大家好，又见面了，我是你们的朋友全栈君。

一、下载jrtplib、jthread、CMake

jrtplib：http://research.edm.uhasselt.be/jori/jrtplib/jrtplib-3.9.1.zip

jthread：http://research.edm.uhasselt.be/jori/jthread/jthread-1.3.1.zip

CMake：https://cmake.org/download/，最新版已经到3.5.1，我用的是3.4.0

注意，如果jrtplib编译过程中报错/usr/bin/ld:cannot find -lIN，参考：http://blog.csdn.net/caoshangpa/article/details/51416500

二、编译

1.jthread编译

修改CMakeLists.txt，如下所示，注意添加的部分。

cmake_minimum_required(VERSION 2.6)

project(jthread)
set(VERSION 1.3.1)
#************************************添加开始******************************
#告知当前使用的是交叉编译方式  
SET(CMAKE_SYSTEM_NAME Linux)  
#设置c编译器  
SET(CMAKE_C_COMPILER "gcc")  
#设置c++编译器  
SET(CMAKE_CXX_COMPILER "g++")
#设置安装路径
set(CMAKE_INSTALL_PREFIX "/usr/local/jrtplibRedHat")
#************************************添加结束******************************
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")
set (_DEFAULT_LIBRARY_INSTALL_DIR lib)
if (EXISTS "${CMAKE_INSTALL_PREFIX}/lib32/" AND CMAKE_SIZEOF_VOID_P EQUAL 4)
	set (_DEFAULT_LIBRARY_INSTALL_DIR lib32)
elseif (EXISTS "${CMAKE_INSTALL_PREFIX}/lib64/" AND CMAKE_SIZEOF_VOID_P EQUAL 8)
	set (_DEFAULT_LIBRARY_INSTALL_DIR lib64)
endif ()

set(LIBRARY_INSTALL_DIR "${_DEFAULT_LIBRARY_INSTALL_DIR}" CACHE PATH "Library installation directory")
if(NOT IS_ABSOLUTE "${LIBRARY_INSTALL_DIR}")
	set(LIBRARY_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/${LIBRARY_INSTALL_DIR}")
endif()

find_package(Threads)
if (NOT CMAKE_USE_WIN32_THREADS_INIT)
	if (NOT CMAKE_USE_PTHREADS_INIT)
		message(FATAL_ERROR "Can find neither pthread support nor Win32 thread support")
	endif (NOT CMAKE_USE_PTHREADS_INIT)
endif (NOT CMAKE_USE_WIN32_THREADS_INIT)

add_subdirectory(src)

cmake CMakeLists.txt

make

make install

2.jrtplib编译

修改CMakeLists.txt，如下所示，注意添加和修改的部分。

cmake_minimum_required(VERSION 2.6)

project(jrtplib)
set(VERSION 3.9.1)
#************************************添加开始******************************
#告知当前使用的是交叉编译方式  
SET(CMAKE_SYSTEM_NAME Linux)  
#设置c编译器  
SET(CMAKE_C_COMPILER "gcc")  
#设置c++编译器  
SET(CMAKE_CXX_COMPILER "g++")
#设置安装路径
set(CMAKE_INSTALL_PREFIX "/usr/local/jrtplibRedHat")
#************************************添加结束******************************
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")

set (_DEFAULT_LIBRARY_INSTALL_DIR lib)
if (EXISTS "${CMAKE_INSTALL_PREFIX}/lib32/" AND CMAKE_SIZEOF_VOID_P EQUAL 4)
	set (_DEFAULT_LIBRARY_INSTALL_DIR lib32)
elseif (EXISTS "${CMAKE_INSTALL_PREFIX}/lib64/" AND CMAKE_SIZEOF_VOID_P EQUAL 8)
	set (_DEFAULT_LIBRARY_INSTALL_DIR lib64)
endif ()

set(LIBRARY_INSTALL_DIR "${_DEFAULT_LIBRARY_INSTALL_DIR}" CACHE PATH "Library installation directory")
if(NOT IS_ABSOLUTE "${LIBRARY_INSTALL_DIR}")
	set(LIBRARY_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/${LIBRARY_INSTALL_DIR}")
endif()

