Compiled on PI4B4G with 5.10.77-piCore-v8

Compile Flags:
CPPFLAGS='-DNDEBUG'
CFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto'
CXXFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto'
LDFLAGS="-Wl,-O1"
export CPPFLAGS CFLAGS CXXFLAGS LDFLAGS

Distcc: (don't use distcc, not helping at all, it'll slow things down)
distcc[337] (dcc_please_send_email_after_investigation) Warning: remote compilation of 'ibuscomponent.c' failed, retried locally and got a different result.

Dependencies: (automake required even if you use configure)
automake
bash
compiletc
coreutils
python3.8-dev
gtk3-dev
dconf-dev
gettext-dev
gnome-common
gtk-doc
gtk2-dev
gtk2-gir
gtk3-gir
iso-codes
gtk4-dev
gtk4-gir
pigz
py3-pygments
tar
unicode-character-database
unicode-cldr-emoji-annotations
unicode-emoji
vala-dev

Commands:

# Adjusting system
# fix LTO
P=/usr/local/libexec/gcc/aarch64-unknown-linux-gnu/10.2.0/liblto_plugin.so.0.0.0
sudo mkdir -p /usr/local/lib/bfd-plugins
sudo ln -sfv $P /usr/local/lib/bfd-plugins/liblto_plugin.so

# insignificant, caused by wrong permission of tce.installed in docbook-xsl.tcz
touch /usr/local/tce.installed/libxml2-python /usr/local/tce.installed/itstool

# This file needs to be linked (aarch64 only)
# simply changing the other .la files won't help
# this is my test script --> ./adjust-la-aarch64.sh
sudo ln -sfv /usr/lib/libuuid.la /lib/libuuid.la

# Source code, pi4 has enough memory
cd /tmp

wget --no-check-certificate https://github.com/ibus/ibus/releases/download/1.5.26/ibus-1.5.26.tar.gz

time tar -I pigz -xf ibus-1.5.26.tar.gz -C /tmp/
real    0m 0.19s
user    0m 0.21s
sys     0m 0.15s

# required.patch
## deprecated-schema.patch gtk-query-immodules.patch python-shebang.patch
cat deprecated-schema.patch gtk-query-immodules.patch python-shebang.patch > /tmp/required.patch
cd /tmp/ibus-1.5.26/ && patch -Np1 -i /tmp/required.patch

# Compiling
# variables
CPPFLAGS='-DNDEBUG'
CFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto'
CXXFLAGS='-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto'
LDFLAGS="-Wl,-O1"
export CPPFLAGS CFLAGS CXXFLAGS LDFLAGS

# use ./configure instead of ./autogen.sh
# --disable-gtk-doc
# already there
# disable to save time
# --disable-systemd-services
# disable systemd
# --libexecdir=/usr/local/libexec
# On aarch64, we're using the default value
./configure --prefix=/usr/local \
--sysconfdir=/usr/local/etc \
--libdir=/usr/local/lib \
--libexecdir=/usr/local/lib/ibus \
--datarootdir=/usr/local/share \
--enable-vala=yes \
--enable-python-library \
--enable-wayland \
--enable-static \
--enable-shared \
--enable-gtk4 \
--disable-gtk-doc \
--disable-systemd-services \
--with-python=/usr/local/bin/python3 \
--with-unicode-emoji-dir=/usr/local/share/unicode/emoji \
--with-emoji-annotation-dir=/usr/local/share/unicode/cldr/common/annotations \
--with-ucd-dir=/usr/local/share/unicode/ucd
# on pi4 --> a few seconds; on pi3 --> 3 min
real    0m 13.61s
user    0m 10.31s
sys     0m 5.81s

# Some of the libtool variablesis empty, the cause is unclear
# If you compile with lto, this has to be done after configuration
# This phenomenon only happens in aarch64
[ "$CFLAGS" = "${CFLAGS/-flto/}" ] || patch -Np1 -i ../libtool-lto-aarch64.patch

