ENH: remove reliance on OpenFOAM etc/config.sh/functions file.

- similar functionality in etc/tools/ThirdPartyFunctions to improve
  the independence of ThirdParty while reducing clutter in the callers.

- add useGcc function for convenience
- mask seeing our own git-repo when building

STYLE: various items

- eliminate old user-editable configuration in files - now command-line only.
- use *_BUILD_DIR instead of *_BINARY_DIR for more clarity of the purpose
- drop use of '-q' option for wmakeCheckPwd (already has stderr redirect)
- drop checkVersion for makeParaView since it stopped working properly
  with newer paraview version

CONFIG: update list of versions

makeCmake

@@ -35,15 +35,17 @@
 # NO USER-CONFIGURABLE SETTINGS WITHIN THIS FILE
 #------------------------------------------------------------------------------
 # Run from third-party directory only
-cd ${0%/*} && wmakeCheckPwd -q "$WM_THIRD_PARTY_DIR" 2>/dev/null || {
+cd ${0%/*} && wmakeCheckPwd "$WM_THIRD_PARTY_DIR" 2>/dev/null || {
     echo "Error (${0##*/}) : not located in \$WM_THIRD_PARTY_DIR"
     echo "    Check your OpenFOAM environment and installation"
     exit 1
 }
 . etc/tools/ThirdPartyFunctions
 #------------------------------------------------------------------------------
+
 # Special purpose script - no default version.
 unset cmakePACKAGE
+
 #------------------------------------------------------------------------------
 usage() {
     exec 1>&2
@@ -63,7 +65,7 @@ USAGE
     exit 1
 }
 #------------------------------------------------------------------------------
-# Ensure CMake gets the correct C/CC++ compiler
+# Compiler settings for CMake/configure
 [ -n "$WM_CC" ]  && export CC="$WM_CC"
 [ -n "$WM_CXX" ] && export CXX="$WM_CXX"
 
@@ -72,13 +74,10 @@ unset optLink
 while [ "$#" -gt 0 ]
 do
     case "$1" in
-    -h | -help)
-        usage
-        ;;
-    -gcc)
-        export CC=gcc   # use gcc/g++
-        export CXX=g++
-        ;;
+    '') ;;      # Ignore empty
+    -h | -help) usage   ;;
+    -gcc)       useGcc  ;;
+
     -link)
         optLink=true
         ;;
@@ -117,6 +116,7 @@ else
         buildDIR=$buildBASE/$cmakePACKAGE
 
         cd $CMAKE_SOURCE_DIR || exit 1
+        export GIT_DIR=$PWD/.git # Mask seeing our own git-repo
         make distclean 2>/dev/null
 
         rm -rf $buildDIR