vanessa@rainbird:~$ glxinfo|grep -i shad
OpenGL core profile shading language version string: 4.30
    GL_AMDX_debug_output, GL_AMDX_vertex_shader_tessellator,
    GL_AMD_seamless_cubemap_per_texture, GL_AMD_shader_stencil_export,
    GL_AMD_shader_trace, GL_AMD_texture_cube_map_array,
    GL_AMD_vertex_shader_layer, GL_AMD_vertex_shader_tessellator,
    GL_AMD_vertex_shader_viewport_index, GL_ARB_ES2_compatibility,
    GL_ARB_compute_shader, GL_ARB_conservative_depth, GL_ARB_copy_buffer,
    GL_ARB_fragment_program, GL_ARB_fragment_program_shadow,
    GL_ARB_fragment_shader, GL_ARB_framebuffer_no_attachments,
    GL_ARB_geometry_shader4, GL_ARB_get_program_binary, GL_ARB_gpu_shader5,
    GL_ARB_gpu_shader_fp64, GL_ARB_half_float_pixel, GL_ARB_half_float_vertex,
    GL_ARB_query_buffer_object, GL_ARB_sample_shading, GL_ARB_sampler_objects,
    GL_ARB_separate_shader_objects, GL_ARB_shader_atomic_counters,
    GL_ARB_shader_bit_encoding, GL_ARB_shader_image_load_store,
    GL_ARB_shader_image_size, GL_ARB_shader_objects, GL_ARB_shader_precision,
    GL_ARB_shader_stencil_export, GL_ARB_shader_storage_buffer_object,
    GL_ARB_shader_subroutine, GL_ARB_shader_texture_lod,
    GL_ARB_shading_language_100, GL_ARB_shading_language_420pack,
    GL_ARB_shading_language_packing, GL_ARB_shadow, GL_ARB_shadow_ambient,
    GL_ARB_stencil_texturing, GL_ARB_sync, GL_ARB_tessellation_shader,
    GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_ARB_vertex_shader,
    GL_ATI_envmap_bumpmap, GL_ATI_fragment_shader, GL_ATI_meminfo,
    GL_EXT_geometry_shader4, GL_EXT_gpu_program_parameters,
    GL_EXT_gpu_shader4, GL_EXT_histogram, GL_EXT_multi_draw_arrays,
    GL_EXT_separate_specular_color, GL_EXT_shader_image_load_store,
    GL_EXT_shadow_funcs, GL_EXT_stencil_wrap, GL_EXT_subtexture,
OpenGL shading language version string: 4.30
    GL_AMDX_debug_output, GL_AMDX_vertex_shader_tessellator,
    GL_AMD_seamless_cubemap_per_texture, GL_AMD_shader_stencil_export,
    GL_AMD_shader_trace, GL_AMD_texture_cube_map_array,
    GL_AMD_vertex_shader_layer, GL_AMD_vertex_shader_tessellator,
    GL_AMD_vertex_shader_viewport_index, GL_ARB_ES2_compatibility,
    GL_ARB_compressed_texture_pixel_storage, GL_ARB_compute_shader,
    GL_ARB_fragment_program_shadow, GL_ARB_fragment_shader,
    GL_ARB_framebuffer_sRGB, GL_ARB_geometry_shader4,
    GL_ARB_get_program_binary, GL_ARB_gpu_shader5, GL_ARB_gpu_shader_fp64,
    GL_ARB_query_buffer_object, GL_ARB_sample_shading, GL_ARB_sampler_objects,
    GL_ARB_separate_shader_objects, GL_ARB_shader_atomic_counters,
    GL_ARB_shader_bit_encoding, GL_ARB_shader_image_load_store,
    GL_ARB_shader_image_size, GL_ARB_shader_objects, GL_ARB_shader_precision,
    GL_ARB_shader_stencil_export, GL_ARB_shader_storage_buffer_object,
    GL_ARB_shader_subroutine, GL_ARB_shader_texture_lod,
    GL_ARB_shading_language_100, GL_ARB_shading_language_420pack,
    GL_ARB_shading_language_packing, GL_ARB_shadow, GL_ARB_shadow_ambient,
    GL_ARB_stencil_texturing, GL_ARB_sync, GL_ARB_tessellation_shader,
    GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_ARB_vertex_shader,
    GL_ATI_envmap_bumpmap, GL_ATI_fragment_shader, GL_ATI_meminfo,
    GL_EXT_geometry_shader4, GL_EXT_gpu_program_parameters,
    GL_EXT_gpu_shader4, GL_EXT_histogram, GL_EXT_multi_draw_arrays,
    GL_EXT_separate_specular_color, GL_EXT_shader_image_load_store,
    GL_EXT_shadow_funcs, GL_EXT_stencil_wrap, GL_EXT_subtexture,