C++ 用Poky进行交叉编译
我尝试用CMake建立我的跨平台开发环境 只有在尝试使用poky toolchain编译时,我才会遇到以下错误: make[2]:*没有规则使“/opt/poky/1.3/sysroot/armv5te poky-linux-gnueabi/usr/lib/libboost_-thread.so”成为“test”所需。停止 我尝试用两种不同的方法建立CMake工具链,结果是一样的 方法1(简单): 方法2:C++ 用Poky进行交叉编译,c++,boost,cmake,arm,cross-platform,C++,Boost,Cmake,Arm,Cross Platform,我尝试用CMake建立我的跨平台开发环境 只有在尝试使用poky toolchain编译时,我才会遇到以下错误: make[2]:*没有规则使“/opt/poky/1.3/sysroot/armv5te poky-linux-gnueabi/usr/lib/libboost_-thread.so”成为“test”所需。停止 我尝试用两种不同的方法建立CMake工具链,结果是一样的 方法1(简单): 方法2: # this one is important SET( CMAKE_SYSTEM_NA
# this one is important
SET( CMAKE_SYSTEM_NAME Linux )
# this one not so much
SET( CMAKE_SYSTEM_VERSION 1 )
# specify the cross compiler
SET( CROSS_COMPILER_PATH /opt/poky/1.3/sysroots/x86_64-pokysdk-linux/usr/bin/armv5te-poky-linux-gnueabi )
SET( C_CROSS_COMPILER arm-poky-linux-gnueabi- )
FIND_PROGRAM( CCACHE ccache )
IF( CCACHE )
SET( CMAKE_C_COMPILER "${CCACHE}" "${CROSS_COMPILER_PATH}/${C_CROSS_COMPILER}gcc" )
SET( CMAKE_CXX_COMPILER "${CCACHE}" "${CROSS_COMPILER_PATH}/${C_CROSS_COMPILER}g++" )
ELSE( CCACHE )
SET( CMAKE_C_COMPILER "${CROSS_COMPILER_PATH}/${C_CROSS_COMPILER}gcc" "" )
SET( CMAKE_CXX_COMPILER "${CROSS_COMPILER_PATH}/${C_CROSS_COMPILER}g++" "" )
ENDIF(CCACHE)
SET( CMAKE_RANLIB "${CROSS_COMPILER_PATH}/${C_CROSS_COMPILER}ranlib" )
SET( CMAKE_AR "${CROSS_COMPILER_PATH}/${C_CROSS_COMPILER}ar" )
SET( CMAKE_COMPILER_IS_GNUCC 1 )
SET( CMAKE_COMPILER_IS_GNUCXX 1 )
INCLUDE_DIRECTORIES( BEFORE SYSTEM /opt/poky/1.3/sysroots/armv5te-poky-linux-gnueabi/usr/include )
LINK_DIRECTORIES( /opt/poky/1.3/sysroots/armv5te-poky-linux-gnueabi/usr/lib )
# where is the target environment
SET( CMAKE_FIND_ROOT_PATH /opt/poky/1.3/sysroots/armv5te-poky-linux-gnueabi/ )
#search for libraries and header files only in the target environment
SET( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
SET( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
# search for programs in the build host directories
SET( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER )
我的CMake项目是:
cmake_minimum_required( VERSION 2.8.9 )
project ( TEST )
set( BOOST_COMPONENTS thread )
find_package( Boost COMPONENTS ${BOOST_COMPONENTS} )
add_executable( test test.cpp )
target_link_libraries( test ${Boost_THREAD_LIBRARY} )
用于测试的我的cpp代码:
#include <boost/thread/thread.hpp>
#include <iostream>
void hello()
{
std::cout << "Hello!" << std::endl;
}
int main()
{
boost::thread thrd( &hello );
thrd.join();
return 0;
}
#包括
#包括
void hello()
{
std::cout我的问题的解决方案:
解决方案1:
###################################################################################
#
# Cross compile using Poky prebuilt toolchains, you need to source the
# environment first:
#
# $ rm -fr build; mkdir build; cd build
# $ source /opt/poky/1.3/environment-setup-armv5te-poky-linux-gnueabi
# $ cmake -DCMAKE_TOOLCHAIN_FILE=Toolchains/arm-poky-linux-gnueabi-simple.cmake
# $ make
#
###################################################################################
SET(CMAKE_SYSTEM_NAME Linux)
SET(CMAKE_SYSTEM_VERSION 1)
SET(CMAKE_FIND_ROOT_PATH /home/sylvain/Share/dev/Dev2M_CMakeCrossCompile/temp/boost $ENV{OECORE_TARGET_SYSROOT})
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
我的CMake项目:
cmake_minimum_required( VERSION 2.8.9 )
project ( TEST )
set( BOOST_COMPONENTS atomic system thread )
#Very useful to find the source of the problem
#set( Boost_DEBUG on )
#Set the version of gcc in my case that is the source of my problems otherwise the module defines the gcc version of my ubuntu PC
set( Boost_COMPILER "-gcc" )
set( BOOST_ROOT /home/sylvain/Share/dev/Dev2M_CMakeCrossCompile/temp/boost )
find_package( Boost COMPONENTS ${BOOST_COMPONENTS} true )
set( MY_BOOST_LIBRARIES
${Boost_ATOMIC_LIBRARY}
${Boost_SYSTEM_LIBRARY}
${Boost_THREAD_LIBRARY}
)
add_executable( test test.cpp )
target_link_libraries( test ${MY_BOOST_LIBRARIES} )
Boost通常按以下方式链接:
FIND_PACKAGE( Boost COMPONENTS ${TheLibs} REQUIRED )
include_directories(${Boost_INCLUDE_DIR})
link_directories(${Boost_LIBRARY_DIR})
add_executable(test test.cpp)
target_link_libraries( test ${Boost_LIBRARIES} )
请澄清:
“无需制定规则”消息通常表示目标文件不存在。大多数情况下,我会手动检查该文件。如果该文件存在,但仍然出现错误,则可以通过设置链接器标志尝试手动链接
e、 g:
如果仍然不起作用,则使用Verbose标志(通常为Verbose=1)调用make,并查看链接步骤是否正确执行
链接外部库的一般方法是将其添加为自己的目标。优点是您可以将其重新用于同一项目中的多个可执行文件或库。您不会将其用于boost,因为它们通常会为您处理
add_library( libABCDEFG SHARED/STATIC IMPORTED )
set_target_properties( mylib PROPERTIES IMPORTED_LOCATION ${PathToLibrary} )
TARGET_LINK_LIBRARIES(test libABCDEFG)
关于使用工具链使用CMake的另一个提示:
工具链仅包含在项目的第一次创建中(除非您以其他方式包含它)。如果更改工具链中的任何设置,则必须删除CMake缓存并重新执行第一个CMake调用。是否先构建Boost.Thread库?当然可以。我甚至可以使用标准的Makefile进行编译可能:链接目录(${Boost\u library\u DIR})
并删除集(Boost\u REALPATH开启)
?这只是一个测试,没有问题。但是您只将链接目录设置为/opt/poky/1.3/sysroot…
,那么${Boost\u LIBRARY\u DIR}
呢?
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -l${PATH_TO_LIBRARY}")
add_library( libABCDEFG SHARED/STATIC IMPORTED )
set_target_properties( mylib PROPERTIES IMPORTED_LOCATION ${PathToLibrary} )
TARGET_LINK_LIBRARIES(test libABCDEFG)