When i use cmake to build sim:libcxxtest, it display undefined reference to `NXpthread_setspecific'

[shikoumuzi]

when i use cmake -B build -DBOARD_CONFIG=sim:libcxxtest it can not compile but when i use make to build sim libcxxtest, it is running properly what can i do to solve this problem， thanks

[raiden00pl]

you have to set CONFIG_TLS_NELEM > 0 . It's strange that this problem doesn't occur for make.

[shikoumuzi]

you have to set CONFIG_TLS_NELEM > 0 . It's strange that this problem doesn't occur for make.

thank you for your reply，That's a good way for me to solve the problem

I found that whatever macro definition "in thread.h" encapsulates a layer of "pthread_key_", "tss_key" and other TLS-related functions. It's strange why make can exclude these functions, but cmake can't

[xiaoxiang781216]

@xuxin930 could you check why cmake is different from make?

[xuxin930]

@xuxin930 could you check why cmake is different from make?

sure, I'm working on it

[xuxin930]

hi @raiden00pl @xiaoxiang781216 my guess is that the redefined symbols for sim in cmake do not have an if block. let me fix it

https://github.com/apache/nuttx/blob/62a47994090860b8daea0ab61121bcbcd4448ff1/arch/sim/src/nuttx-names.in#L99-L112 https://github.com/apache/nuttx/blob/62a47994090860b8daea0ab61121bcbcd4448ff1/cmake/nuttx_redefine_symbols.cmake#L78-L94

[raiden00pl]

@xuxin930 good find.

Another problem I have with this configuration (and with libcxx in general) is a lot of warnings during compilation. It looks like compiler flags from here doesn't work: https://github.com/apache/nuttx/blob/62a47994090860b8daea0ab61121bcbcd4448ff1/libs/libxx/libcxx.cmake#L99-L124 I haven't had a chance to look for the cause of this problem yet. I'm not sure if this problem only occurs for me on arch linux

[xuxin930]

I haven't had a chance to look for the cause of this problem yet. I'm not sure if this problem only occurs for me on arch linux

Okay, let me check the toolchain file settings and compile otpions settings again.

[xuxin930]

I haven't had a chance to look for the cause of this problem yet. I'm not sure if this problem only occurs for me on arch linux

hi @raiden00pl there are two errors:

1. the toolchain file is not synchronized and is lagging behind. I will update it first.
2. CMake set_source_files_properties does not perform append, but replaces. 😔

regarding the second one, I have implemented nuttx_set_source_files_properties instead of set_source_files_properties and will submit a batch of bugfixes tomorrow.

[raiden00pl]

@xuxin930 great ! thanks for solving the issues