Merge remote-tracking branch 'lethosor/osx-libstdc++'

Also update NEWS

NEWS

@@ -2,6 +2,7 @@ DFHack Future
     Internals
         plugins will not be loaded if globals they specify as required are not located (should prevent some crashes)
     Fixes
+        Fixed numerous (mostly Lua-related) crashes on OS X by including a more up-to-date libstdc++
         advfort works again
         devel/export-dt-ini: Updated for 0.40.20+
         digfort: now checks file type and existence

library/CMakeLists.txt

@@ -306,6 +306,12 @@ IF(UNIX)
                 DESTINATION .)
         install(PROGRAMS ${dfhack_SOURCE_DIR}/package/darwin/dfhack-run
                 DESTINATION .)
+        OPTION(INSTALL_NEW_LIBSTDCXX "Install a version of libstdc++ from GCC 4.5.4 to fix various crashes" ON)
+        IF(INSTALL_NEW_LIBSTDCXX)
+            execute_process(COMMAND bunzip2 --keep --force ${dfhack_SOURCE_DIR}/package/darwin/libstdc++.6.dylib.bz2)
+            install(PROGRAMS ${dfhack_SOURCE_DIR}/package/darwin/libstdc++.6.dylib
+                DESTINATION ./hack/)
+        ENDIF(INSTALL_NEW_LIBSTDCXX)
     else()
         # On linux, copy our version of the df launch script which sets LD_PRELOAD
         install(PROGRAMS ${dfhack_SOURCE_DIR}/package/linux/dfhack

package/darwin/.gitignore

@@ -0,0 +1 @@
+libstdc++.6.dylib