diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,9 +12,11 @@ cmake_policy(SET CMP0048 NEW) # set VERSION in project()
 cmake_policy(SET CMP0042 NEW) # enable MACOSX_RPATH by default
 
 include(GNUInstallDirs)
+if(BUILD_TESTING)
 add_subdirectory(test)
 add_subdirectory(demo)
 enable_testing ()
+endif()
 
 if (MSVC)
   add_compile_options(/W4)
@@ -47,6 +49,8 @@ set(LIBINCLUDE
   iir/State.h
   iir/Types.h)
 
+if(BUILD_SHARED_LIBS)
+
 add_library(iir SHARED ${LIBSRC})
 add_library(iir::iir ALIAS iir)
 
@@ -73,6 +77,8 @@ install(TARGETS iir EXPORT iir-targets
 
 configure_file(iir.pc.in iir.pc @ONLY)
 
+else(BUILD_SHARED_LIBS)
+
 add_library(iir_static STATIC ${LIBSRC})
 add_library(iir::iir_static ALIAS iir_static)
 
@@ -97,6 +103,8 @@ install(TARGETS iir_static EXPORT iir-targets
   RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
   PRIVATE_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/iir)
 
+endif(BUILD_SHARED_LIBS)
+
 install(EXPORT iir-targets
   DESTINATION lib/cmake/iir
   NAMESPACE iir::