I received the errors for tail.c shown below when compiling coreutils on
MacOS (11.6). Adding __APPLE__ to the #if defined for poll.h fixes the
issue (see the diff at the bottom). Making this change matches that line
to the one within check_output_alive().
commit 324c188cfd8a1628c260e5003d309613a0c66e57 (August 29, 2022) made
the change to check_output_alive(), but missed the change reported here.
Dennis
(HEAD: aaa306ad76d48b27efd75101d57b6ec5bf90362c)
Error:
CC src/tail.o
src/tail.c:367:17: error: variable has incomplete type 'struct pollfd'
struct pollfd pfd;
^
src/tail.c:367:10: note: forward declaration of 'struct pollfd'
struct pollfd pfd;
^
src/tail.c:370:17: error: use of undeclared identifier 'POLLRDBAND'
pfd.events |= POLLRDBAND; /* Needed for illumos, macos. */
^
src/tail.c:372:7: error: implicit declaration of function 'poll' is
invalid in C99 [-Werror,-Wimplicit-function-declaration]
if (poll (&pfd, 1, 0) >= 0 && (pfd.revents & (POLLERR | POLLHUP)))
^
src/tail.c:372:49: error: use of undeclared identifier 'POLLERR'
if (poll (&pfd, 1, 0) >= 0 && (pfd.revents & (POLLERR | POLLHUP)))
^
src/tail.c:372:59: error: use of undeclared identifier 'POLLHUP'
if (poll (&pfd, 1, 0) >= 0 && (pfd.revents & (POLLERR | POLLHUP)))
^
5 errors generated.
make[2]: *** [src/tail.o] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2
Diff:
diff --git a/src/tail.c b/src/tail.c
index 6c7d59faf..14abf0871 100644
--- a/src/tail.c
+++ b/src/tail.c
@@ -55,7 +55,7 @@
# include <sys/inotify.h>
#endif
-#if defined _AIX || defined __sun || HAVE_INOTIFY
+#if defined _AIX || defined __sun || defined __APPLE__ || HAVE_INOTIFY
# include <poll.h>
#endif
