On Oct 16 03:12, Jeffrey Walton wrote:
> Hi Everyone,
>
> I'm trying to build Emacs on Cygwin. I use the platform as a test bed
> because of Newlib. Emacs is failing with:
>
> gcc -DHAVE_CONFIG_H -I. -I../lib -I../src -I../src
> -I/usr/local/include -DNDEBUG -pthread -D_XOPEN_SOURCE=600 -m64 -MT
> close-stream.o -MD -MP -MF .deps/close-stream.Tpo -c -o close-stream.o
> close-stream.c
> In file included from /usr/include/sys/signal.h:22:0,
> from /usr/include/signal.h:6,
> from ./signal.h:52,
> from ./sys/select.h:107,
> from /usr/include/sys/time.h:47,
> from ./sys/time.h:39,
> from ./sys/select.h:86,
> from /usr/include/sys/types.h:68,
> from ./sys/types.h:28,
> from ./fcntl.h:50,
> from binary-io.h:23,
> from binary-io.c:3:
> /usr/include/cygwin/signal.h:175:3: error: unknown type name ‘pthread_attr_t’
> pthread_attr_t *sigev_notify_attributes; /* notification attributes */
> ^~~~~~~~~~~~~~
>
> Examining /usr/include/cygwin/signal.h around 175, I see:
>
> typedef struct sigevent
> {
> sigval_t sigev_value; /* signal value */
> int sigev_signo; /* signal number */
> int sigev_notify; /* notification type */
> void (*sigev_notify_function) (sigval_t); /* notification function */
> pthread_attr_t *sigev_notify_attributes; /* notification attributes */
> } sigevent_t;
>
> But I don't see an include for the pthread gear in the signal.h header file.
That's right, but that's usually not a problem because the pthread
types are included via sys/types.h. That means, a simple testcase
like
#include <signal.h>
main(){}
isn't sufficient to trigger the above, neither with nor without
-D_XOPEN_SOURCE=600. And there's the fact that emacs is part
of the Cygwin distro, so it seems you're using a non-standard
setting somewhere.
We could add #include sys/_pthreadtypes.h to cygwin/signal.h
unconditioanlly, but it would be interesting to know how the
above include chain works, and why sys/_pthreadtypes.h isn't
picked up.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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