索引有警告，貌似依赖循环了

[Guozhanxin]

https://club.rt-thread.org/ask/question/8e814576c5e5fa33.html

[mysterywolf]

这个地方背后的问题是：需要把sal impl文件夹的内容分散到LWIP mbedtls等文件夹、软件包中去，集中在sal是没有意义的。这个问题解决了，这个警告也就迎刃而解了。

[ichdream]

确实，在最新的 master 上获取的版本有这个问题：

• 一个是warning，warning: ignoring unsupported character '
• 另外一个就是.env/packages/packages/security/mbedtls/Kconfig:10:error: recursive dependency detected

scons: Reading SConscript files ...
scons: Entering directory `/home/ich/projects/kernel/rt-thread/tools/kconfig-frontends'
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
scons: `.' is up to date.
scons: done building targets.
'home/ich/.env/packages/packages/peripherals/Kconfig:86:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:3:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:4:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:5:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:6:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:7:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:7:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:9:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:9:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:11:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:12:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:13:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:13:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:15:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:16:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:17:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:17:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:19:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:20:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:21:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:21:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:23:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:24:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:25:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:25:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:27:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:28:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:29:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:30:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:30:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:33:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:34:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:34:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:36:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:37:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:38:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:38:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:40:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:41:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:42:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:43:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:43:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:45:warning: ignoring unsupported character '
'home/ich/.env/packages/packages/peripherals/io_input_filter/Kconfig:45:warning: ignoring unsupported character '
/home/ich/.env/packages/packages/iot/pahomqtt/Kconfig:56:warning: config symbol defined without type
/home/ich/.env/packages/packages/security/mbedtls/Kconfig:10:error: recursive dependency detected!
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
/home/ich/.env/packages/packages/security/mbedtls/Kconfig:10:	symbol PKG_USING_MBEDTLS depends on RT_USING_SAL
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
/home/ich/projects/kernel/rt-thread//components/net/sal/Kconfig:1:	symbol RT_USING_SAL is selected by RT_USING_POSIX_SOCKET
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
/home/ich/projects/kernel/rt-thread//components/libc/posix/Kconfig:29:	symbol RT_USING_POSIX_SOCKET is selected by PKG_USING_MBEDTLS


*** End of the configuration.
*** Execute 'make' to start the build or try 'make help'.