1 Here, glslang proper means core GLSL parsing, HLSL parsing, and SPIR-V code 2 generation. Glslang proper requires use of two licenses, one that covers 3 non-preprocessing and an additional one that covers preprocessing. 4 5 Bison was removed long ago. You can build glslang from the source grammar, 6 using tools of your choice, without using bison or any bison files. 7 8 Other parts, outside of glslang proper, include: 9 10 - gl_types.h, only needed for OpenGL-like reflection, and can be left out of 11 a parse and codegen project. See it for its license. 12 13 - update_glslang_sources.py, which is not part of the project proper and does 14 not need to be used. 15 16 - the SPIR-V "remapper", which is optional, but has the same license as 17 glslang proper 18 19 - Google tests and SPIR-V tools, and anything in the external subdirectory 20 are external and optional; see them for their respective licenses. 21 22 -------------------------------------------------------------------------------- 23 24 The core of glslang-proper, minus the preprocessor is licenced as follows: 25 26 // 27 // Copyright (C) 2015-2018 Google, Inc. 28 // Copyright (C) <various other dates and companies> 29 // 30 // All rights reserved. 31 // 32 // Redistribution and use in source and binary forms, with or without 33 // modification, are permitted provided that the following conditions 34 // are met: 35 // 36 // Redistributions of source code must retain the above copyright 37 // notice, this list of conditions and the following disclaimer. 38 // 39 // Redistributions in binary form must reproduce the above 40 // copyright notice, this list of conditions and the following 41 // disclaimer in the documentation and/or other materials provided 42 // with the distribution. 43 // 44 // Neither the name of 3Dlabs Inc. 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