cmake: do not install the static libraries by default

Author: illwieckz

CMakeLists.txt

@@ -71,6 +71,10 @@ option(USE_LTO "Enable link-time optimization" OFF)
 # See https://github.com/DaemonEngine/crunch/issues/29
 option(USE_FAST_MATH "Enable fast math (generated images are less likely to be reproducible)" OFF)
 
+if (BUILD_STATIC_LIBCRN)
+	option(INSTALL_STATIC_LIBS "Install static libraries" OFF)
+endif()
+
 if (MSVC)
 	# Enable MSVC parallel compilation.
 	set_cxx_flag("/MP")

crnlib/CMakeLists.txt

@@ -210,7 +210,7 @@ endif()
 add_library(${CRUNCH_LIBRARY_NAME} ${CRUNCH_DEFAULT_LIBRARY_TYPE} $<TARGET_OBJECTS:${CRUNCH_OBJECT_NAME}>)
 set_property(TARGET ${CRUNCH_LIBRARY_NAME} PROPERTY POSITION_INDEPENDENT_CODE 1)
 
-if (BUILD_SHARED_LIBS OR BUILD_STATIC_LIBCRN)
+if (BUILD_SHARED_LIBS OR (BUILD_STATIC_LIBCRN AND INSTALL_STATIC_LIBS))
   install(TARGETS ${CRUNCH_LIBRARY_NAME} DESTINATION lib)
 endif()