关于SCONS的ARGUMENTS的问题

乌月龙井 2017-08-11 03:08:47



platform = ARGUMENTS.get('platform','pc')  

  

if platform == 'arm':  

  

    EXE_PATH = '/opt/arm-2007q1/bin'    

    PREFIX = 'arm-none-linux-gnueabi-'    

    ARMCC = PREFIX + 'gcc'    

    ARMAS = PREFIX + 'gcc'    

    ARMAR = PREFIX + 'ar'    

    ARMLINK = PREFIX + 'gcc'    

    ARMSIZE = PREFIX + 'size'    

    ARMOBJDUMP = PREFIX + 'objdump'    

    ARMOBJCPY = PREFIX + 'objcpy'    

  

    env = Environment (AS = ARMAS,    

                       CC = ARMCC,    

                       AR = ARMAR,    

                       LINK = ARMLINK)    

    env.PrependENVPath ('PATH',EXE_PATH)  

  

elif platform == 'pc':  

    env = Environment()    

else:  

    pass  

  

env.Program(source = src, target = 'hello_world')

代码如上，感觉ARGUMENTS是接受的入参，但是在网上没有查到关于这个ARGUMENTS的资料，有知情的求链接或者讲解

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赵4老师 2017-08-11

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VS IDE中，在不明白的符号上点鼠标右键，选转到定义。

SCons是一种软件构建工具，它是我们大家都知道并喜欢的经典“ Make”构建工具的替代品。 SCons是作为Python脚本和一组模块实现的，而SCons“配置文件”实际上是作为Python脚本执行的。这为SCons提供了许多其他软件构建工具所没有的强大功能。我们提供了三种不同用途的SCons，用于不同目的。 -scons软件包是安装SCons的基本软件包。如果您只想试用SCons，则不需要任何其他软件包。 -scons-local程序包作为SCons独立执行，位于本地目录之外。它打算放到其他软件的软件包中并随其一起提供，以用于使用SCons进行构建，但不是必需的安装。 -scons-src软件包是完整的源代码树，包括用于打包SCons的所有内容以及所有回归测试。

# CRP Open source C++ Implementation of Customizable Route Planning (CRP) by Delling et al. This project was part of a practical course at Karlsruhe Institute of Technology (KIT). Requirements ============ In order to build CRP you need to have the following software installed: - Boost C++ Library (http://www.boost.org), more specifically Boost Iostreams. - Scons (http://scons.org) - g++ >= 4.8 (https://gcc.gnu.org) Building CRP ============ If the Boost Library is not in your PATH, make sure to edit the *SConstruct* file in the root directory to point the build script to the correct location of Boost. There is a section *Libraries* in the *SConstruct* file where you can specify the paths. Once you have installed all the software packages listed above, you can build the CRP programs by typing ``` scons --target=CRP --optimize=Opt -jX ``` into your terminal where `X` is the number of cores you want to use for building the project. If you want to use a specific g++ compiler version you can add `--compiler=g++-Version`. We also support a debug and profiling build that you can call with `--optimize=Dbg` and `--optimize=Pro` respectively. This command will build three programs in the folder *deploy*: - *osmparser*: Used to parse an OpenStreetMap (OSM) bz2-compressed map file. Call it with `./deploy/osmparser path_to_osm.bz2 path_to_output.graph.bz2` - *precalculation*: Used to build an overlay graph based on a given partition. Call it with `./deploy/precalculation path_to_graph path_to_mlp output_directory`. Here, *path_to_mlp* is the path to a *MultiLevelPartition* file for the graph that you need to provide. For more details, take a look into our project documentation. - *customization*: Used to precompute the metric weights for the overlay graph. Call it with `./deploy/customization path_to_graph path_to_overlay_graph metric_output_directory metric_type`. We currently support the following metric types: *hop* (number of edges traversed), *time* and *dist*.

判断是否需要重新编译 SCons很智能，只会编译需要编译的内容。比如我刚执行完scons，再次执行，则会提示scons: . is up to date.。那么他是如何做到的呢？也不复杂，依赖一个Decider的方法，以及一个.sconsign.dblite文件。默认情况下，如果文件的md5值改变了，才会重新编译。每次编译，SCons都会把md5存起来，再次执行时，如果md5没变，则不需要rebuild。如果我们不希望使用md5，而是使用文件修改时间呢？很简单，增加Decider('timest

scons 命令行命令传递

一、scons 外部自定义参数传入。

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