为什么默认情况下 scons 不会在 ~/.scons/site_scons 中查找？
我这里有一个谜：我正在使用Ubuntu SCons（软件包版本1.2.0.d20100117-1）。我有一个目录 $HOME/.scons/site_scons/，所有文档都说它应该是默认搜索的站点目录之一。有一个模块子目录fpga。在我的项目目录中，我有一个 SConstruct 文件，仅包含：
import fpga
奇怪的是：当我运行 scons 时，出现以下错误：
$ scons
scons: Reading SConscript files ...
ImportError: No module named fpga:
File "BLAh/foo/SConstruct", line 1:
import fpga
如果我运行 scons --site-dir=$HOME/.scons/site_scons ，这看起来无论如何都应该是默认的，然后一切都像魅力一样。
另一个奇怪的地方是：当我运行 strace scons 时，它从不尝试 stat 或 open 或 $HOME/.scons -- 事实上，它查找 site_scons 的唯一位置是 ./site_scons。
还有其他人见过这个吗？
I have a mystery here: I'm using Ubuntu SCons (package version 1.2.0.d20100117-1). I have a directory $HOME/.scons/site_scons/, which all the documentation says should be one of the site directories searched by default. There's a module subdirectory fpga. In my project directory, I have an SConstruct file consisting solely of:
import fpga
Here's the oddity: When I just run scons, I get the following error:
$ scons
scons: Reading SConscript files ...
ImportError: No module named fpga:
File "BLAh/foo/SConstruct", line 1:
import fpga
If I run scons --site-dir=$HOME/.scons/site_scons, which seems like it should be the default anyway, then everything works like a charm.
An additional oddity: When I run strace scons, it never tries to stat or open $HOME/.scons -- in fact the only place it looks for site_scons is ./site_scons.
Has anyone else ever seen this?
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您需要更新到更高版本才能让 ~/.scons 自动被 SCons 拾取。
这是 1.2 文档，其中没有提到 ~/.scons
http: //scons.org/doc/1.2.0/HTML/scons-man.html
You'll need to update to a later version to get ~/.scons to automatically get picked up by SCons.
Here's the 1.2 docs, which don't mention the ~/.scons
http://scons.org/doc/1.2.0/HTML/scons-man.html
据我所知， site_scons 文件夹应该与 SConstruct 文件位于同一文件夹中。然后就可以正常工作了。当您拥有计算机范围的 site_scons 文件夹时，可以使用 --site-dir 选项。
As far as I know, the site_scons folder is supposed to be in the same folder as the SConstruct file. Then it works fine. The --site-dir option is there for when you have a machine-wide site_scons folder.
经过一番挖掘后，在 SCons 2.1.0.r5357 上，如果站点初始化文件名为：
$HOME/.scons/site_scons/site_init.py，这将起作用，这当然不是从文档中显而易见。如果这仍然是一个问题，例如使用替代的计算机范围站点，您可以在
_load_site_scons_dir函数的SCons/Scripts/Main.py中添加一些调试输出。After a fair bit of digging, on SCons 2.1.0.r5357, this will work if the site initialisation file is named:
$HOME/.scons/site_scons/site_init.py,This certainly wasn't obvious from the documentation. If this continues to be a problem, for example with an alternative machine wide site, you can add some debug output in
SCons/Scripts/Main.pyin the_load_site_scons_dirfunction.