[gentoo-user] "The sound of Silence" by glibc

Hi,

emerge -e @world installs glibc

On my system this kills the build of pulseaudio...which in turn make
my linux PC one of the most quiet ones...sigh:

From the compilation output of pulseaudio:
Wfloat-equal -Wmissing-prototypes -Wredundant-decls -Wmissing-declarations -Wmissing-noreturn -Wshadow -Wendif-labels -Wcast-align -Wstrict-aliasing -Wwrite-strings -Wno-unused-parameter -ffast-math -fno-common -fdiagnostics-show-option -fdiagnostics-color=auto -c -o pulsecore/libpulsecommon_11.0_la-socket-util.lo `test -f 'pulsecore/socket-util.c' || echo '/var/tmp/portage/media-sound/pulseaudio-11.0/work/pulseaudio-11.0/src/'`pulsecore/socket-util.c
In file included from /var/tmp/portage/media-sound/pulseaudio-11.0/work/pulseaudio-11.0/src/pulsecore/shm.c:48:0:
/var/tmp/portage/media-sound/pulseaudio-11.0/work/pulseaudio-11.0/src/pulsecore/memfd-wrappers.h:36:19: error: static declaration of ‘memfd_create’ follows non-static declaration
 static inline int memfd_create(const char *name, unsigned int flags) {
                   ^~~~~~~~~~~~
In file included from /usr/include/bits/mman-linux.h:115:0,
                 from /usr/include/bits/mman.h:45,
                 from /usr/include/sys/mman.h:41,
                 from /var/tmp/portage/media-sound/pulseaudio-11.0/work/pulseaudio-11.0/src/pulsecore/shm.c:37:
/usr/include/bits/mman-shared.h:46:5: note: previous declaration of ‘memfd_create’ was here
 int memfd_create (const char *__name, unsigned int __flags) __THROW;
     ^~~~~~~~~~~~
make[3]: *** [Makefile:7991: pulsecore/libpulsecommon_11.0_la-shm.lo] Error 1
make[3]: *** Waiting for unfinished jobs....
libtool: compile:  x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I/var/tmp/portage/media-sound/pulseaudio-11.0/work/pulseaudio-11.0/src -I.. -I/var/tmp/portage/media-sound/pulseaudio-11.0/work/pulseaudio-11.0/src -I/var/tmp/portage/media-sound/pulseaudio-11.0/work/pulseaudio-11.0/src/modules -I../src/modules -DPA_ALSA_PATHS


-rw-r--r-- 1 root root 1872 2017-12-05 17:30 mman.h
-rw-r--r-- 1 root root 4802 2017-12-05 17:30 mman-linux.h
-rw-r--r-- 1 root root 2730 2017-12-05 17:30 mman-shared.h

include/bits>qfile /usr/include/bits/mman.h
sys-libs/glibc (/usr/include/bits/mman.h)


How can I get out of this...

Cheers
Meino