tce-load -i compiletc libidn2-dev gobject-introspection-dev vala-dev gpgme-dev

wget https://download.gnome.org/sources/gmime/3.2/gmime-3.2.7.tar.xz

cd gmime-3.2.7

CC="gcc -flto -mtune=generic -Os -pipe" CXX="g++ -flto -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --disable-static --localstatedir=/var --enable-vala

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

make [0m 30.89s]
sudo make install

Configuration:

  Source code location:  .
  Install prefix:        /usr/local
  Compiler:              gcc -flto -mtune=generic -Os -pipe

  Documentation:         no

  Profiling enabled:     no
  Coverage enabled:      no

  Large file support:    yes
  Console warnings:      no
  PGP/MIME support:      yes (via GpgME)
  S/MIME support:        yes (via GpgME)
  libidn support:        yes

  GObject introspection: yes
  Vala bindings:         yes