The script assumes glad got cloned into glad subdirectory. This is the
case if you follow the procedure outlined in the README, however if you
are using system glad or or glad installed via pip this assumption
doesn't hold.
Therefore relax the requirement on where to get glad from. While at it
add shell option errexit and make the script callable from repository root.
Signed-off-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>
- Silence a MSVC warning in vulkan.cpp, refs #6987
- Document the patching of gl.h for macOS, from r26094
- Fix shellcheck warnings in the generation script
