cmake交叉编译

CMakeLists.txt

#指定交叉编译器路径
set(TOOLSCHAIN_PATH "/home/duapple/work/zigbee/z3_gateway/chiot_smart_home_zigbee/rtl819x/toolchain/msdk-4.4.7-mips-EL-3.10-u0.9.33-m32t-140827")
set(TOOLCHAIN_HOST "${TOOLSCHAIN_PATH}/bin/mips-linux")

set(TOOLCHAIN_CC "${TOOLCHAIN_HOST}-gcc")
set(TOOLCHAIN_CXX "${TOOLCHAIN_HOST}-g++")

#告诉cmake是进行交叉编译
set(CMAKE_CROSSCOMPILING TRUE)

set(CMAKE_SYSTEM_NAME "Linux")

# Define the compiler
set(CMAKE_C_COMPILER ${TOOLCHAIN_CC})
set(CMAKE_CXX_COMPILER ${TOOLCHAIN_CXX})

#库和同头文件查找的路径
set(CMAKE_FIND_ROOT_PATH "${TOOLSCHAIN_PATH}")

aux_source_directory(. SRC_LIST)

include_directories (../include 
                    ../lib/cJSON 
                    ../../mbedtls-2.2.1/include 
                    ../../curl-7.38.0/include 
                    ../../cmake-2.8.12.1/Tests/FindPackageModeMakefileTest/)

# 添加编译参数
add_compile_options(-std=gnu99 -Os -g -fno-pic -mno-abicalls -DEMBEDDED -DCONFIG_RTL_8197F -D__LITTLE_ENDIAN__ -DROM_MEMORY 
                    -DCOMPRESSED_KERNEL -D__KERNEL__ -G 0 -DLZMA_COMPRESS -DMBEDTLS_CONFIG_FILE=<foo.h>)

set (EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR})

#link_libraries("/home/duapple/work/zigbee/z3_gateway/chiot_smart_home_zigbee/rtl819x/users/curl-7.38.0/lib/.libs/libcurl.so")
link_directories(../lib/cJSON 
                /home/duapple/work/zigbee/z3_gateway/chiot_smart_home_zigbee/rtl819x/users/curl-7.38.0/lib/.libs 
                /home/duapple/work/zigbee/z3_gateway/chiot_smart_home_zigbee/rtl819x/users/mbedtls-2.2.1/library 
                /home/duapple/work/zigbee/z3_gateway/chiot_smart_home_zigbee/rtl819x/toolchain/msdk-4.4.7-mips-EL-3.10-u0.9.33-m32t-140827/lib/)

add_executable(ncp_gateway ${SRC_LIST})

# 添加链接库
target_link_libraries(ncp_gateway curl mbedtls mbedx509 mbedcrypto pthread uuid m dl sqlite3 mosquitto ssl cJSON)

注意：
这里的link_libraries和link_directories需要设置在add_executable之前，否则会出现明明添加了动态库的搜索路径，但是找不到库的错误。
当使用link_libraries时，不需要设置target_link_libraries。

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