From 1c4776dbc3e7d0a73bd62bae78d509c3c54045d6 Mon Sep 17 00:00:00 2001
From: Willy Tarreau <w@1wt.eu>
Date: Sun, 29 Sep 2024 09:37:16 +0200
Subject: [PATCH] BUILD: tools: only include execinfo.h for the real
 backtrace() function

No need to include this possibly non-existing file when using our own
backtrace() implementation, it's only needed for the libc-provided one.
Because of this it's currently not possible to build musl with backtrace
enabled.
---
 include/haproxy/tools.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/haproxy/tools.h b/include/haproxy/tools.h
index 2be18e342..8d1afb5d7 100644
--- a/include/haproxy/tools.h
+++ b/include/haproxy/tools.h
@@ -23,8 +23,8 @@
 #define _HAPROXY_TOOLS_H
 
 #ifdef USE_BACKTRACE
+// for backtrace() on Linux
 #define _GNU_SOURCE
-#include <execinfo.h>
 #endif
 
 #include <string.h>
@@ -47,6 +47,10 @@
 #include <haproxy/protocol-t.h>
 #include <haproxy/tools-t.h>
 
+#if defined(USE_BACKTRACE) && defined(HA_HAVE_WORKING_BACKTRACE)
+#include <execinfo.h>
+#endif
+
 /****** string-specific macros and functions ******/
 /* if a > max, then bound <a> to <max>. The macro returns the new <a> */
 #define UBOUND(a, max)	({ typeof(a) b = (max); if ((a) > b) (a) = b; (a); })