使用Scons构建时如何处理此错误? [英] How to deal with this error when build with Scons?

问题描述

/usr/bin/ld:build/bsp_src/main.o:未定义的第一个引用符号«_ZN5boost6system15system_categoryEv»

/usr/bin/ld: build/bsp_src/main.o: Undefined first referenced symbol «_ZN5boost6system15system_categoryEv»

///usr/lib/i386-linux-gnu/libboost_system.so.1.54.0:添加符号时出错:命令行缺少DSO

//usr/lib/i386-linux-gnu/libboost_system.so.1.54.0: error adding symbols: DSO missing from command line

SConstruct文件

我正在尝试构建该项目 https://github.com/TTimo/es_core ，并没有足够的经验与骗局

I'm trying to build this project https://github.com/TTimo/es_core, and don't have enought expirience with scons

推荐答案

基于问题中引用的SConstruct文件，您没有在boost_system库中正确链接.您正在执行以下操作:

Based on the SConstruct file referenced in your question, you're not correctly linking in the boost_system library. You're doing it as follows:

env.Append( CCFLAGS = [ '-g', '-lboost_system', ] )

CCFLAGS变量应用于将编译标志传递给编译器. -l标志应传递给链接器，而不是编译器.在SCons中执行此操作的正确方法如下:

The CCFLAGS variable should be used to pass compilation flags to the Compiler. The -l flag should be passed to the Linker, not the Compiler. The correct way to do that in SCons is as follows:

env.Append( LIBS = ['boost_system'] )

注意，我没有添加-l标志，因为SCons以与平台无关的方式为您完成了此操作.

Notice, I dont add the -l flag, as SCons does that for you in a platform-independent manner.

您可能还必须定义库的路径，如下所示:

You may also have to define the path to the library, which is done as follows:

env.Append( LIBPATH = '/put/the/path/here' )

与LIBS一样，您无需将-L标志添加到LIBPATH，因为SCons会添加它.

As with the LIBS, you dont need to add the -L flag to LIBPATH, as SCons will add it.

以下是 SCons构造变量的完整列表.

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