Commit aa7a196c authored by Shu's avatar Shu 🍠
Browse files

Update inludes

parent c1df78bf
.vscode
build
docs
include
external
content/**/.*
\ No newline at end of file
resource/*/.*
\ No newline at end of file
[submodule "include/tracy"]
path = include/tracy
url = https://github.com/wolfpld/tracy.git
cmake_minimum_required(VERSION 3.11)
project (univerxel VERSION 0.0.1)
cmake_policy(SET CMP0072 NEW)
find_package(OpenGL REQUIRED)
find_package(glm REQUIRED)
option(PROFILING "Build with profiling" 0)
option(FIXED_WINDOW "Lock window size: Force floating on i3" 0)
set(SIMD_LEVEL "avx2" CACHE STRING "SIMD processor acceleration (avx2, avx512f, ...)")
if(NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE Release)
......@@ -20,35 +17,32 @@ if(CCACHE_FOUND)
set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
endif(CCACHE_FOUND)
set(LINKED_LIBS
${OPENGL_LIBRARY}
glfw
GLEW
pthread
dl
zstd
)
add_definitions(
-DTW_STATIC
-DTW_NO_LIB_PRAGMA
-DTW_NO_DIRECT3D
-DGLEW_STATIC
-D_CRT_SECURE_NO_WARNINGS
-mavx2 #-mavx512f
-m${SIMD_LEVEL}
-mfma
)
add_subdirectory("include/glm")
set(LINKED_LIBS glfw pthread dl glm::glm_static)
file(GLOB_RECURSE SOURCES "src/*/*.cpp")
file(GLOB INCLUDE_SOURCES "include/imgui-1.76/*.cpp" "include/FastNoiseSIMD/*.cpp" "include/tracy/TracyClient.cpp" "include/meshoptimizer/*.cpp")
file(GLOB INCLUDE_SOURCES
"include/imgui/*.cpp"
"include/FastNoiseSIMD/*.cpp"
"include/tracy/TracyClient.cpp"
"include/meshoptimizer/*.cpp"
"include/zstd/*/*.c"
"include/gl3w/gl3w.c"
)
set(INCLUDE_LIBS
"include/imgui-1.76"
"include/imgui"
"include/FastNoiseSIMD"
"include/toml++"
"include/robin_hood"
"include/libguarded"
"include/tracy"
"include/meshoptimizer"
"include/zstd"
"include/gl3w"
)
add_executable(univerxel "src/main.cpp" ${SOURCES} ${INCLUDE_SOURCES})
......
......@@ -8,6 +8,7 @@ Work in progress galaxy down to atom (mostly centimeter) voxel game
- [Built With](#built-with)
- [Getting Started](#getting-started)
- [Prerequisites](#prerequisites)
- [Build](#build)
- [Optionally](#optionally)
- [Installation](#installation)
- [Usage](#usage)
......@@ -29,7 +30,6 @@ Experimental project using OpenGL and Vulkan.
* Vulkan
* ImGui
* FasNoiseSIMD
* Toml++
* Love and insomnia
......@@ -43,14 +43,11 @@ To get a local copy up and running, follow these simple steps.
* OpenGL or Vulkan driver
* GLFw3
* Zstd
#### Build
* C++17
* CMake 3.11
* GLEW
* GLM
#### Optionally
......
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#ifndef __khrplatform_h_
#define __khrplatform_h_
/*
** Copyright (c) 2008-2018 The Khronos Group Inc.
**
** Permission is hereby granted, free of charge, to any person obtaining a
** copy of this software and/or associated documentation files (the
** "Materials"), to deal in the Materials without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Materials, and to
** permit persons to whom the Materials are furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be included
** in all copies or substantial portions of the Materials.
**
** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
*/
/* Khronos platform-specific types and definitions.
*
* The master copy of khrplatform.h is maintained in the Khronos EGL
* Registry repository at https://github.com/KhronosGroup/EGL-Registry
* The last semantic modification to khrplatform.h was at commit ID:
* 67a3e0864c2d75ea5287b9f3d2eb74a745936692
*
* Adopters may modify this file to suit their platform. Adopters are
* encouraged to submit platform specific modifications to the Khronos
* group so that they can be included in future versions of this file.
* Please submit changes by filing pull requests or issues on
* the EGL Registry repository linked above.
*
*
* See the Implementer's Guidelines for information about where this file
* should be located on your system and for more details of its use:
* http://www.khronos.org/registry/implementers_guide.pdf
*
* This file should be included as
* #include <KHR/khrplatform.h>
* by Khronos client API header files that use its types and defines.
