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211cde0923
To make a non-threaded liblzma-only build work with WASI SDK, <signal.h> and mythread_sigmask() were omitted from mythread.h in the commit 81db3b889830. This broke non-threaded full build with Emscripten because src/xz/signals.c needs mythread_sigmask() (liblzma-only build was fine). If __wasm__ is defined, omit <signal.h> and mythread_sigmask() in non-threaded builds only when __EMSCRIPTEN__ isn't defined. Reported-by: Marcus Tillmanns Thanks-to: ChanTsune Fixes: https://github.com/tukaani-project/xz/issues/161 Fixes: 81db3b889830 ("mythread.h: Disable signal functions in builds targeting Wasm + WASI.")