CMake的FIND_LIBRARY在Windows上运行，但不OS X

Question

相同的代码在Windows上运行的CMake发现库，但在Mac上无法找到them.The代码发现包含目录罚款只是没有图书馆

这里是一个CMake的输出

这里的屏幕是目录结构

这里的屏幕的的CMakeLists.txt

cmake_minimum_required(VERSION 2.6) 

project (GameCreatorEngine) 

# version can be passed into the application from CMake TODO 

set(cmake_test_VERSION_MAJOR 1) 
set(cmake_test_VERSION_MINOR 3) 

# compiler flags 

add_definitions(
    -c 
    -W4 
) 

# SDL LIB INCLUDES 

SET(SDL2_SEARCH_PATHS 
    ${SDL2_ROOT_DIR}     
    ./res/lib/SDL2 
) 

FIND_PATH(SDL2_INCLUDE_DIRS 
    NAMES 
     SDL.h SDL2/SDL.h 
    PATHS 
     ${SDL2_SEARCH_PATHS} 
    PATH_SUFFIXES 
     include 
) 

FIND_LIBRARY(SDL2 
    NAMES 
     SDL2.lib 
    PATHS 
     ${SDL2_SEARCH_PATHS} 
    PATH_SUFFIXES 
     lib 
) 

FIND_LIBRARY(SDL2_MAIN 
    NAMES 
     SDL2main.lib 
    PATHS 
     ${SDL2_SEARCH_PATHS} 
    PATH_SUFFIXES 
     lib 
) 

IF (SDL2_INCLUDE_DIRS AND SDL2_MAIN AND SDL2) 
    SET(SDL2_FOUND TRUE) 
    MESSAGE(STATUS "Looking for SDL2 - found") 
ELSE (SDL2_INCLUDE_DIRS AND SDL2_MAIN AND SDL2) 
    SET(SDL2_FOUND FALSE) 
    MESSAGE(STATUS "Looking for SDL2 - not found") 
ENDIF (SDL2_INCLUDE_DIRS AND SDL2_MAIN AND SDL2) 

# GLEW LIB INCLUDES 

SET(GLEW_SEARCH_PATHS 
    ${GLEW_ROOT_DIR}     
    ./res/lib/GLEW 
) 

FIND_PATH(GLEW_INCLUDE_DIRS 
    NAMES 
     glew.h 
    PATHS 
     ${GLEW_SEARCH_PATHS} 
    PATH_SUFFIXES 
     include 
) 

FIND_LIBRARY(GLEW_LIBRARIES 
    NAMES 
     glew32 
    PATHS 
     ${GLEW_SEARCH_PATHS} 
    PATH_SUFFIXES 
     lib/Release/Win32 
) 

IF (GLEW_INCLUDE_DIRS AND GLEW_LIBRARIES) 
    SET(GLEW_FOUND TRUE) 
    MESSAGE(STATUS "Looking for GLEW - found") 
ELSE (GLEW_INCLUDE_DIRS AND GLEW_LIBRARIES) 
    SET(GLEW_FOUND FALSE) 
    MESSAGE(STATUS "Looking for GLEW - not found") 
ENDIF (GLEW_INCLUDE_DIRS AND GLEW_LIBRARIES) 

# ASSIMP 

SET(ASSIMP_SEARCH_PATHS 
    ${ASSIMP_ROOT_DIR}    
    ./res/lib/assimp 
) 

FIND_PATH(ASSIMP_INCLUDE_DIRS 
    NAMES 
     mesh.h 
    PATHS 
     ${ASSIMP_SEARCH_PATHS} 
    PATH_SUFFIXES 
     include 
) 

FIND_LIBRARY(ASSIMP_LIBRARIES 
    NAMES 
     assimp ASSIMP 
    PATHS 
     ${ASSIMP_SEARCH_PATHS} 
    PATH_SUFFIXES 
     lib 
     lib/x86 
     lib/x64 
) 

IF (ASSIMP_INCLUDE_DIRS AND ASSIMP_LIBRARIES) 
    SET(ASSIMP_FOUND TRUE) 
    MESSAGE(STATUS "Looking for ASSIMP - found") 
ELSE (ASSIMP_INCLUDE_DIRS AND ASSIMP_LIBRARIES) 
    SET(ASSIMP_FOUND FALSE) 
    MESSAGE(STATUS "Looking for ASSIMP - not found") 
ENDIF (ASSIMP_INCLUDE_DIRS AND ASSIMP_LIBRARIES) 

# glm maths lib 
SET(GLM_SEARCH_PATHS 
    ${GLM_ROOT_DIR}    
    ./res/lib/glm 
) 

FIND_PATH(GLM_INCLUDE_DIRS 
    NAMES 
     glm.hpp 
    PATHS 
     ${GLM_SEARCH_PATHS} 
    PATH_SUFFIXES 
     include 
) 

IF (GLM_INCLUDE_DIRS) 
    SET(GLM_FOUND TRUE) 
    MESSAGE(STATUS "Looking for GLM - found") 
ELSE (GLM_INCLUDE_DIRS) 
    SET(ASSIMP_FOUND FALSE) 
    MESSAGE(STATUS "Looking for GLM - not found") 
ENDIF (GLM_INCLUDE_DIRS) 

# OpenGL 
find_package(OpenGL REQUIRED) 

# GameCreatorLibrary 
file(GLOB HDRS ${ENGINE_SOURCE_DIR}src/*.h) 
file(GLOB SRCS ${ENGINE_SOURCE_DIR}src/*.cpp src/*.c) 
add_executable(GameCreatorEngine ${HDRS} ${SRCS}) 

# Define the include DIRs 
include_directories(
    ${SDL2_INCLUDE_DIRS} 
    ${GLEW_INCLUDE_DIRS} 
    ${ASSIMP_INCLUDE_DIRS} 
    ${GLM_INCLUDE_DIRS} 
    ${OPENGL_INCLUDE_DIRS} 
    ${ENGINE_SOURCE_DIR}/headers 
    ${ENGINE_SOURCE_DIR}/sources 
) 

# Define the link libraries 
target_link_libraries(GameCreatorEngine 
    ${SDL2} 
    ${SDL2_MAIN} 
    ${GLEW_LIBRARIES} 
    ${ASSIMP_LIBRARIES} 
    ${OPENGL_LIBRARIES} 
) 

Answer 1

库的正确文件扩展名因不同的平台而异。虽然.lib用于Windows上的静态和dll导入库，但OS X使用不同的命名约定（静态为.a，动态库为.so/.dylib，可能带有lib前缀）。

为了仍允许与所有这些不同的命名惯例运行的代码，find_library希望你完全忽略任何扩展或前缀和只是给图书馆的裸名。

因此，而不是find_library(SDL2 NAMES SDL2.lib [...])你应该只写find_library(SDL2 NAMES SDL2 [...])。

从您的问题看来，您似乎也试图将您的OS X版本与Windows二进制文件（.lib和.dll文件扩展名）关联起来。 这不起作用。您需要为OS X编译一组单独的二进制文件。