Question

我正在使用crosstool-ng为beagleboard-xm构建一个tolchain。构建以下面描述的方式进行：

[INFO]   ================================================== =============== [INFO]检索所需的工具链组件的tarball [INFO]   检索所需的工具链组件的tarball：在0.51s完成（at   00:08）[INFO]   ================================================== =============== [INFO]提取和修补工具链组件[INFO]   提取和修补工具链组件：在7.91s完成（在00:16）   [INFO]   ================================================== =============== [INFO]安装GMP [INFO]安装GMP：在140.48s完成（at   02:36）[INFO]   ================================================== =============== [INFO]安装MPFR [INFO]安装MPFR：在36.01s完成（at   03:13）[信息]   ================================================== =============== [INFO]安装PPL。

`

现在，经过50分钟的编译后，它会出现错误：

[ERROR] configure：error：expat缺失或无法使用“

我安装了所需的软件包（在Ubuntu 10.04中），但错误不是问题。之前我能够到达成功安装编译器的步骤，直到那时没有错误。我想知道是否有办法让工具跳过以前成功的步骤，节省时间？甚至可以用crosstool-ng的方式工作吗？

Answer 1

是的，这是可能的。像这样运行ct-ng

CT_DEBUG_CT_SAVE_STEPS = 1 ct-ng build

在某个步骤崩溃后，只需找到

生成的列表中的步骤

ct-ng list-steps

此时您可以通过运行

恢复构建

RESTART = libc_start_files ct-ng build

Answer 2

是的，目前的crosstool-ng支持此功能。

在menuconfig中启用此功能

代表ct-ng menuconfig，配置Paths and misc options就像这样

───────────────────── Paths and misc options ─────────────────────
[*] Debug crosstool-NG
[ ]   Pause between every steps
[*]   Save intermediate steps
[*]     gzip saved states
[*]   Interactive shell on failed commands

2.在构建时，对于每个成功完成的步骤，您将看到如下内容：

Saving state to restart at step 'xxx'...

3.失败后，修复后，再使用ct-ng LAST_SUCCESSFUL_STETP_NAME+继续构建

我的例子：

CLi@PC-CLI-1 ~/develop/crosstool-ng/crosstool-ng-1.18.0_build
$ ct-ng list-steps
Available build steps, in order:
  - libc_check_config
  - companion_libs_for_build
  - binutils_for_build
  - companion_libs_for_host
  - binutils_for_host
  - cc_core_pass_1
  - kernel_headers
  - libc_start_files
  - cc_core_pass_2
  - libc
  - cc_for_build
  - cc_for_host
  - libelf_for_target
  - binutils_for_target
  - debug
  - test_suite
  - finish
Use "<step>"p>" as action to execute only that step"+<step>"lt;step>" as action to execute up to tha"<step>+"se "<step>+" as action to execute from that step onward.

CLi@PC-CLI-1 ~/develop/crosstool-ng/crosstool-ng-1.18.0_build
$ ct-ng libc+
[INFO ]  Performing some trivial sanity checks
[INFO ]  Build started 20130801.120248
[INFO ]  Building environ'libc'ariables
[EXTRA]  Preparing working directories
[EXTRA]  Restoring state at step 'libc', as requested.
[INFO ]  =================================================================
[INFO ]  Installing C library
[EXTRA]    Configuring C library
[EXTRA]    Building C library
[01:55] /

如需更多解释，请参阅我的帖子：crosstool-ng build for xscale

Answer 3

另一个重要的节省时间 - 在具有多核 CPU 的主机上构建时，为并行作业线程配置 crosstool-ng..

# launch menuconfig

./ct-ng menuconfig

# Path and misc options -> Set Number of parallel jobs - note default is 0!

这应该会显着加快您的构建作业。

显然，根据您的主机系统 CPU 架构相应地设置此值 - 确保至少保留一两个内核可用于主机操作系统和其他线程...

干杯！

一旦发生错误，是否有可能加快crosstool-ng构建？

3 个答案: