GTK3 won’t build on M1 MacBook because of Python 2.6 dependency

[beowulff]

I’m trying to install gerbv.

One of the huge number of dependencies is gtk. Doing a sudo port install gtk3 results in the following error:

Error: Failed to fetch python26: python26 cannot be built for Apple Silicon

I already have python39 installed. Is there any way to get gtk to use that?

[jmroot (Joshua Root)]

Very little actually depends on python26, and it doesn't seem to be a dependency of gtk3 on x86_64 systems at least. Could you please confirm what specifically is depending on python26, with e.g. port rdeps gtk3 and port echo rdepends:python26?

[beowulff]

port rdeps gtk3 says:

xz

libiconv

gperf

gettext

libtextstyle

ncurses

gettext-runtime gettext-tools-libs

gtk-doc

pkgconfig glib2

libxml2

icu zlib

meson

py39-setuptools

py-bootstrap-modules python39

bzip2 expat libedit libffi

expect

automake

autoconf

m4

tcl

dejagnu

openssl

openssl3

sqlite3 python_select python3_select

ninja

re2c

bison

bison-runtime

pcre

libxslt docbook-xml

xmlcatmgr docbook-xml-4.1.2

unzip docbook-xml-4.2

docbook-xml-4.3 docbook-xml-4.4 docbook-xml-4.5 docbook-xml-5.0

docbook-xsl-nons itstool

gawk py310-libxml2

python310

py39-anytree

py39-six

py39-pytest

py39-setuptools_scm

py39-packaging

py39-parsing py39-pretend

py39-tomli

py39-attrs

py39-hypothesis

py39-sortedcontainers

py39-zopeinterface

py39-zope-event py39-pip

pip_select

py39-iniconfig py39-pluggy

py39-py

py39-toml pytest_select

py39-nose

nosetests_select

py39-lxml py39-pygments

pygments_select

py39-mock

libtool

xattr

atk

gobject-introspection

autoconf-archive cairo

libpixman fontconfig

freetype

brotli

cmake

libcxx curl

libidn2

libunistring

perl5

perl5.28

db48 gdbm

readline

texinfo

help2man

perl5.30 p5.30-locale-gettext

libpsl zstd

lz4

curl-ca-bundle

libarchive

lzo2 libb2

libuv

libpng

ossp-uuid

xrender

xorg-libX11

xorg-xtrans xorg-xorgproto xorg-util-macros xorg-libXdmcp xorg-libXau xorg-libxcb

xorg-xcb-proto xorg-libpthread-stubs

xorg-libXext xorg-xcb-util

py39-mako

py39-beaker py39-markupsafe

py39-markdown

pango

fribidi harfbuzz

graphite2

py39-fonttools

fonttools_select py39-brotli py39-zopfli

py39-wheel

py39-python-install

py39-build

py39-pep517

py39-unicodedata2

Xft2

gdk-pixbuf2

shared-mime-info

xmlto

getopt coreutils

gmp

findutils fop grep gsed libpaper links

libevent

jasper

libjpeg-turbo

tiff

libepoxy

mesa

flex

lzip

gindent py27-libxml2

python27

openssl11 python2_select

xorg-libXdamage

xorg-libXfixes

xorg-libXi xorg-libXmu

xorg-libXt

xorg-libsm

xorg-libice

xorg-libXxf86vm

xorg-libXrandr xorg-libXcursor xorg-libXinerama xorg-libXcomposite at-spi2-atk

at-spi2-core

dbus xorg-libXtst

hicolor-icon-theme

port echo rdepends:python26 says:

gwee libhsplasma PCLauncher PlasmaClient PlasmaShop py-clnum py-psyco py-rpncalc py26-bdist_mpkg py26-clnum py26-gdbm py26-numeric py26-pil py26-pip py26-psyco py26-rpncalc py26-setuptools py26-tkinter sounddecompress sphinx3 zopeedit

[beowulff]

This is what I get when I say sudo port install gtk3

---> Computing dependencies for gtk3

---> Cleaning gtk3

---> Scanning binaries for linking errors

---> Found 70 broken files, matching files to ports

Warning: No port py26-libxml2 found in the index; can't rebuild

Warning: No port ncursesw found in the index; can't rebuild

Warning: No port indent found in the index; can't rebuild

---> Found 12 broken ports, determining rebuild order

You can always run 'port rev-upgrade' again to fix errors.

The following ports will be rebuilt:

python26 @2.6.4+darwin

groff @1.22.2

popt @1.15

xorg-libxkbfile @1.0.6

xorg-libxkbui @1.0.2

p5-locale-gettext @1.05

help2man @1.37.1

p5-xml-parser @2.36

pstoedit @3.45

gperf @3.0.4

p7zip @9.04

rarian @0.8.1

[jmroot (Joshua Root)]

So gtk3 installed successfully, and you already had python26 installed, and rev-upgrade has found that it and several other ports are broken and need to be rebuilt. That's not surprising given that it must have been brought over from another OS version that was able to build it. You need to follow the wiki:Migration instructions.