Building GRUB2

Requirements

ubuntu

apt install build-essential
...?

slackware

slackpkg search fuse
slackpkg search freetype
slackpkg search libpng
slackpkg search harfbuzz
slackpkg search glib2

Build & deploy

grab the latest

ver=2.12

wget https://ftp.gnu.org/gnu/grub/grub-$ver.tar.gz
tar xzf grub-$ver.tar.gz
cd grub-$ver/
./configure --sysconfdir=/etc --localstatedir=/var --disable-nls
echo $MAKEFLAGS
make > make.log && echo BUILT
make install