So this was a conversation.
tl;dr You can't just FUCKING RECOMPILE for an older OpenGL version you dimwit!

Context: Person Y has OpenGL 3.1, my program requires OpenGL 2.1, but refused to launch with "Pixel format not accelerated"

--------

Person X - Today at 9:28 PM
Nope
or optionally compile it for old opengl
Or just use my old junk.

Me - Today at 9:29 PM
No

Person X - Today at 9:29 PM
Why?

Me - Today at 9:29 PM
You don't just "compile it for old opengl"

Person X - Today at 9:29 PM
I can
Btw

Me - Today at 9:29 PM
For one, Person Y has an OGL version new enough so... /shrug

Person X - Today at 9:29 PM
shrug

Me - Today at 9:30 PM
And there is no way I'm ripping the rendering code apart and re-doing everything with glBegin, glVertex, glEnd guff

Person X - Today at 9:30 PM
You don't have to

Me - Today at 9:30 PM
You do

Person X - Today at 9:30 PM
Just use a vbo
Than a vba

Me - Today at 9:30 PM
I ALREADY USE FUCKING VBOS

Person X - Today at 9:30 PM
....
There's two typws
Types
Btw one with indacys and one with out
Ones 3.0 ones 4.0

Me - Today at 9:31 PM
tl;dr. I am not rewriting half of everything for worse performance just for the sake of being compatible with even more legacy OGL, that might not even work anyway for Person Y. idc

Person X - Today at 9:32 PM
Plus if your using glut you can set the version I want to say
Also it's not worse

<Some more conversation>

Person X - Today at 9:33 PM
Btw crafted [Me] taking th lazy way as normal
Btwx500

Me - Today at 9:33 PM
Taking the lazy way eh.
You have no idea do you

Person X - Today at 9:33 PM
Yes you are
I have more of one :p
Than you think