2 files changed, 10 insertions, 2 deletions
diff --git a/src/htssafe.h b/src/htssafe.h
index 9de63a3..f938094 100644
--- a/src/htssafe.h
+++ b/src/htssafe.h
@@ -175,6 +175,13 @@ static HTS_UNUSED void htssafe_compile_time_check_(void) {
   HTS_IS_NOT_CHAR_BUFFER(B) ? (size_t) -1 : sizeof(B), \
   "overflow while copying '" #B "' to '"#A"'", __FILE__, __LINE__)
 
+/** strnlen replacement (autotools). **/
+static HTS_UNUSED size_t rpl_strnlen(const char *s, size_t maxlen) {
+  size_t i;
+  for(i = 0 ; s[i] != '\0' && i < maxlen ; i++) ;
+  return i;
+}
+
 static HTS_INLINE HTS_UNUSED size_t strlen_safe_(const char *source, const size_t sizeof_source, 
                                                  const char *file, int line) {
   size_t size;
diff --git a/src/httrack.c b/src/httrack.c
index a760300..f231db7 100644
--- a/src/httrack.c
+++ b/src/httrack.c
@@ -69,8 +69,9 @@ static int linput(FILE * fp, char *s, int max);
 #include <unistd.h>
 #endif
 #include <ctype.h>
-#ifdef __linux
+#if (defined(__linux) && defined(HAVE_EXECINFO_H))
 #include <execinfo.h>
+#define USES_BACKTRACE
 #endif
 /* END specific definitions */
 
@@ -878,7 +879,7 @@ static void sig_doback(int blind) {     // mettre en backing
 #define FD_ERR 2
 
 static void print_backtrace(void) {
-#ifdef __linux
+#ifdef USES_BACKTRACE
   void *stack[256];
   const int size = backtrace(stack, sizeof(stack)/sizeof(stack[0]));
   if (size != 0) {