cmake: building doc is now a cmake option and off by default

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

CMakeLists.txt

@@ -38,12 +38,14 @@ set (maa_VERSION_STRING ${maa_VERSION_MAJOR}.${maa_VERSION_MINOR}.${maa_VERSION_
 set (CMAKE_SWIG_FLAGS "")
 
 option (GTEST "Build all gtests." OFF)
+option (BUILDDOC "Build all doc." OFF)
 
-if (test)
+if (GTEST)
   enable_testing ()
   add_subdirectory (tests)
 endif ()
 
+if (BUILDDOC)
   # add a target to generate API documentation with Doxygen
   find_package (Doxygen)
   if (DOXYGEN_FOUND)
@@ -54,6 +56,7 @@ if (DOXYGEN_FOUND)
       COMMENT "Generating API documentation with Doxygen" VERBATIM
     )
   endif (DOXYGEN_FOUND)
+endif ()
 
 add_subdirectory (src)
 add_subdirectory (examples)