cleaner CMake file: add options (#946)

Author: lemire

CMakeLists.txt

@@ -16,7 +16,10 @@ include(cmake/ada-flags.cmake)
 add_subdirectory(src)
 
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/scripts/cmake)
-
+option(ADA_TESTING "Whether to build tests." OFF)
+option(ADA_BENCHMARKS "Whether to build benchmarks." OFF)
+option(ADA_TOOLS "Whether to build tools." OFF)
+option(ADA_BUILD_SINGLE_HEADER_LIB "Whether to build the lib from the single-header files" OFF)
 # There are cases where when embedding ada as a dependency for other CMake
 # projects as submodules or subdirectories (via FetchContent) can lead to
 # errors due to CPM, so this is here to support disabling all the testing

singleheader/CMakeLists.txt

@@ -49,7 +49,9 @@ if (Python3_Interpreter_FOUND)
   add_library(ada-singleheader-source INTERFACE)
   target_sources(ada-singleheader-source INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/ada.cpp>)
   target_link_libraries(ada-singleheader-source INTERFACE ada-singleheader-include-source)
-  add_library(ada-singleheader-lib STATIC $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/ada.cpp>)
+  if (ADA_TESTING OR ADA_BUILD_SINGLE_HEADER_LIB)
+    add_library(ada-singleheader-lib STATIC $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/ada.cpp>)
+  endif(ADA_TESTING OR ADA_BUILD_SINGLE_HEADER_LIB)
 
   if (ADA_TESTING)
     add_executable(demo $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/demo.cpp>)