Look at a wake write's result in the prototype, as fortified builds ask

Ubuntu's gcc defines _FORTIFY_SOURCE, which marks write's result as one
to use, and a (void) cast does not quiet it: the prototype did not
build there (research 029). Debian's does not define it; the Pi gives
the same error with -D_FORTIFY_SOURCE=3.

1 files changed, 1 insertions, 1 deletions

diff --git a/prototypes/connections/test-async.c b/prototypes/connections/test-async.c
index ad5f15a..e31b1d7 100644
--- a/prototypes/connections/test-async.c
+++ b/prototypes/connections/test-async.c
@@ -38,7 +38,7 @@ static void *write_after_signal(void *context) {
                                      worker->effect.value, &worker->reply,
                                      &worker->revision);
     }
-    (void)write(worker->done, &byte, 1);
+    if (write(worker->done, &byte, 1) < 0) { /* full: its reader is woken already */ }
     return NULL;
 }