1.  CC       pulsecore/libpulsecommon_11.1_la-shm.lo
2. In file included from pulsecore/shm.c:48:0:
3. ./pulsecore/memfd-wrappers.h:36:19: error: static declaration of 'memfd_create' follows non-static declaration
4.  static inline int memfd_create(const char *name, unsigned int flags) {
5.                    ^~~~~~~~~~~~
6. In file included from /usr/include/bits/mman-linux.h:115:0,
7.                  from /usr/include/bits/mman.h:45,
8.                  from /usr/include/sys/mman.h:41,
9.                  from pulsecore/shm.c:37:
10. /usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
11.  int memfd_create (const char *__name, unsigned int __flags) __THROW;
12.      ^~~~~~~~~~~~
13. make[3]: *** [Makefile:8008: pulsecore/libpulsecommon_11.1_la-shm.lo] Error 1
14. make[3]: Leaving directory '/usr/src/pulseaudio-11.1/src'
15. make[2]: *** [Makefile:4895: all] Error 2
16. make[2]: Leaving directory '/usr/src/pulseaudio-11.1/src'
17. make[1]: *** [Makefile:808: all-recursive] Error 1
18. make[1]: Leaving directory '/usr/src/pulseaudio-11.1'
19. make: *** [Makefile:623: all] Error 2
20. ++ Mark Compile stop   : "pulseaudio" "11.1" "Sat, 24 Feb 2018 20:38:45 +0000"