include(CheckCXXCompilerFlag)
include(CheckIncludeFile)
include(CheckIncludeFileCXX)
include(CheckCXXSourceCompiles)
include(TestBigEndian)
include(${PROJECT_SOURCE_DIR}/cmake/Macros.cmake)

find_package(JThread)

set(JRTPLIB_LINK_LIBS "")
#************************************修改开始******************************
set(JRTPLIB_INTERNAL_INCLUDES "/usr/local/jrtplibRedHat/include")
set(JRTPLIB_EXTERNAL_INCLUDES "/usr/local/jrtplibRedHat/include")
#************************************修改结束******************************
add_additional_stuff(JRTPLIB_EXTERNAL_INCLUDES JRTPLIB_LINK_LIBS)

jrtplib_support_option("Support SDES PRIV items" JRTPLIB_SUPPORT_SDESPRIV RTP_SUPPORT_SDESPRIV ON "// No support for SDES PRIV items")
jrtplib_support_option("Support the probation mechanism for a new source" JRTPLIB_SUPPORT_PROBATION RTP_SUPPORT_PROBATION ON "// Do not wait for a number of consecutive packets to validate source")
jrtplib_support_option("Support sending RTCP APP packets" JRTPLIB_SUPPORT_SENDAPP RTP_SUPPORT_SENDAPP ON "// No direct support for sending RTCP APP packets")
jrtplib_support_option("Support sending unknown RTCP packets" JRTPLIB_SUPPORT_RTCPUNKNOWN RTP_SUPPORT_RTCPUNKNOWN OFF "// No support for sending unknown RTCP packets")
jrtplib_support_option("Support memory management mechanism" JRTPLIB_SUPPORT_MEMORYMGMT RTP_SUPPORT_MEMORYMANAGEMENT ON "// No memory management support")

jrtplib_include_test(sys/filio.h RTP_HAVE_SYS_FILIO "// Don't have <sys/filio.h>")
jrtplib_include_test(sys/sockio.h RTP_HAVE_SYS_SOCKIO "// Don't have <sys/sockio.h>")
jrtplib_include_test(ifaddrs.h RTP_SUPPORT_IFADDRS "// No ifaddrs support")

if (JTHREAD_FOUND)
	set(V "ON")
else (JTHREAD_FOUND)
	set(V "OFF")
endif (JTHREAD_FOUND)

option(JTHREAD_ENABLED "Thread support" ${V})
if (JTHREAD_ENABLED)
	set (RTP_SUPPORT_THREAD "#define RTP_SUPPORT_THREAD")
	if (JTHREAD_FOUND)
		save_paths(JRTPLIB_EXTERNAL_INCLUDES "${JTHREAD_INCLUDE_DIRS}")
		save_paths(JRTPLIB_LINK_LIBS "${JTHREAD_LIBRARIES}")
	endif(JTHREAD_FOUND)
else (JTHREAD_ENABLED)
	set (RTP_SUPPORT_THREAD "// No support for JThread was enabled")
endif (JTHREAD_ENABLED)

if (CMAKE_CROSSCOMPILING)
	option (JRTPLIB_USE_BIGENDIAN "Target platform is big endian" ON)
	if (JRTPLIB_USE_BIGENDIAN)
		set(RTP_ENDIAN "#define RTP_BIG_ENDIAN")
	else (JRTPLIB_USE_BIGENDIAN)
		set(RTP_ENDIAN "// Little endian system")
	endif (JRTPLIB_USE_BIGENDIAN)
else (CMAKE_CROSSCOMPILING)
	test_big_endian(JRTPLIB_BIGENDIAN)
	if (JRTPLIB_BIGENDIAN)
		set(RTP_ENDIAN "#define RTP_BIG_ENDIAN")
	else (JRTPLIB_BIGENDIAN)
		set(RTP_ENDIAN "// Little endian system")
	endif (JRTPLIB_BIGENDIAN)
endif (CMAKE_CROSSCOMPILING)

