From b2886dd2e93bbef174e57855d3d77368344372db Mon Sep 17 00:00:00 2001
From: Alibek Omarov <a1ba.omarov@gmail.com>
Date: Thu, 5 Mar 2026 02:56:38 +0500
Subject: [PATCH] engine: platform: remove support for glibc's backtrace(), as
 it's unused

---
 engine/platform/posix/crash.h              |  4 --
 engine/platform/posix/crash_glibc.c        | 49 ----------------------
 engine/platform/posix/crash_libbacktrace.c |  2 +-
 engine/platform/posix/crash_posix.c        |  8 ----
 engine/wscript                             |  9 ----
 5 files changed, 1 insertion(+), 71 deletions(-)
 delete mode 100644 engine/platform/posix/crash_glibc.c

diff --git a/engine/platform/posix/crash.h b/engine/platform/posix/crash.h
index 69f86f19..9f91245e 100644
--- a/engine/platform/posix/crash.h
+++ b/engine/platform/posix/crash.h
@@ -19,7 +19,3 @@ GNU General Public License for more details.
 int Sys_CrashDetailsLibbacktrace( int logfd, char *message, int len, size_t max_len );
 qboolean Sys_SetupLibbacktrace( const char *argv0 );
 
-//
-// crash_glibc.c
-//
-int Sys_CrashDetailsExecinfo( int logfd, char *message, int len, size_t max_len );
diff --git a/engine/platform/posix/crash_glibc.c b/engine/platform/posix/crash_glibc.c
deleted file mode 100644
index 6805caf4..00000000
--- a/engine/platform/posix/crash_glibc.c
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
-crash_glibc.c - advanced crashhandler based on glibc's execinfo API
-Copyright (C) 2016 Mittorn
-Copyright (C) 2025 Alibek Omarov
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-*/
-
-// on Glibc (which potentially might not be only Linux) systems we
-// have backtrace() and backtrace_symbols() calls, which replace for us
-// platform-specific code
-#if HAVE_EXECINFO
-#include <execinfo.h>
-#include <signal.h>
-#include "common.h"
-#include "input.h"
-#include "crash.h"
-
-int Sys_CrashDetailsExecinfo( int logfd, char *message, int len, size_t max_len )
-{
-	void *addrs[16];
-	int size = backtrace( addrs, sizeof( addrs ) / sizeof( addrs[0] ));
-	char **syms = backtrace_symbols( addrs, size );
-
-	for( int i = 0; i < size && syms; i++ )
-	{
-		size_t symlen = Q_strlen( syms[i] );
-		char ch = '\n';
-
-		write( logfd, syms[i], symlen );
-		write( logfd, &ch, 1 );
-
-		write( STDERR_FILENO, syms[i], symlen );
-		write( STDERR_FILENO, &ch, 1 );
-
-		len += Q_snprintf( message + len, max_len - len, "%2d: %s\n", i, syms[i] );
-	}
-
-	return len;
-}
-#endif // HAVE_EXECINFO
diff --git a/engine/platform/posix/crash_libbacktrace.c b/engine/platform/posix/crash_libbacktrace.c
index 6f2cdbbf..e3dff2c5 100644
--- a/engine/platform/posix/crash_libbacktrace.c
+++ b/engine/platform/posix/crash_libbacktrace.c
@@ -153,4 +153,4 @@ qboolean Sys_SetupLibbacktrace( const char *argv0 )
 	return g_bt_state != NULL && enable_libbacktrace;
 }
 
-#endif // HAVE_EXECINFO
+#endif // HAVE_LIBBACKTRACE
diff --git a/engine/platform/posix/crash_posix.c b/engine/platform/posix/crash_posix.c
index 4e39781a..5d6f87d3 100644
--- a/engine/platform/posix/crash_posix.c
+++ b/engine/platform/posix/crash_posix.c
@@ -61,14 +61,6 @@ static void Sys_Crash( int signal, siginfo_t *si, void *context )
 	}
 #endif // HAVE_LIBBACKTRACE
 
-#if HAVE_EXECINFO
-	if( !detailed_message )
-	{
-		len = Sys_CrashDetailsExecinfo( logfd, message, len, sizeof( message ));
-		detailed_message = true;
-	}
-#endif // HAVE_EXECINFO
-
 #if !XASH_DEDICATED
 	IN_SetMouseGrab( false );
 #endif
diff --git a/engine/wscript b/engine/wscript
index 48a5ac3e..ab6d4072 100644
--- a/engine/wscript
+++ b/engine/wscript
@@ -9,13 +9,6 @@ from copy import copy
 
 top = '.'
 
-EXECINFO_TEST = '''#include <execinfo.h>
-int main(int argc, char **argv)
-{
-	backtrace(0, 0);
-	backtrace_symbols(0, 0);
-}'''
-
 FFMPEG_CHECK_FRAGMENT='''
 #include <libswresample/swresample.h>
 #include <libavformat/avformat.h>
@@ -152,8 +145,6 @@ def configure(conf):
 		for i in frameworks :
 			conf.check(features='c cprogram', framework=i, uselib_store=i, msg='Checking for %s framework' % i)
 
-	conf.check_cc(fragment=EXECINFO_TEST, msg='Checking for glibc backtrace()', mandatory=False, define_name='HAVE_EXECINFO')
-
 	conf.define('ENGINE_DLL', 1)
 	conf.define_cond('XASH_ENGINE_TESTS', conf.options.ENGINE_TESTS)