From e696757c47f2b2f73ee92cccf4927d827d245309 Mon Sep 17 00:00:00 2001
From: Martin Willi <martin@strongswan.org>
Date: Wed, 6 Dec 2006 13:59:13 +0000
Subject: [PATCH] made backtrace() calls optional to support uClibc

---
 configure.in                             | 2 ++
 src/charon/daemon.c                      | 7 ++++++-
 src/libstrongswan/utils/leak_detective.c | 2 ++
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/configure.in b/configure.in
index ea667b87d0..174d401004 100644
--- a/configure.in
+++ b/configure.in
@@ -96,6 +96,8 @@ dnl ==========================
 dnl  check required libraries
 dnl ==========================
 
+AC_CHECK_FUNCS(backtrace getifaddrs)
+
 AC_HAVE_LIBRARY([gmp],[LIBS="$LIBS"],[AC_MSG_ERROR([GNU Multi Precision library gmp not found])])	
 if test "$ldap" = "true"; then
     AC_HAVE_LIBRARY([ldap],[LIBS="$LIBS"],[AC_MSG_ERROR([LDAP enabled, but library ldap not found])])
diff --git a/src/charon/daemon.c b/src/charon/daemon.c
index 1fd9f9a0ac..f9e913c1ba 100644
--- a/src/charon/daemon.c
+++ b/src/charon/daemon.c
@@ -285,6 +285,7 @@ static void initialize(private_daemon_t *this, bool strict, bool syslog,
  */
 void signal_handler(int signal)
 {
+#ifndef HAVE_BACKTRACE
 	void *array[20];
 	size_t size;
 	char **strings;
@@ -294,13 +295,17 @@ void signal_handler(int signal)
 	strings = backtrace_symbols(array, size);
 
 	DBG1(DBG_DMN, "thread %u received %s. Dumping %d frames from stack:",
-		 signal == SIGSEGV ? "SIGSEGV" : "SIGILL", pthread_self(), size);
+		 pthread_self(), signal == SIGSEGV ? "SIGSEGV" : "SIGILL", size);
 
 	for (i = 0; i < size; i++)
 	{
 		DBG1(DBG_DMN, "    %s", strings[i]);
 	}
 	free (strings);
+#else /* !HAVE_BACKTRACE */
+	DBG1(DBG_DMN, "thread %u received %s",
+		 pthread_self(), signal == SIGSEGV ? "SIGSEGV" : "SIGILL");
+#endif /* HAVE_BACKTRACE */
 	DBG1(DBG_DMN, "killing ourself hard after SIGSEGV");
 	raise(SIGKILL);
 }
diff --git a/src/libstrongswan/utils/leak_detective.c b/src/libstrongswan/utils/leak_detective.c
index f132c51208..efb0554666 100644
--- a/src/libstrongswan/utils/leak_detective.c
+++ b/src/libstrongswan/utils/leak_detective.c
@@ -140,6 +140,7 @@ static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
  */
 static void log_stack_frames(void **stack_frames, int stack_frame_count)
 {
+#ifdef HAVE_BACKTRACE
 	char **strings;
 	size_t i;
 
@@ -152,6 +153,7 @@ static void log_stack_frames(void **stack_frames, int stack_frame_count)
 		DBG1("    %s", strings[i]);
 	}
 	free (strings);
+#endif /* HAVE_BACKTRACE */
 }
 
 /**