tce-load -i intltool gcr-dev itstool libsecret-dev gpgme-dev libsoup-dev openssh avahi-dev

cd seahorse-3.16.0

CC="gcc -flto -fuse-linker-plugin -mtune=generic -Os -pipe" CXX="g++ -flto -fuse-linker-plugin -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --localstatedir=/var

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

make
sudo make install

PKCS11 Support:             yes
PGP Support:                yes
  GnuPG Version:            gpg (GnuPG) 2.0.22
  GPGME Version:            1.4.3
SSH Support:                yes
Keyserver Support:          no
  LDAP:                     no
  HKP:                      no
  Key Sharing:              no
Debug:                      default (-g, debug output, testable)
Strict:                     no (non-fatal warnings)
Vala build:                 yes
Coverage:                   no