*
* The types in khrplatform.h should only be used to define API-specific types.
*
* Types defined in khrplatform.h:
* khronos_int8_t signed 8 bit
* khronos_uint8_t unsigned 8 bit
* khronos_int16_t signed 16 bit
* khronos_uint16_t unsigned 16 bit
* khronos_int32_t signed 32 bit
* khronos_uint32_t unsigned 32 bit
* khronos_int64_t signed 64 bit
* khronos_uint64_t unsigned 64 bit
* khronos_intptr_t signed same number of bits as a pointer
* khronos_uintptr_t unsigned same number of bits as a pointer
* khronos_ssize_t signed size
* khronos_usize_t unsigned size
* khronos_float_t signed 32 bit floating point
* khronos_time_ns_t unsigned 64 bit time in nanoseconds
* khronos_utime_nanoseconds_t unsigned time interval or absolute time in
* nanoseconds
* khronos_stime_nanoseconds_t signed time interval in nanoseconds
* khronos_boolean_enum_t enumerated boolean type. This should
* only be used as a base type when a client API's boolean type is
* an enum. Client APIs which use an integer or other type for
* booleans cannot use this as the base type for their boolean.
*
* Tokens defined in khrplatform.h:
*
* KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
*
* KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
* KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
*
* Calling convention macros defined in this file:
* KHRONOS_APICALL
* KHRONOS_APIENTRY
* KHRONOS_APIATTRIBUTES
*
* These may be used in function prototypes as:
*
* KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
* int arg1,
* int arg2) KHRONOS_APIATTRIBUTES;
*/
#if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
# define KHRONOS_STATIC 1
#endif
/*-------------------------------------------------------------------------
* Definition of KHRONOS_APICALL
*-------------------------------------------------------------------------
* This precedes the return type of the function in the function prototype.
*/
#if defined(KHRONOS_STATIC)
/* If the preprocessor constant KHRONOS_STATIC is defined, make the
* header compatible with static linking. */
# define KHRONOS_APICALL
#elif defined(_WIN32)
# define KHRONOS_APICALL __declspec(dllimport)
#elif defined (__SYMBIAN32__)
# define KHRONOS_APICALL IMPORT_C
#elif defined(__ANDROID__)
# define KHRONOS_APICALL __attribute__((visibility("default")))
#else
# define KHRONOS_APICALL
#endif
/*-------------------------------------------------------------------------
* Definition of KHRONOS_APIENTRY
*-------------------------------------------------------------------------
* This follows the return type of the function and precedes the function
* name in the function prototype.
*/
#if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
/* Win32 but not WinCE */
# define KHRONOS_APIENTRY __stdcall
#else
# define KHRONOS_APIENTRY
#endif
/*-------------------------------------------------------------------------
* Definition of KHRONOS_APIATTRIBUTES
*-------------------------------------------------------------------------
* This follows the closing parenthesis of the function prototype arguments.
*/
#if defined (__ARMCC_2__)
#define KHRONOS_APIATTRIBUTES __softfp
#else
#define KHRONOS_APIATTRIBUTES
#endif
/*-------------------------------------------------------------------------
* basic type definitions
*-----------------------------------------------------------------------*/
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
/*
* Using <stdint.h>
*/
#include <stdint.h>
typedef int32_t khronos_int32_t;
typedef uint32_t khronos_uint32_t;
typedef int64_t khronos_int64_t;
typedef uint64_t khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#elif defined(__VMS ) || defined(__sgi)
/*
* Using <inttypes.h>
*/
#include <inttypes.h>
typedef int32_t khronos_int32_t;
typedef uint32_t khronos_uint32_t;
typedef int64_t khronos_int64_t;
typedef uint64_t khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
/*
* Win32
*/
typedef __int32 khronos_int32_t;
typedef unsigned __int32 khronos_uint32_t;
typedef __int64 khronos_int64_t;
typedef unsigned __int64 khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#elif defined(__sun__) || defined(__digital__)
/*
* Sun or Digital
*/
typedef int khronos_int32_t;
typedef unsigned int khronos_uint32_t;
#if defined(__arch64__) || defined(_LP64)
typedef long int khronos_int64_t;
typedef unsigned long int khronos_uint64_t;
#else
typedef long long int khronos_int64_t;
typedef unsigned long long int khronos_uint64_t;
#endif /* __arch64__ */
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#elif 0
/*
* Hypothetical platform with no float or int64 support
*/
typedef int khronos_int32_t;
typedef unsigned int khronos_uint32_t;
#define KHRONOS_SUPPORT_INT64 0
#define KHRONOS_SUPPORT_FLOAT 0
#else
/*
* Generic fallback
*/
#include <stdint.h>
typedef int32_t khronos_int32_t;
typedef uint32_t khronos_uint32_t;
typedef int64_t khronos_int64_t;
typedef uint64_t khronos_uint64_t;
#define KHRONOS_SUPPORT_INT64 1
#define KHRONOS_SUPPORT_FLOAT 1
#endif
/*
* Types that are (so far) the same on all platforms
*/
typedef signed char khronos_int8_t;
typedef unsigned char khronos_uint8_t;
typedef signed short int khronos_int16_t;
typedef unsigned short int khronos_uint16_t;
/*
* Types that differ between LLP64 and LP64 architectures - in LLP64,
* pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
* to be the only LLP64 architecture in current use.