# make
time make -j5 V=1
real    14m 16.36s
user    51m 14.17s
sys     1m 13.88s

## optional check
# some tests require GUI or certain locales
make -k check

# install (or install-strip, remember to set STRIP=llvm-strip)
DESTDIR=/tmp/packing-ibus make install

# Note: python2 and python3 are identical without bytecodes
# diff -qrs /tmp/2/usr/local/lib/python2.7/ /tmp/3/usr/local/lib/python3.8/

Packing:

cd /tmp/packing-ibus/
find . -type f -exec file {} ';' > /tmp/file.info

# strip
grep ELF /tmp/file.info | cut -d : -f 1 | xargs strip --strip-unneeded
grep 'current ar archive' /tmp/file.info | cut -d : -f 1 | xargs llvm-strip --strip-debug

# remove bytecodes (.pyc)
# it looks like they've dropped .pyo files
find -name '*.pyc' -exec rm {} ';'

# dicts
mkdir -p /tmp/packing-ibus-dicts/usr/local/share/ibus/
mv ./usr/local/share/ibus/dicts/ /tmp/packing-ibus-dicts/usr/local/share/ibus/

# immodules, keep the default gtk3 in ibus.tcz
# It's unclear how to install GTK4 module cause things has change a lot
# https://bugs.gentoo.org/830109
# The manual isn't helping
# https://github.com/ibus/ibus/wiki/Install
# gtk-query-immodules-2.0 --update-cache
# gtk-query-immodules-3.0 --update-cache
mkdir -p /tmp/packing-ibus-gtk2/usr/local/lib/gtk-2.0/2.10.0/immodules
mkdir -p /tmp/packing-ibus-gtk4/usr/local/lib/gtk-4.0/4.0.0/immodules
mv ./usr/local/lib/gtk-2.0/2.10.0/immodules/im-ibus.so \
  /tmp/packing-ibus-gtk2/usr/local/lib/gtk-2.0/2.10.0/immodules
mv ./usr/local/lib/gtk-4.0/4.0.0/immodules/libim-ibus.so \
  /tmp/packing-ibus-gtk4/usr/local/lib/gtk-4.0/4.0.0/immodules

# gir
mkdir -p /tmp/packing-ibus-gir/usr/local/lib
mkdir -p /tmp/packing-ibus-gir/usr/local/share
mv ./usr/local/lib/girepository-1.0/ /tmp/packing-ibus-gir/usr/local/lib/
mv ./usr/local/share/gir-1.0/ /tmp/packing-ibus-gir/usr/local/share/

# doc
mkdir -p /tmp/packing-ibus-doc/usr/local/share
mv ./usr/local/share/gtk-doc/ /tmp/packing-ibus-doc/usr/local/share/
mv ./usr/local/share/man/ /tmp/packing-ibus-doc/usr/local/share/

# locale
mkdir -p /tmp/packing-ibus-locale/usr/local/share
mv ./usr/local/share/locale/ /tmp/packing-ibus-locale/usr/local/share/

# wayland (new file etc/xdg/Xwayland-session.d/10-ibus-x11)
mkdir -p /tmp/packing-ibus-wayland/usr/local/lib/ibus
mv ./usr/local/lib/ibus/ibus-wayland /tmp/packing-ibus-wayland/usr/local/lib/ibus/
mkdir -p /tmp/packing-ibus-wayland/usr/local/etc/xdg/Xwayland-session.d
mv ./usr/local/etc/xdg/Xwayland-session.d/10-ibus-x11 \
  /tmp/packing-ibus-wayland/usr/local/etc/xdg/Xwayland-session.d/

# dev
mkdir -p /tmp/packing-ibus-dev/usr/local/lib
mv ./usr/local/lib/gtk-* /tmp/packing-ibus-dev/usr/local/lib/
mkdir -p ./usr/local/lib/gtk-3.0/3.0.0/immodules
mv /tmp/packing-ibus-dev/usr/local/lib/gtk-3.0/3.0.0/immodules/im-ibus.so \
  ./usr/local/lib/gtk-3.0/3.0.0/immodules
mv ./usr/local/include /tmp/packing-ibus-dev/usr/local/
mv ./usr/local/lib/pkgconfig /tmp/packing-ibus-dev/usr/local/lib/
mkdir -p /tmp/packing-ibus-dev/usr/local/share
mv ./usr/local/share/vala /tmp/packing-ibus-dev/usr/local/share/
mv ./usr/local/lib/*a /tmp/packing-ibus-dev/usr/local/lib/

