CMakeLists.txt: Rework test suite handling

We now support switching the test suite build off using the standard CTest
option BUILD_TESTING.

This allows environments where the test compilation fails to skip it in
a consistent manner.

This also removes the unconditional call to enable_testing() which the
CTest module now does only if BUILD_TESTING is ON.

Co-authored-by: Michal Liszcz <liszcz.michal@gmail.com>

Author: t-b

CMakeLists.txt

@@ -1,7 +1,6 @@
 cmake_minimum_required(VERSION 2.8.12)
 include(CTest)
 
-enable_testing()
 #need to define the version of the library
 set(MAJOR_VERSION "9")
 set(MINOR_VERSION "3")
@@ -32,9 +31,10 @@ include_directories(${CMAKE_CURRENT_BINARY_DIR}/log4tango/include)
 #source code
 add_subdirectory("log4tango")
 add_subdirectory("cppapi")
-if(NOT WIN32)
+
+if(BUILD_TESTING)
     add_subdirectory("cpp_test_suite")
-endif(NOT WIN32)
+endif()
 
 if(WIN32)
     include(configure/cmake_win.cmake)

INSTALL.md

@@ -27,6 +27,7 @@
 - `-DCMAKE_BUILD_TYPE=<Release|Debug>`
 - `-DCMAKE_VERBOSE_MAKEFILE=true`
 - `-DTANGO_USE_USING_NAMESPACE=<ON|OFF>` choose `OFF` for modern builds
+- `-DBUILD_TESTING=<ON|OFF>` Build the test suite (`ON` by default)
 
 Typical output:
 

appveyor.yml

@@ -255,10 +255,10 @@ install:
   - cmd: set PTHREAD_WIN=C:/projects/pthreads-win32/
   #- cmd: cmake -G "%CMAKE_GENERATOR%" -DCMAKE_WINDOWS_EXPORT_ALL_SYMBOLS=TRUE -DBUILD_SHARED_LIBS=TRUE .
   #- cmd: cmake -G "%CMAKE_GENERATOR%" -DCMAKE_WINDOWS_EXPORT_ALL_SYMBOLS=TRUE .
-  - cmd: cmake -G "%CMAKE_GENERATOR%" -DCMAKE_WINDOWS_EXPORT_ALL_SYMBOLS=TRUE -DIDL_BASE="%IDL_BASE%" -DOMNI_BASE="%OMNI_BASE%" -DZMQ_BASE="%ZMQ_BASE%" -DPTHREAD_WIN=%PTHREAD_WIN% .
+  - cmd: cmake -G "%CMAKE_GENERATOR%" -DCMAKE_WINDOWS_EXPORT_ALL_SYMBOLS=TRUE -DIDL_BASE="%IDL_BASE%" -DOMNI_BASE="%OMNI_BASE%" -DZMQ_BASE="%ZMQ_BASE%" -DPTHREAD_WIN=%PTHREAD_WIN% -DBUILD_TESTING=OFF .
   - cmd: cd c:/projects/debug_build
   #- cmd: cmake -G "%CMAKE_GENERATOR%" -DCMAKE_WINDOWS_EXPORT_ALL_SYMBOLS=TRUE -DBUILD_SHARED_LIBS=TRUE -DCMAKE_BUILD_TYPE=Debug .
-  - cmd: cmake -G "%CMAKE_GENERATOR%" -DCMAKE_WINDOWS_EXPORT_ALL_SYMBOLS=TRUE -DCMAKE_BUILD_TYPE=Debug -DIDL_BASE="%IDL_BASE%" -DOMNI_BASE="%OMNI_BASE%" -DZMQ_BASE="%ZMQ_BASE%" -DPTHREAD_WIN=%PTHREAD_WIN% .
+  - cmd: cmake -G "%CMAKE_GENERATOR%" -DCMAKE_WINDOWS_EXPORT_ALL_SYMBOLS=TRUE -DCMAKE_BUILD_TYPE=Debug -DIDL_BASE="%IDL_BASE%" -DOMNI_BASE="%OMNI_BASE%" -DZMQ_BASE="%ZMQ_BASE%" -DPTHREAD_WIN=%PTHREAD_WIN% -DBUILD_TESTING=OFF .
 
 clone_folder: C:\projects\cppTango