tce-load -i compiletc meson gegl-dev gtk3-dev gobject-introspection-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 libheif-dev desktop-file-utils vala-dev appstream-glib gegl-gir

wget https://download.gimp.org/mirror/pub/gimp/v2.99/gimp-2.99.18.tar.xz

cd gimp-2.99.18

sudo cp /tmp/tcloop/gcc_libs-dev/usr/local/lib/libgomp.spec /usr/lib

mkdir build-gimp
cd build-gimp

CC="gcc -flto -mtune=generic -Os -pipe" CXX="g++ -flto -mtune=generic -Os -pipe" meson --prefix=/usr/local --localstatedir=/var --buildtype=plain --libexecdir=/usr/local/lib/gimp -Dicc-directory=/usr/local/share/color/icc

[-fno-rtti fails]

ninja [15m 13.52s]
sudo ninja install

Configuring gimp-2.99.1 using configuration
Message: Extra Binaries:
  gimp-console:        true

Optional Features:
  Check updates at startup:  false
  Language selection:        true
  Vector icons:              true
  Dr. Mingw (Win32):         false
  Relocatable Bundle:        false
  Default ICC directory:     /usr/share/color/icc
  32-bit DLL folder (Win32): 32/bin
  Detailed backtraces:       false
  Binary symlinks:           false
  OpenMP:                    true

Optional Plug-Ins:
  Ascii Art:           true
  Ghostscript:         true
  JPEG 2000:           true
  JPEG XL:             false
  MNG:                 true
  OpenEXR:             true
  WebP:                true
  HEIC:                import: false - export: true
  AVIF:                import: true - export: true
  PDF (export):        true
  Print:               true
  Python 3 plug-ins:   false
  Javascript plug-ins: false
  Lua plug-ins:        false
  Vala plug-ins:       true
  TWAIN (Win32):       false
  WMF:                 false
  X11 Mouse Cursor:    true
  XPM:                 true
  Quite-OK Image:      false
  Amiga IFF/ILBM:      false
  Email:               true (xdg-email)
  FITS:                false

Unmaintained Plug-Ins (discouraged except for developers):
  Help Browser:        false
  Webpage:             false

Optional Modules:
  ALSA (MIDI Input):   true
  Linux Input:         true (GUdev support: true)
  DirectInput (Win32): false

Tests:
  Use xvfb-run         false
  Test appdata         false

Documentation:
  libgimp API Reference: false
  GObject Introspection: false

Bug report URL: https://gitlab.gnome.org/GNOME/gimp/issues/new
../meson.build:2008: WARNING: Warnings occurred during configuration
../meson.build:2010: WARNING: Xdg-email not found, but required at runtime for email sending.
Build targets in project: 855

gimp 2.99.18

  User defined options
    buildtype    : plain
    libexecdir   : /usr/local/lib/gimp
    localstatedir: /var
    prefix       : /usr/local