Tests only on cmake option

CMakeLists.txt

@@ -7,7 +7,6 @@ project("GeneticImages"
   LANGUAGES CXX)
 
 file(GLOB SRC_FILES "src/*.cc")
-file(GLOB TEST_FILES "tests/tests.cc")
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")
 
@@ -21,16 +20,23 @@ enable_cxx_compiler_flag_if_supported("-O3")
 enable_cxx_compiler_flag_if_supported("-flto")
 
 # include_directories(<PUBLIC HEADER DIRECTORIES>)
+
+# Main software
 set(TGT genetic-image)
-set(TESTTGT genetic-image-tests)
 add_executable(${TGT} ${SRC_FILES})
-add_executable(${TESTTGT} ${TEST_FILES})
 target_compile_features(${TGT} PRIVATE cxx_std_17)
-target_compile_features(${TESTTGT} PRIVATE cxx_std_17)
 target_include_directories(${TGT} PRIVATE include/genimg)
-target_include_directories(${TESTTGT} PRIVATE include/genimg)
 target_link_libraries(${TGT} ${CONAN_LIBS} stdc++fs)
+
+# Tests
+if(TESTS)
+  set(TESTTGT genetic-image-tests)
+  file(GLOB TEST_FILES "tests/tests.cc")
+  add_executable(${TESTTGT} ${TEST_FILES})
+  target_compile_features(${TESTTGT} PRIVATE cxx_std_17)
+  target_include_directories(${TESTTGT} PRIVATE include/genimg)
   target_link_libraries(${TESTTGT} ${CONAN_LIBS} stdc++fs)
+endif()
 
 # OS specific instructions.
 if(APPLE)

README.org

@@ -73,6 +73,12 @@ following line instead of the second line:
 #+begin_src shell
   conan install .. --build missing --profile <your_profile>
 #+end_src
+If you wish to build the project’s tests in addition to the project itself, you
+can add the option ~-DTESTS=True~ to the first ~cmake~ command to build the
+project’s tests too.
+#+begin_src shell
+  cmake -DCMAKE_CXX_COMPILER=clang++ -DTESTS=True .. -G Ninja
+#+end_src
 
 If you do not wish to build your project with Ninja but with another generator,
 such as Unix Makefiles, simply replace ~Ninja~ in the second to last ~cmake~