`smoothstep` declared even when GLSL 1.20 is explicitely requested

[illwieckz]

I got this error:

Compile failed.
ERROR: 0:163: 'smoothstep' : cannot redeclare built-in function (only overloading is allowed)

The GLSL shader explicitely started with this line:

#version 120 

As far as I know, smoothstep isn't part of GLSL 1.20.

Our code declares some functions like smoothstep for GLSL versions not implementing them.

So our code then expects smoothstep to not be declared when explicitely requesting GLSL 1.20.

[illwieckz]

Now, I don't know if that error comes from GL4ES or the underlying GL ES driver (PowerVR).