tce-load -i compiletc intltool gegl-dev gtk3-dev iso-codes gexiv2-dev appstream-glib-dev libarchive-dev libgs-dev libmng-dev aalib-dev libmypaint-dev mypaint-brushes poppler-data libwmf-dev gudev-lib-dev gtk3-gir

wget https://download.gimp.org/mirror/pub/gimp/v2.99/gimp-2.99.10.tar.bz2

cd gimp-2.99.10

CC="gcc -flto -mtune=generic -Os -pipe" CXX="g++ -flto -mtune=generic -Os -pipe -std=c++11" ./configure --prefix=/usr/local --localstatedir=/var --disable-static --libexecdir=/usr/local/lib/gimp

[-fno-rtti fails]

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

make [13m 25.77s]
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:  no
  Levin matting engine:      no (missing GEGL operation "gegl:matting-levin")
  Language selection:        yes
  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
  JPEG 2000:                 yes
  JPEG XL:                   no (libjxl not found)
  MNG:                       yes
  OpenEXR:                   yes
  WebP:                      yes
  HEIC:                      import: no - export: no [profile support: no]
  AVIF:                      import: no - export: no
  PDF (export):              yes
  Print:                     yes
  Python 3 plug-ins:         yes
  JavaScript plug-ins:       yes (see warning below)
  Lua plug-ins:              yes
  Vala plug-ins:             yes
  TWAIN (Win32):             no
  WMF:                       yes
  X11 Mouse Cursor:          yes
  XPM:                       yes
  Email:                     needs runtime dependency: xdg-email

Unmaintained Plug-Ins (discouraged except for developers):
  Help Browser:              no (WebKit support disabled)
  Webpage:                   no (WebKit support disabled)

Optional Modules:
  ALSA (MIDI Input):         no (libasound not found or unusable)
  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          no (desktop-file-validate not found)

Documentation:
  libgimp API Reference:     no (gi-docgen missing)
  GObject Introspection:     no