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I was wondering if the file threads.h was included in the GCC compiler because I had seen mixed answers online.

The compiler-provided headers that come with gcc can be found in the "ginclude" directory: https://github.com/gcc-mirror/gcc/tree/ ... c/ginclude

"threads.h" is not among them.

klange wrote:The compiler-provided headers that come with gcc can be found in the "ginclude" directory: https://github.com/gcc-mirror/gcc/tree/ ... c/ginclude

Well that directory doesn't include all headers from gcc, the best way to see headers your gcc provides, is to at your gcc toolchain's include folder (for me it's /usr/local/Cellar/x86_64-elf-gcc/12.2.0/lib/gcc/x86_64-elf/12.2.0/include). There is a bunch of other headers (avx512...). But still, "threads.h" is not there