From: Milan Broz <gmazyland@gmail.com>
Date: Mon, 4 May 2026 14:13:26 +0000 (+0000)
Subject: async_posix.h: remove unreachable OPENSSL_SYS_TANDEM
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b391338239f2c3d46e5e9a83f08f4ec6e57fcd70;p=thirdparty%2Fopenssl.git

async_posix.h: remove unreachable OPENSSL_SYS_TANDEM

The top-level #if requires !defined(OPENSSL_SYS_TANDEM):

  #if defined(OPENSSL_SYS_UNIX)                                 \
      && defined(OPENSSL_THREADS) && !defined(OPENSSL_NO_ASYNC) \
      && !defined(__ANDROID__) && !defined(__OpenBSD__)         \
      && !defined(OPENSSL_SYS_TANDEM)

so the nested

  #if defined(OPENSSL_SYS_TANDEM)
  #include <tdmsig.h>
  #else
  #include <ucontext.h>
  #endif

can never select the OPENSSL_SYS_TANDEM condition.

According to discussion on the issue 31074, removal of the second
(unreachable) condition is the way to go.

Fixes #31074

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Eugene Syromiatnikov <esyr@openssl.org>
Reviewed-by: Neil Horman <nhorman@openssl.org>
MergeDate: Thu May  7 20:11:08 2026
(Merged from https://github.com/openssl/openssl/pull/31076)
---

diff --git a/crypto/async/async_local.h b/crypto/async/async_local.h
index b41309ac41d..e1d11134646 100644
--- a/crypto/async/async_local.h
+++ b/crypto/async/async_local.h
@@ -94,11 +94,7 @@ VOID CALLBACK async_start_func_win(PVOID unused);
  */
 #define USE_SWAPCONTEXT
 #endif
-#if defined(OPENSSL_SYS_TANDEM)
-#include <tdmsig.h>
-#else
 #include <ucontext.h>
-#endif
 #ifndef USE_SWAPCONTEXT
 #include <setjmp.h>
 #endif