*/
#ifdef _WIN64
typedef signed long long int khronos_intptr_t;
typedef unsigned long long int khronos_uintptr_t;
typedef signed long long int khronos_ssize_t;
typedef unsigned long long int khronos_usize_t;
#else
typedef signed long int khronos_intptr_t;
typedef unsigned long int khronos_uintptr_t;
typedef signed long int khronos_ssize_t;
typedef unsigned long int khronos_usize_t;
#endif
#if KHRONOS_SUPPORT_FLOAT
/*
* Float type
*/
typedef float khronos_float_t;
#endif
#if KHRONOS_SUPPORT_INT64
/* Time types
*
* These types can be used to represent a time interval in nanoseconds or
* an absolute Unadjusted System Time. Unadjusted System Time is the number
* of nanoseconds since some arbitrary system event (e.g. since the last
* time the system booted). The Unadjusted System Time is an unsigned
* 64 bit value that wraps back to 0 every 584 years. Time intervals
* may be either signed or unsigned.
*/
typedef khronos_uint64_t khronos_utime_nanoseconds_t;
typedef khronos_int64_t khronos_stime_nanoseconds_t;
#endif
/*
* Dummy value used to pad enum types to 32 bits.
*/
#ifndef KHRONOS_MAX_ENUM
#define KHRONOS_MAX_ENUM 0x7FFFFFFF
#endif
/*
* Enumerated boolean type
*
* Values other than zero should be considered to be true. Therefore
* comparisons should not be made against KHRONOS_TRUE.
*/
typedef enum {
KHRONOS_FALSE = 0,
KHRONOS_TRUE = 1,
KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
} khronos_boolean_enum_t;
#endif /* __khrplatform_h_ */
This is free and unencumbered software released into the public domain.
Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.
In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
This diff is collapsed.
file(GLOB ROOT_SOURCE *.cpp)
file(GLOB ROOT_INLINE *.inl)
file(GLOB ROOT_HEADER *.hpp)
file(GLOB ROOT_TEXT ../*.txt)
file(GLOB ROOT_MD ../*.md)
file(GLOB ROOT_NAT ../util/glm.natvis)
file(GLOB_RECURSE CORE_SOURCE ./detail/*.cpp)
file(GLOB_RECURSE CORE_INLINE ./detail/*.inl)
file(GLOB_RECURSE CORE_HEADER ./detail/*.hpp)
file(GLOB_RECURSE EXT_SOURCE ./ext/*.cpp)
file(GLOB_RECURSE EXT_INLINE ./ext/*.inl)
file(GLOB_RECURSE EXT_HEADER ./ext/*.hpp)
file(GLOB_RECURSE GTC_SOURCE ./gtc/*.cpp)
file(GLOB_RECURSE GTC_INLINE ./gtc/*.inl)
file(GLOB_RECURSE GTC_HEADER ./gtc/*.hpp)
file(GLOB_RECURSE GTX_SOURCE ./gtx/*.cpp)
file(GLOB_RECURSE GTX_INLINE ./gtx/*.inl)
file(GLOB_RECURSE GTX_HEADER ./gtx/*.hpp)
file(GLOB_RECURSE SIMD_SOURCE ./simd/*.cpp)
file(GLOB_RECURSE SIMD_INLINE ./simd/*.inl)
file(GLOB_RECURSE SIMD_HEADER ./simd/*.h)
source_group("Text Files" FILES ${ROOT_TEXT} ${ROOT_MD})
source_group("Core Files" FILES ${CORE_SOURCE})
source_group("Core Files" FILES ${CORE_INLINE})
source_group("Core Files" FILES ${CORE_HEADER})
source_group("EXT Files" FILES ${EXT_SOURCE})
source_group("EXT Files" FILES ${EXT_INLINE})
source_group("EXT Files" FILES ${EXT_HEADER})
source_group("GTC Files" FILES ${GTC_SOURCE})
source_group("GTC Files" FILES ${GTC_INLINE})
source_group("GTC Files" FILES ${GTC_HEADER})
source_group("GTX Files" FILES ${GTX_SOURCE})
source_group("GTX Files" FILES ${GTX_INLINE})
source_group("GTX Files" FILES ${GTX_HEADER})
source_group("SIMD Files" FILES ${SIMD_SOURCE})
source_group("SIMD Files" FILES ${SIMD_INLINE})
source_group("SIMD Files" FILES ${SIMD_HEADER})
add_library(glm INTERFACE)
target_include_directories(glm INTERFACE ../)
add_library(glm_static STATIC ${ROOT_TEXT} ${ROOT_MD} ${ROOT_NAT}
${ROOT_SOURCE} ${ROOT_INLINE} ${ROOT_HEADER}
${CORE_SOURCE} ${CORE_INLINE} ${CORE_HEADER}
${EXT_SOURCE} ${EXT_INLINE} ${EXT_HEADER}
${GTC_SOURCE} ${GTC_INLINE} ${GTC_HEADER}
${GTX_SOURCE} ${GTX_INLINE} ${GTX_HEADER}
${SIMD_SOURCE} ${SIMD_INLINE} ${SIMD_HEADER})
target_link_libraries(glm_static PUBLIC glm)
add_library(glm::glm_static ALIAS glm_static)
This diff is collapsed.
================================================================================
OpenGL Mathematics (GLM)
