tree 92bfb25634e925a57f656fddd25cba33f7e8ddc6
parent 862d47dd92491f3bc5064235755fa3de05a07174
author Than McIntosh <thanm@google.com> 1549645106 -0500
committer Than McIntosh <thanm@google.com> 1549902641 +0000

gollvm: restore __sync_bool_compare_and_swap_4 cmake setup

Restore the code that checks for __sync_bool_compare_and_swap_4 at
config time (this was incorrectly removed in CL 160838). While
this function isn't used in libgo now, it is still needed for
libbacktrace.

Change-Id: I5e12c32561cc80a6ab24fe441d255114632d31c5
Reviewed-on: https://go-review.googlesource.com/c/161660
Reviewed-by: Cherry Zhang <cherryyz@google.com>