This reverts commit
4ec449a6ed1d2cea3bf83d6518b3b352ce5daceb.
I meant to not push this one. Review found that a link error is not
mandated: it should link, but you get undefined rendering if you rely
on a missing stage.
page 42/55 section 2.11 "Vertex Shaders":
"If the program object has no vertex shader, or no program object
is currently in use, the results of vertex shader execution are
undefined."
(and similar for page 160/173 section 3.9 "Fragment Shaders" for FS,
and page 45/58 section 2.11.2 "Program Objects" for program being 0)
It turns out the commit was broken anyway, because it was missing a
"goto done", so linkstatus got smashed back to true later and the
error just showed up as a warning in the infolog.
goto done;
}
- if (max_version >= 140) {
- /* Note that this will change with GL_ARB_separate_shader_objects */
- if (num_vert_shaders == 0) {
- linker_error(prog,
- "GLSL %.02f without GL_ARB_compatibility requires a "
- "vertex shader", max_version / 100.0);
- }
- if (num_frag_shaders == 0) {
- linker_error(prog,
- "GLSL %.02f without GL_ARB_compatibility requires a "
- "fragment shader", max_version / 100.0);
- }
- }
-
prog->Version = max_version;
for (unsigned int i = 0; i < MESA_SHADER_TYPES; i++) {