--------------------------------------------------------------------------------
GLM is licensed under The Happy Bunny License or MIT License
================================================================================
The Happy Bunny License (Modified MIT License)
--------------------------------------------------------------------------------
Copyright (c) 2005 - G-Truc Creation
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
Restrictions:
By making use of the Software for military purposes, you choose to make a
Bunny unhappy.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
================================================================================
The MIT License
--------------------------------------------------------------------------------
Copyright (c) 2005 - G-Truc Creation
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
#pragma once
// #define GLM_CXX98_EXCEPTIONS
// #define GLM_CXX98_RTTI
// #define GLM_CXX11_RVALUE_REFERENCES
// Rvalue references - GCC 4.3
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2118.html
// GLM_CXX11_TRAILING_RETURN
// Rvalue references for *this - GCC not supported
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2439.htm
// GLM_CXX11_NONSTATIC_MEMBER_INIT
// Initialization of class objects by rvalues - GCC any
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1610.html
// GLM_CXX11_NONSTATIC_MEMBER_INIT
// Non-static data member initializers - GCC 4.7
// http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2008/n2756.htm
// #define GLM_CXX11_VARIADIC_TEMPLATE
// Variadic templates - GCC 4.3
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2242.pdf
//
// Extending variadic template template parameters - GCC 4.4
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2555.pdf
// #define GLM_CXX11_GENERALIZED_INITIALIZERS
// Initializer lists - GCC 4.4
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2672.htm
// #define GLM_CXX11_STATIC_ASSERT
// Static assertions - GCC 4.3
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1720.html
// #define GLM_CXX11_AUTO_TYPE
// auto-typed variables - GCC 4.4
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1984.pdf
// #define GLM_CXX11_AUTO_TYPE
// Multi-declarator auto - GCC 4.4
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1737.pdf
// #define GLM_CXX11_AUTO_TYPE
// Removal of auto as a storage-class specifier - GCC 4.4
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2546.htm
// #define GLM_CXX11_AUTO_TYPE
// New function declarator syntax - GCC 4.4
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2541.htm
// #define GLM_CXX11_LAMBDAS
// New wording for C++0x lambdas - GCC 4.5
// http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2927.pdf
// #define GLM_CXX11_DECLTYPE
// Declared type of an expression - GCC 4.3
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2343.pdf
//
// Right angle brackets - GCC 4.3
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1757.html
//
// Default template arguments for function templates DR226 GCC 4.3
// http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#226
//
// Solving the SFINAE problem for expressions DR339 GCC 4.4
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2634.html
// #define GLM_CXX11_ALIAS_TEMPLATE
// Template aliases N2258 GCC 4.7
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2258.pdf
//
// Extern templates N1987 Yes
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1987.htm
// #define GLM_CXX11_NULLPTR
// Null pointer constant N2431 GCC 4.6
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2431.pdf
// #define GLM_CXX11_STRONG_ENUMS
// Strongly-typed enums N2347 GCC 4.4
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2347.pdf
//
// Forward declarations for enums N2764 GCC 4.6
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2764.pdf
//
// Generalized attributes N2761 GCC 4.8