CMakeLists.txt --- 导入接口库(预编译库)

以接口库的方式导入预编译库

cmake_minimum_required(VERSION 3.9)

project(test)

set(CMAKE_BUILD_TYPE Debug)

set(CMAKE_C_FLAGS "$ENV{CFLAGS} -O2 -Wall -pthread ")
set(CMAKE_CXX_FLAGS "$ENV{CFLAGS} -O2 -Wall -pthread -std=c++11 -std=gnu++11")

#设置module的查找路径
#list(APPEND CMAKE_MODULE_PATH "/your/module/path")
#找module，找不到报错
#find_package(ffmpeg REQUIRED)

#######################################接口库设置#######################################
#设置预编译库的路径
set(FFMPEG_LIB_PATH ${PROJECT_SOURCE_DIR}/external/ffmpeg/prebuild/lib/${CMAKE_SYSTEM_PROCESSOR}/linux/lib64)
#添加需要的库
set(FFMPEG_LIBS
"\
${FFMPEG_LIB_PATH}/libavfilter.so;\
${FFMPEG_LIB_PATH}/libavformat.so;\
${FFMPEG_LIB_PATH}/libavcodec.so;\
${FFMPEG_LIB_PATH}/libavutil.so;\
${FFMPEG_LIB_PATH}/libswresample.so;\
${FFMPEG_LIB_PATH}/libswscale.so;\
${FFMPEG_LIB_PATH}/libavdevice.so\
")

#x86_64平台编译的ffmpeg依赖libx264-dev libx265-dev库
string(FIND "${CMAKE_SYSTEM_PROCESSOR}" "x86_64" NEED_X264)
if(NEED_X264 GREATER -1)
    string(APPEND FFMPEG_LIBS ";${FFMPEG_LIB_PATH}/libx264.so;${FFMPEG_LIB_PATH}/libx265.so")
endif()
#指定接口库的名字
add_library(ffmpeg INTERFACE IMPORTED GLOBAL)
#设置接口库指向哪些预编译库
set_target_properties(ffmpeg PROPERTIES
INTERFACE_LINK_LIBRARIES
"${FFMPEG_LIBS}"
)
#设置接口库包含的头文件
set_target_properties(ffmpeg PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES
"${PROJECT_SOURCE_DIR}/external/ffmpeg/prebuild/include"
)
#######################################接口库设置#######################################

add_definitions(-fpermissive)

add_executable(haha main.cpp)

target_link_libraries(haha
                      ffmpeg)