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mythread.h: Fix the build on Emscripten when threading is disabled

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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.")
This commit is contained in:
Lasse Collin 2025-11-03 12:41:31 +02:00
parent cbf50a99e3
commit 211cde0923
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GPG Key ID: 38EE757D69184620
1 changed files with 2 additions and 1 deletions
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src/common/mythread.h
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@ -78,7 +78,8 @@ do { \
} while (0)
#if !(defined(_WIN32) && !defined(__CYGWIN__)) && !defined(__wasm__)
#if !(defined(_WIN32) && !defined(__CYGWIN__)) \
&& (!defined(__wasm__) || defined(__EMSCRIPTEN__))
// Use sigprocmask() to set the signal mask in single-threaded programs.
#include <signal.h>