New comment by Ilia1 on void-packages repository

https://github.com/void-linux/void-packages/pull/44774#issuecomment-1628728841

Comment:
I add `configure_args="... -DCMAKE_SYSTEM_PROCESSOR=$XBPS_TARGET_MACHINE"`
Why when specifying the -a flag in xbps-src command does it try to build with gcc?
If I just build libdispatch with the options `cmake -G Ninja -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_SYSTEM_PROCESSOR=aarch64`  the build is successful. 
But if I build via `xbps-src -a aarch64 pkg libdispatch`, the build starts with gcc instead of clang