GPUShader: compile error:
===== shader string 1 ====
 1  #version 330
===== shader string 2 ====
 2  #define GPU_FRAGMENT_SHADER
===== shader string 3 ====
 3  #extension GL_ARB_texture_gather: enable
 4  #define GPU_ARB_texture_gather
 5  #extension GL_ARB_texture_query_lod: enable
 6  #extension GL_ARB_texture_cube_map_array : enable
 7  #define GPU_ARB_texture_cube_map_array
===== shader string 4 ====
 8  #define GPU_INTEL
 9  #define OS_MAC
10  #define DFDX_SIGN 1.0
11  #define DFDY_SIGN 1.0
===== shader string 5 ====
12  #define HAIR_PHASE_SUBDIV
13  #define TF_WORKAROUND
===== shader string 6 ====
14
15  in vec4 finalColor;
16  out vec4 fragColor;
17
18  void main()
19  {
20    fragColor = finalColor;
21    fragColor = blender_srgb_to_framebuffer_space(fragColor);
22  }
ERROR: 0:21: Invalid call of undeclared identifier 'blender_srgb_to_framebuffer_space'

diff --git a/source/blender/gpu/shaders/gpu_shader_3D_smooth_color_frag.glsl b/source/blender/gpu/shaders/gpu_shader_3D_smooth_color_frag.glsl
index 3a2d96c9929..51fadfb1e70 100644
--- a/source/blender/gpu/shaders/gpu_shader_3D_smooth_color_frag.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_3D_smooth_color_frag.glsl
@@ -5,5 +5,7 @@ out vec4 fragColor;
 void main()
 {
   fragColor = finalColor;
+#ifdef blender_srgb_to_framebuffer_space
   fragColor = blender_srgb_to_framebuffer_space(fragColor);
+#endif
 }