add glibc guard for backtrace in cross_os.c

diff --git a/src/cross_os.c b/src/cross_os.c
index 3640b11b9a7307174144d6d2c9770f85d24ca329..3fcd6e898801c8a01e08235f8be27690c783f45a 100644 (file)
--- a/src/cross_os.c
+++ b/src/cross_os.c
@@ -46,7 +46,7 @@ const char* getUserDir () {
 #endif
 }
 
-#if __linux__
+#if defined(__linux__) && defined(__GLIBC__)
 #include <stdio.h>
 #include <execinfo.h>
 #include <signal.h>