Fix compilation on clang

pred_src/util/gopt.h

@@ -25,7 +25,8 @@ read http://www.purposeful.co.uk/tfl/
 #define GOPT_NOARG  0
 #define GOPT_ARG    2
 
-#define gopt_start(...)  (const void*)( const struct { int k; int f; const char *s; const char*const*l; }[]){ __VA_ARGS__, {0}}
+typedef struct { int k; int f; const char *s; const char*const*l; } kfsl;
+#define gopt_start(...)  (const void*)( const kfsl[]){ __VA_ARGS__, {0}}
 #define gopt_option(k,f,s,l)    { k, f, s, l }
 #define gopt_shorts( ... )      (const char*)(const char[]){ __VA_ARGS__, 0 }
 #define gopt_longs( ... )       (const char**)(const char*[]){ __VA_ARGS__, NULL }