configure: Check for HAVE_BACKTRACE and HAVE_EXECINFO_H.

configure.ac

@@ -1137,6 +1137,10 @@ case "${host_cpu}" in
     ;;
 esac
 
+dnl Check for backtrace() support
+AC_CHECK_HEADERS(execinfo.h)
+AC_CHECK_FUNCS(backtrace)
+
 dnl
 dnl  Enable profiling
 dnl

src/misc/objects.c

@@ -1482,7 +1482,7 @@ static void ListChildren( vlc_list_t *p_list, vlc_object_t *p_this, int i_type )
 }
 
 #ifndef NDEBUG
-# if defined(__GLIBC__) || defined(__APPLE__)
+# ifdef (HAVE_EXECINFO_H)
 #  include <execinfo.h>
 # endif
 
@@ -1541,7 +1541,7 @@ void vlc_refcheck (vlc_object_t *obj)
              obj->psz_object_type);
     fflush (stderr);
 
-#if defined(__GLIBC__) || defined(__APPLE__)
+#ifdef HAVE_BACKTRACE
     void *stack[20];
     int stackdepth = backtrace (stack, sizeof (stack) / sizeof (stack[0]));
     backtrace_symbols_fd (stack, stackdepth, 2);

src/misc/threads.c

@@ -83,7 +83,7 @@ static inline unsigned long vlc_threadid (void)
      return v.i;
 }
 
-#if defined(__GLIBC__) || defined(__APPLE__)
+#if HAVE_EXECINFO_H
 # include <execinfo.h>
 #endif
 
@@ -125,7 +125,7 @@ void vlc_pthread_fatal (const char *action, int error,
     fflush (stderr);
 #endif
 
-#if defined(__GLIBC__) || defined(__APPLE__)
+#ifdef HAVE_BACKTRACE
     void *stack[20];
     int len = backtrace (stack, sizeof (stack) / sizeof (stack[0]));
     backtrace_symbols_fd (stack, len, 2);