retroshare: fix musl.

srcpkgs/retroshare/patches/musl.patch

@@ -25,3 +25,32 @@
 +#endif // defined(__linux__) && defined(__GLIBC__)
  
  #endif // _STACKTRACE_H_
+--- libretroshare/src/util/rsdir.cc.orig	2017-05-21 00:02:56.024215330 +0200
++++ libretroshare/src/util/rsdir.cc	2017-05-21 00:05:01.129867612 +0200
+@@ -57,6 +57,25 @@
+ #include <errno.h>
+ #endif
+ 
++#ifndef __GLIBC__
++#include <limits.h>
++#include <string.h>
++#include <stdlib.h>
++#include <stdio.h>
++static char * canonicalize_file_name(const char *path)
++{
++       char buf[PATH_MAX] = { };
++
++       snprintf(buf, sizeof(buf) - 1, "%s", path);
++
++       if (!realpath(path, buf))
++               return NULL;
++
++       return strdup(buf);
++}
++#endif
++
++
+ /****
+  * #define RSDIR_DEBUG 1
+  ****/
+