tce-load -i compiletc intltool gegl-dev gtk2-dev libmypaint-dev mypaint-brushes poppler-data libwmf-dev alsa-dev gudev-lib-dev glib-networking pygtk-dev aalib-dev libmng-dev appstream-glib desktop-file-utils libgs-dev libheif-dev

https://download.gimp.org/mirror/pub/gimp/v2.10/gimp-2.10.18.tar.bz2

cd gimp-2.10.18

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 -libexecdir=/usr/local/lib/gimp

[-fno-exceptions -fno-rtti fails]

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

make [11m 32.00s]
sudo make install

Building GIMP with prefix=/usr/local, datarootdir=${prefix}/share
Desktop files install into ${datarootdir}

Extra Binaries:
  gimp-console:              yes

Optional Features:
  Check updates at startup:  yes
  Levin matting engine:      no (missing GEGL operation "gegl:matting-levin")
  Language selection:        no (iso-codes package not found)
  Vector icons:              yes
  Dr. Mingw (Win32):         no
  Relocatable bundle:        no
  Default ICC directory:     /usr/share/color/icc
  Debug console (Win32):     no
  32-bit DLL folder (Win32): no
  Detailed backtraces:       no (libbacktrace and libunwind are not found or not supported)

Optional Plug-Ins:
  Ascii Art:                 yes
  Ghostscript:               yes
  Help Browser:              no (WebKit not found)
  JPEG 2000:                 yes
  MNG:                       yes
  OpenEXR:                   yes
  WebP:                      yes
  Heif:                      yes [profile support: yes]
  PDF (export):              yes
  Print:                     yes
  Python 2:                  yes
  TWAIN (Win32):             no
  Webpage:                   no (WebKit not found)
  WMF:                       yes
  X11 Mouse Cursor:          yes
  XPM:                       yes
  Email:                     needs runtime dependency: xdg-email

Optional Modules:
  ALSA (MIDI Input):         yes
  Linux Input:               yes (GUdev support: yes)
  DirectInput (Win32):       no

Tests:
  Use xvfb-run               no (not found)
  Test appdata               yes (this test requires network access; --without-appdata-test to disable)
  Test desktop file          yes

Bug report URL: https://gitlab.gnome.org/GNOME/gimp/issues/new

NOTE: if you plan on packaging GIMP for distribution, it is recommended
      to override the bug report URL with option:
        --with-bug-report-url=https://example.com/
      so that you can filter packaging bugs from core bugs before
      reporting upstream.

WARNING: libmypaint lower than version 1.4.0 is known to crash when
         parsing MyPaint 2 brushes. Please update.