Update CMakeLists.txt

matching logical statements

CMakeLists.txt

@@ -315,7 +315,7 @@ else()
     add_library(${STATIC_LIB} STATIC ${LIB_SRC})
     if(COMPILER_SUPPORTS_CXX11 AND NOT COMPILER_SUPPORTS_CXX17 OR ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD")
       add_library(backport-static STATIC ${CPP_BACKPORT_SRC})
-    endif(COMPILER_SUPPORTS_CXX11 AND NOT COMPILER_SUPPORTS_CXX17 ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD")
+    endif(COMPILER_SUPPORTS_CXX11 AND NOT COMPILER_SUPPORTS_CXX17 OR ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD")
     add_library(llarpplatform-static STATIC ${LIB_PLATFORM_SRC})
     target_link_libraries(llarpplatform-static ${THREAD_LIB})
     if(COMPILER_SUPPORTS_CXX11 AND NOT COMPILER_SUPPORTS_CXX17 OR ${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD")
@@ -394,4 +394,4 @@ else()
     target_link_libraries(dns ${SHARED_LIB} llarpplatform pthread)
     endif(NOT WITH_STATIC)
   endif(WITH_SHARED)
-endif(SHADOW)
+endif(SHADOW)