Unused link directory during cmake. on Mac OSX

[ai-mannamalai]

Unused link directory during cmake. on Mac OSX

clang++: warning: argument unused during compilation: '-L/usr/local/lib/' [-Wunused-command-line-argument]

This link folder is present in CMakeLists.txt within examples/ sub folders.

cmake_minimum_required(VERSION 3.9)
project(PrimExample)

# specify the C++ standard
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED True)

set(CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES /usr/local/lib ${CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES})

add_executable(prim_example prim_example.cpp)
target_include_directories(prim_example PUBLIC "${CMAKE_SOURCE_DIR}/include")

target_link_libraries(prim_example
                        pthread
                        ssl
                        crypto
                        z)

[ai-mannamalai]

Solution should be

-set(CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES /usr/local/lib ${CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES})
+set(CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES ${CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES})