From 99d7ec51a781a8212b6c05ecedd7d6a8d194ce7e Mon Sep 17 00:00:00 2001
From: Sertonix <sertonix@posteo.net>
Date: Tue, 28 Oct 2025 17:55:50 +0100
Subject: [PATCH] Use execinfo.h only on glibc
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libunwind could also work on musl but that would require more drastic
code changes

Github-ID: https://github.com/ibm-s390-linux/s390-tools/pull/193
Signed-off-by: Sertonix <sertonix@posteo.net>
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
---
 libutil/util_panic.c | 8 +++++++-
 zdev/src/misc.c      | 6 ++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/libutil/util_panic.c b/libutil/util_panic.c
index c841c19a..b045eff7 100644
--- a/libutil/util_panic.c
+++ b/libutil/util_panic.c
@@ -9,12 +9,14 @@
  * it under the terms of the MIT license. See LICENSE for details.
  */
 
-#include <execinfo.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/resource.h>
 #include <sys/time.h>
+#ifdef __GLIBC__
+#include <execinfo.h>
+#endif
 
 #include "lib/util_base.h"
 #include "lib/util_panic.h"
@@ -24,6 +26,7 @@
  *
  * To get symbols, link the code with "-rdynamic".
  */
+#ifdef __GLIBC__
 static void print_backtrace(void)
 {
 	void *array[256];
@@ -42,6 +45,9 @@ static void print_backtrace(void)
 
 	free(strings);
 }
+#else
+static void print_backtrace(void) {}
+#endif
 
 /*
  * Check for core ulimit
diff --git a/zdev/src/misc.c b/zdev/src/misc.c
index 221d94b7..b7f082ef 100644
--- a/zdev/src/misc.c
+++ b/zdev/src/misc.c
@@ -10,7 +10,9 @@
 #include <ctype.h>
 #include <dirent.h>
 #include <errno.h>
+#ifdef __GLIBC__
 #include <execinfo.h>
+#endif
 #include <limits.h>
 #include <signal.h>
 #include <stdarg.h>
@@ -1191,6 +1193,7 @@ void line_free(int argc, char **argv)
 #define BACKTRACE_MAX	32
 
 /* Used for debugging. */
+#ifdef __GLIBC__
 void print_trace(void)
 {
 	void *bt[BACKTRACE_MAX];
@@ -1204,6 +1207,9 @@ void print_trace(void)
 		fprintf(stderr, "DEBUG:  %s\n", bt_sym[i]);
 	free(bt_sym);
 }
+#else
+void print_trace(void) {}
+#endif
 
 /* Return a textual representation of @config. */
 const char *config_to_str(config_t config)