jrtplib_test_feature(socklentest RTP_SOCKLENTYPE_UINT TRUE "// socklen_t is 'int'")
jrtplib_test_feature(ipv4mcasttest RTP_SUPPORT_IPV4MULTICAST FALSE "// No IPv4 multicasting support")
jrtplib_test_feature(salentest RTP_HAVE_SOCKADDR_LEN FALSE "// No sa_len member in struct sockaddr")
jrtplib_test_feature(getloginrtest RTP_SUPPORT_GETLOGINR FALSE "// Not using getlogin_r")
jrtplib_test_feature(ipv6test RTP_SUPPORT_IPV6 FALSE "// No IPv6 support")
jrtplib_test_feature(ipv6mcasttest RTP_SUPPORT_IPV6MULTICAST FALSE "// No IPv6 multicasting support")

check_cxx_source_compiles("#include <stdint.h>\n#include <sys/types.h>\nint main(void) { size_t a = 0 ; size_t b = a; uint32_t x = 0; uint32_t y = x; return 0; }" JRTPLIB_STDINT)
if (JRTPLIB_STDINT)
	set(RTP_INTTYPE_HEADERS "#include <stdint.h>\n#include <sys/types.h>")
else (JRTPLIB_STDINT)
	check_cxx_source_compiles("#include <inttypes.h>\n#include <sys/types.h>\nint main(void) { uint32_t x = 0; uint32_t y = x; return 0; }" JRTPLIB_INTTYPES)
	if (JRTPLIB_INTTYPES)
		set(RTP_INTTYPE_HEADERS "#include <inttypes.h>\n#include <sys/types.h>\n")
	else (JRTPLIB_INTTYPES)
		if (NOT UNIX AND WIN32)
			set(RTP_INTTYPE_HEADERS "#include \"rtptypes_win.h\"")
		else (NOT UNIX AND WIN32)
			set(RTP_INTTYPE_HEADERS "#error Could not find header files that define types like 'uint32_t'. Please edit the file ${PROJECT_BINARY_DIR}/src/rtptypes_unix.h and make sure that the following types are defined: int8_t, uint8_t, int16_t, uint16_t, int32_t, uint32_t, int64_t, uint64_t")
			message("\n\nError: Could not find header files that define types like 'uint32_t'.\nPlease edit the file ${PROJECT_BINARY_DIR}/src/rtptypes_unix.h\nand make sure that the following types are defined: \nint8_t, uint8_t, int16_t, uint16_t, int32_t, uint32_t, int64_t, uint64_t\n\n")
		endif (NOT UNIX AND WIN32)
	endif (JRTPLIB_INTTYPES)
endif (JRTPLIB_STDINT)

if (NOT UNIX AND WIN32)
	set(RTP_WINSOCK_HEADERS "#if defined(WIN32) || defined(_WIN32_WCE)\n	#include <winsock2.h>	\n	#include <ws2tcpip.h>\n#ifndef _WIN32_WCE\n	#include <sys/types.h>\n#endif // _WIN32_WCE\n#endif // WIN32 || _WIN32_WCE\n")
endif (NOT UNIX AND WIN32)

if (NOT UNIX)
	set(JRTPLIB_COMPILE_STATIC ON CACHE BOOL "Flag indicating if a static library should be built, or a dynamic one")
	list(APPEND JRTPLIB_LINK_LIBS "ws2_32")
endif (NOT UNIX)

if (UNIX OR JRTPLIB_COMPILE_STATIC)
	set(JRTPLIB_IMPORT "")
	set(JRTPLIB_EXPORT "")
else (UNIX OR JRTPLIB_COMPILE_STATIC)
	set(JRTPLIB_IMPORT "__declspec(dllimport)")
	set(JRTPLIB_EXPORT "__declspec(dllexport)")
endif (UNIX OR JRTPLIB_COMPILE_STATIC)

configure_file("${PROJECT_SOURCE_DIR}/src/rtptypes.h.in" "${PROJECT_BINARY_DIR}/src/rtptypes.h")
configure_file("${PROJECT_SOURCE_DIR}/src/rtpconfig.h.in" "${PROJECT_BINARY_DIR}/src/rtpconfig.h")

save_paths(JRTPLIB_INTERNAL_INCLUDES "${PROJECT_SOURCE_DIR}/src" "${PROJECT_BINARY_DIR}/src")

add_subdirectory(src)

