From 8ac6bf1b4a13899c3a7dbb04bb69117b82f65136 Mon Sep 17 00:00:00 2001
From: Samuel Martin <s.martin49@gmail.com>
Date: Mon, 16 May 2016 22:51:50 +0200
Subject: [PATCH] wscript: make backtrace support depends on execinfo.h
 existence

In some C-libraries (like uclibc), backtrace support is optional, so the
execinfo.h may not exist.

This change adds the check for execinfo.h header and conditionaly enable
backtrace support.

This issue has been triggered by Buildroot farms:
  http://autobuild.buildroot.org/results/391/391e71a988250ea66ec4dbee6f60fdce9eaf2766/build-end.log

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
---
 dbus/sigsegv.c | 8 +++++++-
 wscript        | 6 ++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/dbus/sigsegv.c b/dbus/sigsegv.c
index ee12f918..5cf3d080 100644
--- a/dbus/sigsegv.c
+++ b/dbus/sigsegv.c
@@ -27,7 +27,9 @@
 #include <stdio.h>
 #include <signal.h>
 #include <dlfcn.h>
-#include <execinfo.h>
+#ifdef HAVE_EXECINFO_H
+# include <execinfo.h>
+#endif
 #include <errno.h>
 #ifndef NO_CPP_DEMANGLE
 char * __cxa_demangle(const char * __mangled_name, char * __output_buffer, size_t * __length, int * __status);
@@ -161,12 +163,16 @@ static void signal_segv(int signum, siginfo_t* info, void*ptr) {
         bp = (void**)bp[0];
     }
 #else
+# ifdef HAVE_EXECINFO_H
     jack_error("Stack trace (non-dedicated):");
     sz = backtrace(bt, 20);
     strings = backtrace_symbols(bt, sz);
 
     for(i = 0; i < sz; ++i)
         jack_error("%s", strings[i]);
+# else
+    jack_error("Stack trace not available");
+# endif
 #endif
     jack_error("End of stack trace");
     exit (-1);
diff --git a/wscript b/wscript
index db9e3e7e..206f47e7 100644
--- a/wscript
+++ b/wscript
@@ -483,6 +483,12 @@ def configure(conf):
         defines=['_GNU_SOURCE'],
         mandatory=False)
 
+    # Check for backtrace support
+    conf.check(
+        header_name='execinfo.h',
+        define_name='HAVE_EXECINFO_H',
+        mandatory=False)
+
     conf.recurse('common')
     if Options.options.dbus:
         conf.recurse('dbus')