Build breaks with clang-6.0.1: invalid suffix on literal; C++11 requires a space between literal and identifier

[Yuri]

superpose.cpp:117:10: error: invalid suffix on literal; C++11 requires a space between literal and identifier [-Wreserved-user-defined-literal]
    " v."superpose_version" from "superpose_date" built with SSM v.%i.%i.%i, "
         ^

You need to add spaces:
--- superpose.cpp.orig 2018-07-10 06:15:41 UTC
+++ superpose.cpp
@@ -114,7 +114,7 @@ void printInstructions ( char *argv0 )
 #endif
     " Protein Structure Superposition\n"
     " -------------------------------\n"
- " v."superpose_version" from "superpose_date" built with SSM v.%i.%i.%i, "
+ " v." superpose_version " from " superpose_date " built with SSM v.%i.%i.%i, "
     "MMDB v.%i.%i.%i\n"
     "\n"
     " USAGE:\n"