Build GNU Emacs from source.

build-emacs.sh

#!/usr/bin/env bash

## Author: Abidán Brito
## Adapted by Antony Merle for Arch Linux with KDE 6 and Wayland
## This script builds GNU Emacs 29.1 with support for native elisp compilation,
## tree-sitter, libjansson (C JSON library), Wayland, and mailutils.

# Exit on error and print out commands before executing them.
set -euxo pipefail

# Let's set the number of jobs to something reasonable; keep 2 cores
# free to avoid choking the computer during compilation.
JOBS=$(nproc --ignore=2)

# Clone repo locally and get into it.
git clone --depth 1 --branch emacs-29 git://git.savannah.gnu.org/emacs.git
pushd emacs

# Get essential dependencies.
sudo pacman -S --needed base-devel \
    texinfo \
    gnutls \
    libjpeg-turbo \
    libpng \
    libtiff \
    giflib \
    libxpm \
    ncurses \
    gtk3 \
    tree-sitter \
    imagemagick \
    libwebp \
    jansson \
    gcc \
    libgccjit \
    autoconf \
    mailutils \
    cairo \
    harfbuzz \
    glib2 \
    libxml2 \
    wayland \
    wayland-protocols \
    gtk-layer-shell

# Needed for compiling libgccjit
export CC=/usr/bin/gcc CXX=/usr/bin/g++

# Configure and run.
./autogen.sh \
    && ./configure \
    --with-native-compilation \
    --with-pgtk \
    --with-wayland \
    --with-tree-sitter \
    --with-wide-int \
    --with-json \
    --with-modules \
    --without-dbus \
    --with-gnutls \
    --with-mailutils \
    --without-pop \
    --with-cairo \
    --with-imagemagick \
    CFLAGS="-O2 -pipe -mtune=native -march=native -fomit-frame-pointer"

# Build.
make -j${JOBS} NATIVE_FULL_AOT=1 \
    && sudo make install

# Return to the original path.
popd