Fix compilation on libmusl. (arangodb#4686)

neunhoef · web-flow · commit 4f0de2990c77 · 2018-02-27T11:58:04.000+01:00
`blksize_t` is only defined in `sys/types.h`.
diff --git a/3rdParty/iresearch/core/utils/file_utils.hpp b/3rdParty/iresearch/core/utils/file_utils.hpp
@@ -52,6 +52,7 @@
   #define IR_FADVICE_NOREUSE 5
 #else
   #include <unistd.h> // close
+  #include <sys/types.h>
   #define file_blksize_t blksize_t
   #define file_path_delimiter '/'
   #define file_path_t char*
@@ -170,4 +171,4 @@ bool file_sync(int fd) NOEXCEPT;
 NS_END
 NS_END
 
-#endif
+#endif
