https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70696
--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Compiling the test in comment 0 with -fcoarray=lib -lcaf_single at r244453
fails at link time with
Undefined symbols for architecture x86_64:
"_caf_token.0.3515", referenced from:
__caf_init.1.3517 in ccsoo9HI.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
