Arch Linux

Using the latest Arch, it is not possible to build this Gimp26
here is workaround.
Install babl-legacy
Install gegl18
Fix PKGBUILD, it needs to be like this(fixed one dependency and one #include with sed):



# $Id: PKGBUILD 148733 2012-02-05 11:48:34Z ibiru $
# Maintainer: tobias <tobias@archlinux.org>

pkgname=gimp26
pkgver=2.6.12
pkgrel=2
pkgdesc="GNU Image Manipulation Program"
arch=('i686' 'x86_64')
url="http://www.gimp.org/"
license=('GPL' 'LGPL')
depends=('pygtk' 'lcms' 'libxpm' 'libwmf' 'libxmu' 'librsvg' 'libmng' 'dbus-glib' \
'libexif' 'gegl18' 'desktop-file-utils' 'hicolor-icon-theme')
makedepends=('intltool' 'libwebkit' 'poppler-glib' 'alsa-lib' 'iso-codes' 'curl')
optdepends=('gutenprint: for sophisticated printing only as gimp has built-in cups print support'
'libwebkit: for the help browser'
'poppler-glib: for pdf support'
'alsa-lib: for MIDI event controller module'
'curl: for URI support')
options=('!libtool' '!makeflags')
conflicts=('gimp-devel')
install=gimp.install
source=(ftp://ftp.gimp.org/pub/gimp/v${pkgver%.*}/${pkgname//26}-${pkgver}.tar.bz2 linux.gpl
uri-backend-libcurl.patch)
sha1sums=('82964e3d4eb003239f3443a1bccac53f5d780e15'
'110ce9798173b19a662d086ed7b882b4729f06cf'
'a65b0ee6cd1b4345065b7b98c07f2fed15f844f4')

build() {
cd "${srcdir}/${pkgname//26}-${pkgver}"
patch -p1 < ../uri-backend-libcurl.patch
sed -i 's|<freetype/tttables.h>|FT_TRUETYPE_TABLES_H|' "./app/text/gimpfont.c"
PYTHON=python2 PYTHON_VERSION=2.7 ./configure --prefix=/usr --sysconfdir=/etc \
--enable-mp --enable-gimp-console --enable-gimp-remote \
--enable-python --with-gif-compression=lzw --with-libcurl \
--without-aa --without-hal --without-gvfs --without-gnomevfs
make
}

package() {
cd "${srcdir}/${pkgname//26}-${pkgver}"
make DESTDIR="${pkgdir}" install
sed -i 's|#!/usr/bin/env python|#!/usr/bin/env python2|' "${pkgdir}"/usr/lib/gimp/2.0/plug-ins/*.py
install -D -m644 "${srcdir}/linux.gpl" "${pkgdir}/usr/share/gimp/2.0/palettes/Linux.gpl"

rm "${pkgdir}/usr/share/man/man1/gimp-console.1"
ln -s gimp-console-${pkgver%.*}.1.gz "${pkgdir}/usr/share/man/man1/gimp-console.1.gz"
ln -s gimptool-2.0 "${pkgdir}/usr/bin/gimptool"
ln -sf gimptool-2.0.1.gz "${pkgdir}/usr/share/man/man1/gimptool.1.gz"
}

NOTE: building and installation requires gegl-0.1.8 due to API/ABI changes in gegl-0.2.

For those that prefer gimp 2.6 to the current 2.8.