/usr/include/glm/glm.hpp is in libglm-dev 0.9.9~a2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/// @file glm/glm.hpp
///
/// @defgroup core Core features
///
/// @brief Features that implement in C++ the GLSL specification as closely as possible.
///
/// The GLM core consists of @ref core_types "C++ types that mirror GLSL types" and
/// C++ functions that mirror the GLSL functions. It also includes
/// @ref core_precision "a set of qualifier-based types" that can be used in the appropriate
/// functions. The C++ types are all based on a basic set of @ref core_template "template types".
///
/// The best documentation for GLM Core is the current GLSL specification,
/// <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.clean.pdf">version 4.2
/// (pdf file)</a>.
///
/// GLM core functionalities require <glm/glm.hpp> to be included to be used.
///
/// @defgroup core_types Types
///
/// @brief The standard types defined by the specification.
///
/// These types are all typedefs of more generalized, template types. To see the definition
/// of these template types, go to @ref core_template.
///
/// @ingroup core
///
/// @defgroup core_precision Precision types
///
/// @brief Non-GLSL types that are used to define qualifier-based types.
///
/// The GLSL language allows the user to define the qualifier of a particular variable.
/// In OpenGL's GLSL, these qualifier qualifiers have no effect; they are there for compatibility
/// with OpenGL ES's qualifier qualifiers, where they @em do have an effect.
///
/// C++ has no language equivalent to qualifier qualifiers. So GLM provides the next-best thing:
/// a number of typedefs of the @ref core_template that use a particular qualifier.
///
/// None of these types make any guarantees about the actual qualifier used.
///
/// @ingroup core
///
/// @defgroup core_template Template types
///
/// @brief The generic template types used as the basis for the core types.
///
/// These types are all templates used to define the actual @ref core_types.
/// These templetes are implementation details of GLM types and should not be used explicitly.
///
/// @ingroup core
///
/// @defgroup gtc Stable extensions
///
/// @brief Additional features not specified by GLSL specification.
///
/// GTC extensions aim to be stable.
///
/// Even if it's highly unrecommended, it's possible to include all the extensions at once by
/// including <glm/ext.hpp>. Otherwise, each extension needs to be included a specific file.
///
/// @defgroup gtx Experimental extensions
///
/// @brief Experimental features not specified by GLSL specification.
///
/// Experimental extensions are useful functions and types, but the development of
/// their API and functionality is not necessarily stable. They can change
/// substantially between versions. Backwards compatibility is not much of an issue
/// for them.
///
/// Even if it's highly unrecommended, it's possible to include all the extensions
/// at once by including <glm/ext.hpp>. Otherwise, each extension needs to be
/// included a specific file.
///
/// @mainpage OpenGL Mathematics (GLM)
/// - Website: <a href="https://glm.g-truc.net">glm.g-truc.net</a>
/// - <a href="modules.html">GLM API documentation</a>
/// - <a href="https://github.com/g-truc/glm/blob/master/manual.md">GLM Manual</a>
#include "detail/_fixes.hpp"
#include "detail/setup.hpp"
#pragma once
#include <cmath>
#include <climits>
#include <cfloat>
#include <limits>
#include <cassert>
#include "fwd.hpp"
#if GLM_MESSAGES == GLM_MESSAGES_ENABLED && !defined(GLM_MESSAGE_CORE_INCLUDED_DISPLAYED)
# define GLM_MESSAGE_CORE_INCLUDED_DISPLAYED
# pragma message("GLM: Core library included")
#endif//GLM_MESSAGES
#include "vec2.hpp"
#include "vec3.hpp"
#include "vec4.hpp"
#include "mat2x2.hpp"
#include "mat2x3.hpp"
#include "mat2x4.hpp"
#include "mat3x2.hpp"
#include "mat3x3.hpp"
#include "mat3x4.hpp"
#include "mat4x2.hpp"
#include "mat4x3.hpp"
#include "mat4x4.hpp"
#include "trigonometric.hpp"
#include "exponential.hpp"
#include "common.hpp"
#include "packing.hpp"
#include "geometric.hpp"
#include "matrix.hpp"
#include "vector_relational.hpp"
#include "integer.hpp"
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