LLVM 13 ports build failures (2021-11-27)

I ran another amd64 bulk build with base clang updated to LLVM 13.
I also put in a tentative fix for security/nss.

Failure logs:
http://build-failures.rhaalovely.net/amd64-clang/2021-11-27/

Some very basic triage below. The single biggest problem is linker
failures of this kind:
ld: error: /usr/local/lib/libintl.so.7.0: undefined reference to pthread_mutexattr_init [--no-allow-shlib-undefined]

The most criticial individual port failure is security/pinentry,
which takes out security/gnupg, which prevents hundreds of ports
from being built.

audio/scmpc libintl.so.7.0: undefined reference
cad/pcb libintl.so.7.0: undefined reference
chinese/c2t address of register variable requested
devel/fnc -Werror,-Wunused-but-set-variable
devel/libdsm -Werror breaks pthread autoconf test
devel/libgtop2 libintl.so.7.0: undefined reference
devel/qbs qbs segfault
editors/vim,gtk3,lua libintl.so.7.0: undefined reference
games/dopewars libintl.so.7.0: undefined reference
games/eduke32 LLVM ERROR: out of memory
games/multimc -Werror,-Wunused-but-set-variable
games/nblood LLVM ERROR: out of memory
graphics/gimp/stable missing dependency glib >= 2.56.2
graphics/vulkan-validation-layers -Werror,-Wdeprecated-copy
inputmethods/fcitx libintl.so.7.0: undefined reference
lang/dmd can't load library 'libc++abi.so.5.0'
lang/gambit killed: build stuck for 60mn
lang/ldc can't load library 'libc++abi.so.5.0'
lang/libv8 mksnapshot segfault
mail/neomutt Unable to find KyotoCabinet
misc/posixtestsuite packaging: *.test does not exist
net/gtk-gnutella Cannot compile against GLib
security/encfs C++: no matching constructor
security/pinentry libintl.so.7.0: undefined reference
sysutils/curlftpfs use of undeclared identifier
x11/awesome libexecinfo.so.3.0: undefined reference
x11/fvwm2 libintl.so.7.0: undefined reference
x11/jwm libintl.so.7.0: undefined reference
x11/mate/panel libintl.so.7.0: undefined reference
x11/parcellite packaging: parcellite.mo does not exist
x11/qt5/qtlocation C++: no member in namespace
x11/qt5/qtwayland C++: instantiation of undefined template

--
Christian "naddy" Weisgerber naddy@mips.inka.de