ENH: improve handling of ThirdParty packages

- generalize some of the library extensions (.so vs .dylib).
  Provide as wmake 'sysFunctions'

- added note about unsupported/incomplete system support

- centralize detection of ThirdParty packages into wmake/ subdirectory
  by providing a series of scripts in the spirit of GNU autoconfig.
  For example,

      have_boost, have_readline, have_scotch, ...

  Each of the `have_<package>` scripts will generally provide the
  following type of functions:

      have_<package>          # detection
      no_<package>            # reset
      echo_<package>          # echoing

  and the following type of variables:

      HAVE_<package>          # unset or 'true'
      <package>_ARCH_PATH     # root for <package>
      <package>_INC_DIR       # include directory for <package>
      <package>_LIB_DIR       # library directory for <package>

  This simplifies the calling scripts:

      if have_metis
      then
          wmake metisDecomp
      fi

  As well as reducing clutter in the corresponding Make/options:

      EXE_INC = \
          -I$(METIS_INC_DIR) \
          -I../decompositionMethods/lnInclude

      LIB_LIBS = \
          -L$(METIS_LIB_DIR) -lmetis

  Any additional modifications (platform-specific or for an external build
  system) can now be made centrally.

applications/utilities/mesh/manipulation/renumberMesh/Allwmake

@@ -1,38 +1,27 @@
 #!/bin/sh
-cd ${0%/*} || exit 1    # Run from this directory
+cd ${0%/*} || exit 1                            # Run from this directory
+. $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments # (for error catching)
+. $WM_PROJECT_DIR/wmake/scripts/sysFunctions    # General system functions
+. $WM_PROJECT_DIR/wmake/scripts/have_zoltan
 
-# Parse arguments for compilation (at least for error catching)
-. $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments
+#------------------------------------------------------------------------------
 
 unset COMP_FLAGS LINK_FLAGS
 
-if [ -f "${FOAM_LIBBIN}/libSloanRenumber.so" ]
+if [ -f $FOAM_LIBBIN/libSloanRenumber$extLibso ]
 then
     echo "    found libSloanRenumber  --  enabling sloan renumbering support."
-    export LINK_FLAGS="${LINK_FLAGS} -lSloanRenumber"
+    export LINK_FLAGS="$LINK_FLAGS -lSloanRenumber"
 fi
 
-if [ -f "${FOAM_LIBBIN}/libzoltanRenumber.so" ]
+if [ -f $FOAM_LIBBIN/libzoltanRenumber$extLibso ]
 then
-    if [ -z "$ZOLTAN_ARCH_PATH" ]
+    if have_zoltan
     then
-        # Optional: get ZOLTAN_ARCH_PATH
-        if settings=$($WM_PROJECT_DIR/bin/foamEtcFile config.sh/zoltan)
-        then
-            . $settings
-        fi
+        echo "    found libzoltanRenumber  --  enabling zoltan renumbering support."
+        export COMP_FLAGS="$COMP_FLAGS -DHAVE_ZOLTAN"
+        export LINK_FLAGS="$LINK_FLAGS -lzoltanRenumber -L$ZOLTAN_LIB_DIR -lzoltan"
     fi
-
-    for libdir in lib "lib${WM_COMPILER_LIB_ARCH}"
-    do
-        if [ -f "$ZOLTAN_ARCH_PATH/$libdir/libzoltan.a" ]
-        then
-            echo "    found libzoltanRenumber  --  enabling zoltan renumbering support."
-            export COMP_FLAGS="-DFOAM_USE_ZOLTAN"
-            export LINK_FLAGS="${LINK_FLAGS} -lzoltanRenumber -L$ZOLTAN_ARCH_PATH/$libdir -lzoltan"
-            break
-        fi
-    done
 fi
 
 wmake $targetType

applications/utilities/mesh/manipulation/renumberMesh/renumberMesh.C

@@ -55,7 +55,7 @@ Description
 #include "processorMeshes.H"
 #include "hexRef8.H"
 
-#ifdef FOAM_USE_ZOLTAN
+#ifdef HAVE_ZOLTAN
     #include "zoltanRenumber.H"
 #endif
 
@@ -633,7 +633,7 @@ int main(int argc, char *argv[])
 
     // Force linker to include zoltan symbols. This section is only needed since
     // Zoltan is a static library
-    #ifdef FOAM_USE_ZOLTAN
+    #ifdef HAVE_ZOLTAN
         Info<< "renumberMesh built with zoltan support." << nl << endl;
         (void)zoltanRenumber::typeName;
     #endif

applications/utilities/mesh/manipulation/setSet/Allwmake

@@ -1,19 +1,17 @@
 #!/bin/sh
-cd ${0%/*} || exit 1    # Run from this directory
-
-# Parse arguments for compilation (at least for error catching)
-. $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments
+cd ${0%/*} || exit 1                        # Run from this directory
+. $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments # (for error catching)
+. $WM_PROJECT_DIR/wmake/scripts/have_readline
 
+#------------------------------------------------------------------------------
 unset COMP_FLAGS LINK_FLAGS
 
-#
-# use readline if available
-#
-if [ -f /usr/include/readline/readline.h ]
+# Use readline if available
+if have_readline
 then
-    echo "    found <readline/readline.h>  --  enabling readline support."
-    export COMP_FLAGS="-DHAS_READLINE"
-    export LINK_FLAGS="-lreadline"
+    echo "    readline detected - enabling readline support."
+    export COMP_FLAGS="-DHAVE_LIBREADLINE -I$READLINE_INC_DIR"
+    export LINK_FLAGS="-L$READLINE_LIB_DIR -lreadline"
 fi
 
 wmake $targetType

applications/utilities/mesh/manipulation/setSet/setSet.C

@@ -55,10 +55,11 @@ Description
 
 #include <stdio.h>
 
-
-#ifdef HAS_READLINE
+#ifdef HAVE_LIBREADLINE
     #include <readline/readline.h>
     #include <readline/history.h>
+
+    static const char* historyFile = ".setSet";
 #endif
 
 using namespace Foam;
@@ -66,11 +67,6 @@ using namespace Foam;
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 
-#ifdef HAS_READLINE
-static const char* historyFile = ".setSet";
-#endif
-
-
 // Write set to VTK readable files
 void writeVTK
 (
@@ -790,7 +786,7 @@ int main(int argc, char *argv[])
     printAllSets(mesh, Info);
 
     // Read history if interactive
-    #ifdef HAS_READLINE
+    #ifdef HAVE_LIBREADLINE
     if (!batch && !read_history((runTime.path()/historyFile).c_str()))
     {
         Info<< "Successfully read history from " << historyFile << endl;
@@ -872,7 +868,7 @@ int main(int argc, char *argv[])
             }
             else
             {
-                #ifdef HAS_READLINE
+                #ifdef HAVE_LIBREADLINE
                 {
                     char* linePtr = readline("readline>");