Yocto 解题录:Unable to start bitbake server

时间：2024-04-09 12:55:26

今天尝试重新拿从github上面clone一份yoctoproject进行构建，执行以下步骤

git clone git://git.yoctoproject.org/poky.git poky_new 

cd poky_new

source oe-init-build-env

vim conf/local.conf 将下面变量前的“#”符号删除

        DL_DIR ?= "${TOPDIR}/downloads"
        SSTATE_DIR ?= "${TOPDIR}/sstate-cache"
        TMPDIR = "${TOPDIR}/tmp"

bitbake core-image-minimal

结果报以下错误

ERROR: Unable to start bitbake server (None)
ERROR: Server log for this session (/home/ts/michaelma/2019/poky_new/build/bitbake-cookerdaemon.log):
--- Starting bitbake server pid 27859 at 2019-03-18 17:48:27.381861 ---
Traceback (most recent call last):
  File "/home/ts/michaelma/2019/poky_new/bitbake/lib/bb/cookerdata.py", line 290, in parseBaseConfiguration
    bb.event.fire(bb.event.ConfigParsed(), self.data)
  File "/home/ts/michaelma/2019/poky_new/bitbake/lib/bb/event.py", line 225, in fire
    fire_class_handlers(event, d)
  File "/home/ts/michaelma/2019/poky_new/bitbake/lib/bb/event.py", line 134, in fire_class_handlers
    execute_handler(name, handler, event, d)
  File "/home/ts/michaelma/2019/poky_new/bitbake/lib/bb/event.py", line 106, in execute_handler
    ret = handler(event)
  File "/home/ts/michaelma/2019/poky_new/meta/classes/base.bbclass", line 238, in base_eventhandler
    setup_hosttools_dir(d.getVar('HOSTTOOLS_DIR'), 'HOSTTOOLS', d)
  File "/home/ts/michaelma/2019/poky_new/meta/classes/base.bbclass", line 142, in setup_hosttools_dir
    bb.fatal("The following required tools (as specified by HOSTTOOLS) appear to be unavailable in PATH, please install them in order to proceed:\n  %s" % " ".join(notfound))
  File "/home/ts/michaelma/2019/poky_new/bitbake/lib/bb/__init__.py", line 120, in fatal
    raise BBHandledException()
bb.BBHandledException

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/ts/michaelma/2019/poky_new/bitbake/lib/bb/daemonize.py", line 83, in createDaemon
    function()
  File "/home/ts/michaelma/2019/poky_new/bitbake/lib/bb/server/process.py", line 474, in _startServer
    self.cooker = bb.cooker.BBCooker(self.configuration, self.featureset)
  File "/home/ts/michaelma/2019/poky_new/bitbake/lib/bb/cooker.py", line 210, in __init__
    self.initConfigurationData()
  File "/home/ts/michaelma/2019/poky_new/bitbake/lib/bb/cooker.py", line 375, in initConfigurationData
    self.databuilder.parseBaseConfiguration()
  File "/home/ts/michaelma/2019/poky_new/bitbake/lib/bb/cookerdata.py", line 317, in parseBaseConfiguration
    raise bb.BBHandledException
bb.BBHandledException
ERROR: The following required tools (as specified by HOSTTOOLS) appear to be unavailable in PATH, please install them in order to proceed:
  realpath

虽然从错误提示信息上可以看到缺少“realpath”工具，不过我就很奇怪，我先前clone的yocto执行上面的步骤也没有报错，为什么新版本会报错呢。

由于bitbake是python代码，我就通过不停的添加print语句打印，最终定位到

meta/classes/meta.bbclass文件第142行

Yocto 解题录:Unable to start bitbake server

fatal这个变量在函数内部没有被赋值，且默认参数就是True。那看起来报这个错是由于notfound这个变量不为空导致的。

那就输出上下文把。

Yocto 解题录:Unable to start bitbake server

不过输出语句有异常，会出现输出补全print信息的问题，将所有的print改为bb.warn,之后，打印信息就全部输出了。

从输出的结果看，果然desttool有一个是

${TOPDIR}/tmp/hosttools/realpath

不过这个路径下却没有这个文件

执行

sudo apt-get install realpath

重新source oe-init-build-env

bitbake core-image-minimal

正常构建了

总结：

  1. 新版本的yocto使用到了工具realpath
  2. 所有bitbake使用的工具都在${TOPDIR}/tmp/hosttools/这个路径下
  3. 在bitbake源码里面可以使用print语句进行调试打印
  4. 在bbclass里面建议使用bb.warn进行调试打印，print会出现难以预计的错误

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