From 2445b97a10b0c250375242b2d6e695d30da3214c Mon Sep 17 00:00:00 2001
From: nhmall <nhmall@nethack.org>
Date: Sat, 16 May 2026 08:57:54 -0400
Subject: [PATCH] build fix with hints file linux.500 and musl=1

This fix was suggested by @PPN-SD in the comments on
GitHub issue https://github.com/NetHack/NetHack/issues/1530#issuecomment-4466027729

Resolves #1530
---
 sys/unix/hints/linux.500 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/unix/hints/linux.500 b/sys/unix/hints/linux.500
index 05cb8c956..d4b095e25 100755
--- a/sys/unix/hints/linux.500
+++ b/sys/unix/hints/linux.500
@@ -197,7 +197,10 @@ ifeq "$(CCISCLANG)" "1"
 # clang-specific ends
 else
 # gcc-specific starts
+ifndef MUSL
+# __sighandler_t does not exist in musl
 LIBCFLAGS+=-DSIG_RET_TYPE=__sighandler_t
+endif
 # gcc-specific ends
 endif