STYLE: eliminate most use of _foamSource outside of the etc/ hierarchy

applications/utilities/mesh/conversion/Optional/Allwmake

@@ -1,24 +1,33 @@
 #!/bin/sh
-#
-# Build optional components (eg, may depend on third-party libraries)
 #------------------------------------------------------------------------------
 cd ${0%/*} || exit 1    # Run from this directory
 
+# Optional component: continue-on-error
+# - may not have third-party installed
+export WM_CONTINUE_ON_ERROR=true
+
 # Parse arguments for compilation (at least for error catching)
 . $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments
 
-# Get version info and arch-path
-. $WM_PROJECT_DIR/etc/config.sh/functions
-_foamSource $($WM_PROJECT_DIR/bin/foamEtcFile config.sh/ccmio)
+warning="==> skip ccmio"
 
+if settings=$($WM_PROJECT_DIR/bin/foamEtcFile config.sh/ccmio)
+then
+    . $settings
+else
+    echo "$warning (no config.sh/ccmio settings)"
+    exit
+fi
 
-# Build libccmio (.a|.so)
-$WM_THIRD_PARTY_DIR/makeCCMIO lib # libso
+# Build libccmio (.a|.so) - use static linkage for fewer issues
+$WM_THIRD_PARTY_DIR/makeCCMIO lib
 
 if [ -e $CCMIO_ARCH_PATH/include/libccmio/ccmio.h \
   -a \( -e $CCMIO_ARCH_PATH/lib/libccmio.a -o $FOAM_EXT_LIBBIN/libccmio.so \) ]
 then
     wmake $targetType ccm26ToFoam
+else
+    echo $warning
 fi
 
 #------------------------------------------------------------------------------