如何解决Yocto构建系统编译CouchDB适配Erlang v24失败问题

使用meta-erlang层编译CouchDB推荐的Erlang 24版本时编译失败，报错中包含wxWidgets依赖警告，且最终出现sed: can't read .../config.h的致命错误。配方中未声明wxWidgets依赖，疑惑是否需要手动添加wxwidgets-native。

报错信息 #

| configure: WARNING: No GLU headers found, wx will NOT be usable
| configure: WARNING:
|         wxWidgets must be installed on your system.
|
|         Please check that wx-config is in path, the directory
|         where wxWidgets libraries are installed (returned by
|         'wx-config --libs' or 'wx-config --static --libs' command)
|         is in LD_LIBRARY_PATH or equivalent variable and
|         wxWidgets version is 3.0.2 or above.
|
| *********************************************************************
| **********************  APPLICATIONS DISABLED  **********************
| *********************************************************************
|
| jinterface     : Java compiler disabled by user
| observer       : User gave --without-observer option
| odbc           : User gave --without-odbc option
|
| *********************************************************************
| *********************************************************************
| **********************  APPLICATIONS INFORMATION  *******************
| *********************************************************************
|
| wx             : No GLU headers found, wx will NOT be usable
| wxWidgets was not compiled with --enable-webview or wxWebView developer package is not installed, wxWebView will NOT be available
|
|         wxWidgets must be installed on your system.
|
|         Please check that wx-config is in path, the directory
|         where wxWidgets libraries are installed (returned by
|         'wx-config --libs' or 'wx-config --static --libs' command)
|         is in LD_LIBRARY_PATH or equivalent variable and
|         wxWidgets version is 3.0.2 or above.
|
| *********************************************************************
| *********************************************************************
| **********************  DOCUMENTATION INFORMATION  ******************
| *********************************************************************
|
| documentation  :
|                  xsltproc is missing.
|                  fop is missing.
|                  xmllint is missing.
|                  The documentation cannot be built.
|
| | *********************************************************************
| sed: can't read /mnt/project/tmp/work/cortexa7t2hf-neon-ino-linux-musleabi/erlang/25.3.2.8/git/erts/arm-ino-linux-musleabi-gnu/config.h: No such file or directory
| WARNING: exit code 2 from a shell command.

问题分析 #

1. 版本不匹配：报错中显示编译的是Erlang 25.3.2.8，而非目标的24版本，说明meta-erlang层默认拉取的版本不符，需强制指定24版本。
2. wxWidgets警告非致命：wx相关警告是configure阶段的检查提示，若不需要Erlang的GUI工具（如observer），可通过配置选项跳过检查，无需添加wxwidgets-native依赖。
3. 致命错误根源：config.h缺失是编译失败的核心原因，通常是configure阶段未正确生成文件，可能因文档依赖缺失（xsltproc、fop等）或交叉编译环境配置异常导致。

解决方案 #

• 指定Erlang 24版本：在自定义layer中创建erlang_24.bbappend文件，强制使用目标版本：

  ERLANG_VERSION = "24.3.4.14"
  SRC_URI = "git://github.com/erlang/otp.git;tag=OTP-${ERLANG_VERSION}"
  

• 跳过不必要的检查与编译：在bbappend中添加额外配置选项，禁用wx、文档及非必需组件：

  EXTRA_OECONF += "--without-wx --disable-docs --without-observer --without-odbc --without-jinterface"
  

• 修复交叉编译环境：确保目标架构的musl头文件完整，若使用自定义distro，需包含meta-oe等基础层以提供必要的编译工具链。

内容的提问来源于stack exchange，提问作者BlameCapitalism