From a065b7daf9aa6a880f7bed8ca4c45dae590de32f Mon Sep 17 00:00:00 2001
From: Jan Wielemaker <jan@swi-prolog.org>
Date: Fri, 24 Jan 2025 16:28:56 +0100
Subject: [PATCH] FIXED: Compilation on single-threaded systems.

---
 src/pl-thread.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/pl-thread.c b/src/pl-thread.c
index 42358f6085..78adbabf2a 100644
--- a/src/pl-thread.c
+++ b/src/pl-thread.c
@@ -7867,14 +7867,14 @@ PRED_IMPL("$thread_local_clause_count", 3, thread_local_clause_count, 0)
 
 #else /*O_PLMT*/
 
-int
+bool
 signalGCThread(int sig)
 { GET_LD
 
   return raiseSignal(LD, sig);
 }
 
-int
+bool
 isSignalledGCThread(DECL_LD int sig)
 { return PL_pending(sig);
 }