 
if (UNIX)
	get_target_property(JRTPLIB_LOCAL_LIBRARY_NAME jrtplib-shared LOCATION)
	get_filename_component(JRTPLIB_LIBNAME "${JRTPLIB_LOCAL_LIBRARY_NAME}" NAME)
	set(JRTPLIB_LIBS "${LIBRARY_INSTALL_DIR}/${JRTPLIB_LIBNAME}")
else (UNIX)
	if (JRTPLIB_COMPILE_STATIC)
		get_target_property(JRTPLIB_LOCAL_LIBRARY_NAME jrtplib-static RELEASE_LOCATION)
		get_filename_component(JRTPLIB_LIBNAME_RELEASE "${JRTPLIB_LOCAL_LIBRARY_NAME}" NAME_WE)
		get_target_property(JRTPLIB_LOCAL_LIBRARY_NAME jrtplib-static DEBUG_LOCATION)
		get_filename_component(JRTPLIB_LIBNAME_DEBUG "${JRTPLIB_LOCAL_LIBRARY_NAME}" NAME_WE)
	else (JRTPLIB_COMPILE_STATIC)
		get_target_property(JRTPLIB_LOCAL_LIBRARY_NAME jrtplib-shared RELEASE_LOCATION)
		get_filename_component(JRTPLIB_LIBNAME_RELEASE "${JRTPLIB_LOCAL_LIBRARY_NAME}" NAME_WE)
		get_target_property(JRTPLIB_LOCAL_LIBRARY_NAME jrtplib-shared DEBUG_LOCATION)
		get_filename_component(JRTPLIB_LIBNAME_DEBUG "${JRTPLIB_LOCAL_LIBRARY_NAME}" NAME_WE)
	endif (JRTPLIB_COMPILE_STATIC)
	set(JRTPLIB_LIBS optimized "${LIBRARY_INSTALL_DIR}/${JRTPLIB_LIBNAME_RELEASE}.lib" 
		         debug "${LIBRARY_INSTALL_DIR}/${JRTPLIB_LIBNAME_DEBUG}.lib")
endif (UNIX)

set(JRTPLIB_INCDIRS ${JRTPLIB_EXTERNAL_INCLUDES} ${CMAKE_INSTALL_PREFIX}/include)
set(JRTPLIB_LIBS ${JRTPLIB_LIBS} ${JRTPLIB_LINK_LIBS})
remove_empty(JRTPLIB_INCDIRS)
list(REMOVE_DUPLICATES JRTPLIB_INCDIRS)
remove_empty(JRTPLIB_LIBS)

foreach(ARG ${JRTPLIB_LIBS})
	set(JRTPLIB_LIBS_CMAKECONFIG "${JRTPLIB_LIBS_CMAKECONFIG} \"${ARG}\"")
endforeach()
foreach(ARG ${JRTPLIB_INCDIRS})
	set(JRTPLIB_INCDIRS_CMAKECONFIG "${JRTPLIB_INCDIRS_CMAKECONFIG} \"${ARG}\"")
endforeach()

configure_file("${PROJECT_SOURCE_DIR}/cmake/JRTPLIBConfig.cmake.in" "${PROJECT_BINARY_DIR}/cmake/JRTPLIBConfig.cmake")
install(FILES "${PROJECT_BINARY_DIR}/cmake/JRTPLIBConfig.cmake" DESTINATION ${LIBRARY_INSTALL_DIR}/cmake/JRTPLIB)

if (UNIX)
	foreach(ARG ${JRTPLIB_LIBS})
		set(JRTPLIB_LIBS_PKGCONFIG "${JRTPLIB_LIBS_PKGCONFIG} ${ARG}")
	endforeach()
	foreach(ARG ${JRTPLIB_INCDIRS})
		set(JRTPLIB_INCDIRS_PKGCONFIG "${JRTPLIB_INCDIRS_PKGCONFIG} -I${ARG}")
	endforeach()

	configure_file(${PROJECT_SOURCE_DIR}/pkgconfig/jrtplib.pc.in ${PROJECT_BINARY_DIR}/pkgconfig/jrtplib.pc)
	install(FILES ${PROJECT_BINARY_DIR}/pkgconfig/jrtplib.pc DESTINATION ${LIBRARY_INSTALL_DIR}/pkgconfig)
endif (UNIX)

cmake CMakeLists.txt

make

make install

原创不易，转载请标明出处：https://blog.csdn.net/caoshangpa/article/details/51416822