====== issues ======

===== No known features for CXX compiler =====

<code>
-- Configuring done
CMake Error in src/csync/CMakeLists.txt:
  No known features for CXX compiler

  "GNU"

  version 10.2.1.
</code>

Source was changed a lot. Solution: remove ''build'' directory and run again.

===== warning: jobserver unavailable =====
  make[2]: warning: jobserver unavailable: using -j1.  Add '+' to parent make rule.
  
**Cause:** 
  * When parallel build is used, subsequent call to make was performed using normal <code make>make ...</code> call not <code make>$(MAKE) ...</code>.
  * Even with correct <code make>$(MAKE)</code> usage, it is not working when **$(MAKE)** was used in variable:

<code make>
DUMP_FILE_LIST := "$(MAKE)" -s --no-print-directory ...
%.out:
        $(NO_ECHO)$(DUMP_FILE_LIST) ...
</code>        

Correct usage is to add **+** before **$(MAKE)**:
<code make>DUMP_FILE_LIST := +"$(MAKE)" -s --no-print-directory ...</code>

  The problem is that GNU make, to implement parallel build, requires special options and descriptors to be passed
  over the sub-make calls, this happens automatically when make is invoked directly or through $(MAKE) but if it’s
  indirected through variables, then it’s not happening automatically and the developer has to tell GNU make to
  actually pass the options along.