build.sh gives error about ded HOT 4 CLOSED

If you un-inline the pkg-config call, then the script will stop there on error (due to the set -e), which at least saves you the unnecessary errors from the compiler:

PKGFLAGS=`pkg-config --cflags $PKGS`                                                                                                                                 

$CC $CFLAGS $PKGFLAGS -o ded $SRC $LIBS `pkg-config --libs $PKGS`

This is better because the in-line version will be empty if ANY of the packages are missing, potentially resulting in misleading errors from the compiler, e.g complaining about SDL2 includes missing even though they're correctly installed.

It's a minor thing obviously as the project wouldn't build anyway. Something to beware of if you copy this approach.

from ded.

sudo apt-get install libsdl2-dev
sudo apt-get install libglew-dev

To be complete:

sudo apt install libsdl2-dev libglew-dev libfreetype-dev

If you get an error like "Package 'opengl', required by 'glu', not found", install libopengl-dev manually.

This is because the package dependencies for libglu1-mesa-dev were missing libopengl-dev, which provides opengl.pc on debian/ubuntu/linux mint. This was an issue on my Linux Mint 21.1 installation.

from ded.

It is not error. It is invitation to perform maintenance on a copy of Linux using script messages as assistance.

from ded.

sudo apt-get install libsdl2-dev
sudo apt-get install libglew-dev

from ded.