Roll back unnecessary static linking.

CMakeLists.txt

@@ -4,10 +4,7 @@ project(abcs)
 set(CMAKE_CXX_STANDARD 11)
 
 add_subdirectory(external/libabacus)
-add_library(libabcs STATIC src/ref.cpp src/abacus.cpp src/types.cpp src/util.cpp src/operator_functions.cpp src/trig_functions.cpp src/other_functions.cpp)
-add_executable(abcs src/main.cpp src/string_functions.cpp)
+add_executable(abcs src/main.cpp src/string_functions.cpp src/ref.cpp src/abacus.cpp src/types.cpp src/util.cpp src/operator_functions.cpp src/trig_functions.cpp src/other_functions.cpp)
 
-target_link_libraries(libabcs abacus mpfr readline)
-target_link_libraries(abcs libabcs)
+target_link_libraries(abcs abacus mpfr readline)
 target_include_directories(abcs PUBLIC include)
-target_include_directories(libabcs PUBLIC include)