# Main
# remove empty directory
find -depth -exec rmdir {} ';' 2> /dev/null

Adjustment for TC:
# the fake links are no longer required with gtk-query-immodules.patch
# gtk-query-immodules-3.0-32 / gtk-query-immodules-3.0-64

ibus.tcz:
- etc/profile.d/ibus.sh
 -> environment variables
- usr/local/tce.installed/ibus
 -> commands and file copy
- 
 -> a symbolic link to /usr/local/bin/gtk-query-immodules-3.0

ibus-gtk2.tcz:
- usr/local/tce.installed/ibus-gtk2
 -> refresh cache

Packing up:
ls -1d packing-ibus*
packing-ibus/
packing-ibus-dev/
packing-ibus-dicts/
packing-ibus-doc/
packing-ibus-gir/
packing-ibus-gtk2/
packing-ibus-gtk4/
packing-ibus-locale/
packing-ibus-wayland/

sudo chown -R 0.0 packing-ibus*
sudo chown root:staff packing-ibus*/usr/local/tce.installed/
sudo chown tc:staff packing-ibus*/usr/local/tce.installed/*

mkdir ibus-aarch64
for D in packing-ibus*; do mksquashfs $D ./ibus-aarch64/${D/packing-/}.tcz -quiet; done

==========================================================================================

Build options:
  Version                       1.5.26
  Install prefix                /usr/local
  Build shared libs             yes
  Build static libs             yes
  CFLAGS                        -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -flto
  PYTHON                        /usr/local/bin/python3
  PYTHON2                       /usr/local/bin/python3
  Enable python2                yes
  Gtk2 immodule dir             /usr/local/lib/gtk-2.0/2.10.0/immodules
  Gtk3 immodule dir             /usr/local/lib/gtk-3.0/3.0.0/immodules
  Gtk4 immodule dir             /usr/local/lib/gtk-4.0/4.0.0/immodules
  Build gtk2 immodule           yes
  Build gtk3 immodule           yes
  Build gtk4 immodule           yes
  Build XIM agent server        yes
  Build wayland support         yes
  Build gdk3 wayland support    yes
  Build appindicator support    yes (enabled, use --disable-appindicator to disable)
  Build python library          yes
  Build memconf modules         no
  Build dconf modules           yes (enabled, use --disable-dconf to disable)
  Build introspection           yes
  IBus-1.0.gir scannerflags     "--warn-all --identifier-prefix=IBus --symbol-prefix=ibus --c-include=ibus.h"
  Build vala binding            yes
  Build document                no (disabled, use --enable-gtk-doc to enable)
  Build UI                      yes (enabled, use --disable-ui to disable)
  Build engine                  yes (enabled, use --disable-engine to disable)
  Enable key snooper            yes
  No snooper regexes            "firefox.*,.*chrome.*,.*chromium.*,terminator"
  Panel icon                    "ibus-keyboard"
  Enable surrounding-text       yes
  Enable Emoji dict             yes (enabled, use --disable-emoji-dict to disable)
  Unicode Emoji directory       /usr/local/share/unicode/emoji
  CLDR annotation directory     /usr/local/share/unicode/cldr/common/annotations
  Enable Unicode dict           yes (enabled, use --disable-unicode-dict to disable)
  UCD directory                 /usr/local/share/unicode/ucd
  Socket directory              "unix:tmpdir=$XDG_CACHE_HOME/ibus"
  XFixes client disconnect      no (libXfixes version is lower than 6)
  Install systemd service       no
  Run test cases                yes
  Install tests                 no (disabled, use --enable-install-tests to enable)