Hallo,
Just a heads up: While compiling Gambit, Clang displays the following warning (thousands of times):
```
_gambitgsc.c:27730:1: warning: shifting a negative signed value is undefined [-Wshift-negative-value] ___DEF_NEW_SYM_GLO(___S_xmm5,___S_xmm6,___X3334,376674065,___G_xmm6) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../include/gambit.h:5487:35: note: expanded from macro '___DEF_NEW_SYM_GLO' ___EXP_DATA(___glo_struct,glo) = {___UNB1, ___FIX(hash), 0}; \ ^~~~~~~ ../include/gambit.h:2098:38: note: expanded from macro '___UNB1' #define ___UNB1 ((___CAST(___WORD,-7)<<___TB)+___tSPECIAL) ~~~~~~~~~~~~~~~~~~~^
```
This is indeed undefined behaviour according to the C standard[1]. The resulting `gsi` gets stuck when started and must be killed with SIGKILL.
[1] http://stackoverflow.com/a/22883850/341446
Cheers,