diff --git a/.gitignore b/.gitignore
index 7b6765fd..04e2da49 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
+.projectile
 .build
 compile_commands.json
diff --git a/cmake/xo_macros/xo_cxx.cmake b/cmake/xo_macros/xo_cxx.cmake
index 3f683129..4533f929 100644
--- a/cmake/xo_macros/xo_cxx.cmake
+++ b/cmake/xo_macros/xo_cxx.cmake
@@ -1,6 +1,7 @@
+option(XO_ENABLE_EXAMPLES "enable building example programs" OFF)
 
 macro(xo_cxx_config_message)
-    message(STATUS "GUESSED_CMAKE_CMD=cmake -DXO_CMAKE_CONFIG_EXECUTABLE=${XO_CMAKE_CONFIG_EXECUTABLE} -DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD} -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX} -DCMAKE_MODULE_PATH=${CMAKE_MODULE_PATH} -DCMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH} -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} -DCMAKE_INSTALL_DOCDIR=${CMAKE_INSTALL_DOCDIR} -B ${CMAKE_BINARY_DIR}")
+    message(STATUS "GUESSED_CMAKE_CMD=cmake -DXO_CMAKE_CONFIG_EXECUTABLE=${XO_CMAKE_CONFIG_EXECUTABLE} -DENABLE_TESTING=${ENABLE_TESTING} -DXO_ENABLE_EXAMPLES=${XO_ENABLE_EXAMPLES} -DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD} -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX} -DCMAKE_MODULE_PATH=${CMAKE_MODULE_PATH} -DCMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH} -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} -DCMAKE_INSTALL_DOCDIR=${CMAKE_INSTALL_DOCDIR} -B ${CMAKE_BINARY_DIR}")
     message(STATUS "XO_CMAKE_CONFIG_EXECUTABLE=${XO_CMAKE_CONFIG_EXECUTABLE}")
     message(STATUS "CMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}")
 endmacro()
@@ -52,11 +53,7 @@ macro(xo_cxx_toplevel_options2)
 endmacro()
 
 macro(xo_cxx_toplevel_options3)
-    enable_language(CXX)
-    xo_toplevel_compile_options()
-    enable_testing()
-    add_custom_target(all_libraries)
-    add_custom_target(all_utest_executables)
+    xo_cxx_toplevel_options2()
     xo_toplevel_config2()
 endmacro()