Checking GLEW_VERSION_4_0 is superfluous since we check GL_ARB_get_program_binary, and it's a runtime variable anyways.

Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.cpp

@@ -144,10 +144,8 @@ void ProgramShaderCache::SetBothShaders(GLuint PS, GLuint VS)
 
 	glAttachShader(entry.program.glprogid, entry.program.psid);
 
-#ifdef GLEW_VERSION_4_0
 	if (g_ActiveConfig.backend_info.bSupportsGLSLCache)
 		glProgramParameteri(entry.program.glprogid, GL_PROGRAM_BINARY_RETRIEVABLE_HINT, GL_TRUE);
-#endif
 
 	glLinkProgram(entry.program.glprogid);
 
@@ -210,7 +208,6 @@ void ProgramShaderCache::Init(void)
 		glBindBufferRange(GL_UNIFORM_BUFFER, 2, s_ps_vs_ubo, s_vs_data_offset, vs_data_size);
 	}
 
-#ifdef GLEW_VERSION_4_0
 	// Read our shader cache, only if supported
 	if (g_ActiveConfig.backend_info.bSupportsGLSLCache)
 	{
@@ -229,7 +226,6 @@ void ProgramShaderCache::Init(void)
 		ProgramFormat = (GLenum)Formats[0];
 		delete[] Formats;
 	}
-#endif
 }
 
 void ProgramShaderCache::Shutdown(void)

Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.h

@@ -85,25 +85,17 @@ struct PROGRAMSHADER
 	// TODO at first glance looks bad - malloc/no free/pointer not saved in instance...
 	u8 *Data()
 	{
-#ifdef GLEW_VERSION_4_0
 		glGetProgramiv(glprogid, GL_PROGRAM_BINARY_LENGTH, &binaryLength);
 		u8* binary = (u8*)malloc(binaryLength);
 		glGetProgramBinary(glprogid, binaryLength, NULL, &ProgramFormat, binary);
 		return binary;
-#else
-		return NULL;
-#endif
 	}
 
 	GLint Size()
 	{
-#ifdef GLEW_VERSION_4_0
 		if (!binaryLength)
 			glGetProgramiv(glprogid, GL_PROGRAM_BINARY_LENGTH, &binaryLength);
 		return binaryLength;
-#else
-		return 0;
-#endif
 	}
 };
 
@@ -137,7 +129,6 @@ class ProgramShaderCache
 	public:
 		void Read(const PROGRAMUID &key, const u8 *value, u32 value_size)
 		{
-#ifdef GLEW_VERSION_4_0
 			PCacheEntry entry;
 
 			// The two shaders might not even exist anymore
@@ -158,7 +149,6 @@ class ProgramShaderCache
 				glUseProgram(entry.program.glprogid);
 				SetProgramVariables(entry, key);
 			}
-#endif
 		}
 	};