tce-load -i nettle-dev libtasn1-dev p11-kit-dev texinfo

cd gnutls-3.2.21

CC="gcc -flto -fuse-linker-plugin -mtune=generic -Os -pipe" CXX="g++ -flto -fuse-linker-plugin -mtune=generic -Os -pipe" ./configure --prefix=/usr/local --disable-static --localstatedir=/var --with-default-trust-store-file=/usr/local/etc/ssl/certs/ca-certificates.crt --with-unbound-root-key-file=/usr/local/etc/unbound/root.key

find . -name Makefile -type f -exec sed -i 's/-g -O2/ /g' {} \;

make
sudo make install

  version:              3.2.21 shared 58:12:30
  Host/Target system:   x86_64-unknown-linux-gnu
  Build system:         x86_64-unknown-linux-gnu
  Install prefix:       /usr/local
  Compiler:             gcc -flto -fuse-linker-plugin -mtune=generic -Os -pipe
  CFlags:               -g -O2
  Library types:        Shared=yes, Static=no
  Local libopts:        yes
  Local libtasn1:       no
  Use nettle-mini:      no

configure: External hardware support:

  /dev/crypto:          no
  Hardware accel:       x86-64
  PKCS#11 support:      yes
  TPM support:          no

configure: Optional features:
(note that included applications might not compile properly
if features are disabled)

  DTLS-SRTP support:    yes
  ALPN support:         yes
  OCSP support:         yes
  OpenPGP support:      yes
  SRP support:          yes
  PSK support:          yes
  DHE support:          yes
  ECDHE support:        yes
  Anon auth support:    yes
  Heartbeat support:    yes
  Unicode support:      yes
  Non-SuiteB curves:    yes

configure: Optional applications:

  crywrap app:          no

configure: Optional libraries:

  Guile wrappers:       no
  C++ library:          yes
  DANE library:         no
  OpenSSL compat:       yes

configure: System files:

  Trust store pkcs11:   
  Trust store file:     /usr/local/etc/ssl/certs/ca-certificates.crt
  Blacklist file:       
  CRL file:             
  DNSSEC root key file: /usr/local/etc/unbound/root.key

configure: WARNING:
***
*** The DNSSEC root key file in /usr/local/etc/unbound/root.key was not found.
*** This file is needed for the verification of DNSSEC responses.
*** Use the command: unbound-anchor -a "/usr/local/etc/unbound/root.key"
*** to generate or update it.
***