use CMake's FindBacktrace for backtrace feature detection

1 files changed, 4 insertions, 1 deletions

diff --git a/common/log.c b/common/log.c
index 02aac4c1..f9242bf4 100644
--- a/common/log.c
+++ b/common/log.c
@@ -10,7 +10,6 @@
 #include <errno.h>
 #include <string.h>
 #include <stringop.h>
-#include <execinfo.h>
 
 int colored = 1;
 log_importance_t loglevel_default = L_ERROR;
@@ -137,6 +136,7 @@ bool _sway_assert(bool condition, const char* format, ...) {
 }
 
 void error_handler(int sig) {
+#if SWAY_Backtrace_FOUND
         int i;
         int max_lines = 20;
         void *array[max_lines];
@@ -155,5 +155,8 @@ void error_handler(int sig) {
         for (i = 0; (size_t)i < bt_len; i++) {
                 sway_log(L_ERROR, "Backtrace: %s", bt[i]);
         }
+#else
+        sway_log(L_ERROR, "Error: Signal %d.", sig);
+#endif
         exit(1);
 }