$check" || {
@@ -103,13 +104,13 @@ done
 [ "$1" = exe -o \( "$WM_PROJECT" -a "$WM_PROJECT_DIR" \) ] || {
     echo "$Script error:" 1>&2
     echo "    environment variable \$WM_PROJECT or \$WM_PROJECT_DIR not set" 1>&2
-    echo  "   while building project library" 1>&2
+    echo "    while building project library" 1>&2
     exit 1
 }
 
 
 #------------------------------------------------------------------------------
-# Select the version of make to be used
+# Select the version of make use
 #------------------------------------------------------------------------------
 
 # set WM_NCOMPPROCS automatically when both WM_HOSTS and WM_SCHEDULER are set
@@ -169,8 +170,30 @@ then
 fi
 
 
+#------------------------------------------------------------------------------
+# Recurse the application directories tree
+#------------------------------------------------------------------------------
+
+if [ "$makeType" = all ]
+then
+    if [ -e Allwmake ]
+    then
+        ./Allwmake
+        exit $?
+    elif [ ! -d $MakeDir ]
+    then
+        # FOAM_APPS=$(find . -maxdepth 1 \( -type d -a ! -name "." -a ! -name Optional -a ! -name Make \)  -printf "%f ")
+        # avoid 'find' with '-printf' ... not entirely portable
+        FOAM_APPS=$(for d in *; do [ -d "$d" -a "$d" != Optional -a "$d" != Make ] && echo "$d"; done | xargs)
+        $make -k -f $WM_DIR/MakefileApps FOAM_APPS="$FOAM_APPS"
+        exit $?
+    fi
+fi
+
+
 #------------------------------------------------------------------------------
 # Search up directories tree for the Make sub-directory and build there
+# Also check the existance of the 'files' file
 #------------------------------------------------------------------------------
 
 unset dir
@@ -189,18 +212,22 @@ find_target()
 {
     expandpath $1
 
-    if [ "$exPath" = "$WM_PROJECT_DIR" -o "$exPath" = "$HOME" -o "$exPath" = "/" ]; then
+    if [ "$exPath" = "$WM_PROJECT_DIR" -o "$exPath" = "$HOME" -o "$exPath" = "/" ]
+    then
         echo "$Script error: could not find Make directory"
     elif [ -d "$1/Make" ]; then
-        echo Target $1
+        echo "    Found target directory " $1
         dir=$1
     else
         find_target "$1/.."
     fi
 }
 
-if [ "$makeType" = dwim ]
+if [ ! -d $MakeDir ]
 then
+    echo "$Script: '$MakeDir' directory does not exist in $PWD" 1>&2
+    echo "    Searching up directories tree for Make directory"
+
     find_target .
     makeType=
 
@@ -214,41 +241,16 @@ then
 fi
 
 
-#------------------------------------------------------------------------------
-# Recurse the application directories tree
-#------------------------------------------------------------------------------
-
-if [ "$makeType" = all ]
-then
-    if [ -e Allwmake ]
-    then
-        ./Allwmake
-        exit $?
-    elif [ ! -d $MakeDir ]
-    then
-        # FOAM_APPS=$(find . -maxdepth 1 \( -type d -a ! -name "." -a ! -name Optional -a ! -name Make \)  -printf "%f ")
-        # avoid 'find' with '-printf' ... not entirely portable
-        FOAM_APPS=$(for d in *; do [ -d "$d" -a "$d" != Optional -a "$d" != Make ] && echo "$d"; done | xargs)
-        $make -k -f $WM_DIR/MakefileApps FOAM_APPS="$FOAM_APPS"
-        exit $?
-    fi
-fi
-
-
-#------------------------------------------------------------------------------
-# Require the existence of the 'Make' directory and 'files' file
-#------------------------------------------------------------------------------
-
-[ -d $MakeDir ] || {
-    echo "$Script error: '$MakeDir' directory does not exist in $PWD" 1>&2
-    exit 1
-}
-
 [ -r $MakeDir/files ] || {
     echo "$Script error: file '$MakeDir/files' does not exist in $PWD" 1>&2
     exit 1
 }
 
+
+#------------------------------------------------------------------------------
+# Transform options
+#------------------------------------------------------------------------------
+
 # transform "all" or no option to "libso" if that looks appropriate or remove it
 # so that the call to make builds the application
 if [ "$makeType" = all -o "$makeType" = "" ]
@@ -261,8 +263,11 @@ then
 fi
 
 
+#------------------------------------------------------------------------------
 # Spawn a sub-shell and unset MAKEFLAGS in that sub-shell to avoid
 # files and options being built in parallel
+#------------------------------------------------------------------------------
+
 (
     cd $MakeDir
     unset MAKEFLAGS