# News
-[](https://travis-ci.org/KhronosGroup/glslang)
-[](https://ci.appveyor.com/project/Khronoswebmaster/glslang/branch/master)
+1. Visual Studio 2013 is no longer supported
+
+ [As scheduled](https://github.com/KhronosGroup/glslang/blob/9eef54b2513ca6b40b47b07d24f453848b65c0df/README.md#planned-deprecationsremovals),
+Microsoft Visual Studio 2013 is no longer officially supported. \
+ Please upgrade to at least Visual Studio 2015.
-## Planned Deprecations/Removals
+2. The versioning scheme is being improved, and you might notice some differences. This is currently WIP, but will be coming soon. See, for example, PR #2277.
-1. **SPIRV Folder, 1-May, 2020.** Glslang, when installed through CMake,
+3. If you get a new **compilation error due to a missing header**, it might be caused by this planned removal:
+
+**SPIRV Folder, 1-May, 2020.** Glslang, when installed through CMake,
will install a `SPIRV` folder into `${CMAKE_INSTALL_INCLUDEDIR}`.
This `SPIRV` folder is being moved to `glslang/SPIRV`.
During the transition the `SPIRV` folder will be installed into both locations.
The old install of `SPIRV/` will be removed as a CMake install target no sooner than May 1, 2020.
See issue #1964.
-2. **Visual Studio 2013, 20-July, 2020.** Keeping code compiling for MS Visual Studio 2013 will no longer be
-a goal as of July 20, 2020, the fifth anniversary of the release of Visual Studio 2015.
+If people are only using this location to get spirv.hpp, I recommend they get that from [SPIRV-Headers](https://github.com/KhronosGroup/SPIRV-Headers) instead.
+
+[](https://travis-ci.org/KhronosGroup/glslang)
+[](https://ci.appveyor.com/project/Khronoswebmaster/glslang/branch/master)
# Glslang Components and Status
There are several components:
-**Reference Validator and GLSL/ESSL -> AST Front End.** An OpenGL GLSL and OpenGL|ES GLSL (ESSL) front-end for reference validation and translation of GLSL/ESSL into an internal abstract syntax tree (AST).
+### Reference Validator and GLSL/ESSL -> AST Front End
+
+An OpenGL GLSL and OpenGL|ES GLSL (ESSL) front-end for reference validation and translation of GLSL/ESSL into an internal abstract syntax tree (AST).
+
+**Status**: Virtually complete, with results carrying similar weight as the specifications.
-Status: Virtually complete, with results carrying similar weight as the specifications.
+### HLSL -> AST Front End
-**HLSL -> AST Front End.** An HLSL front-end for translation of an approximation of HLSL to glslang's AST form.
+An HLSL front-end for translation of an approximation of HLSL to glslang's AST form.
-Status: Partially complete. Semantics are not reference quality and input is not validated.
+**Status**: Partially complete. Semantics are not reference quality and input is not validated.
This is in contrast to the [DXC project](https://github.com/Microsoft/DirectXShaderCompiler), which receives a much larger investment and attempts to have definitive/reference-level semantics.
See [issue 362](https://github.com/KhronosGroup/glslang/issues/362) and [issue 701](https://github.com/KhronosGroup/glslang/issues/701) for current status.
-**AST -> SPIR-V Back End.** Translates glslang's AST to the Khronos-specified SPIR-V intermediate language.
+### AST -> SPIR-V Back End
+
+Translates glslang's AST to the Khronos-specified SPIR-V intermediate language.
+
+**Status**: Virtually complete.
-Status: Virtually complete.
+### Reflector
-**Standalone Wrapper.** `glslangValidator` is command-line tool for accessing the functionality above.
+An API for getting reflection information from the AST, reflection types/variables/etc. from the HLL source (not the SPIR-V).
+
+**Status**: There is a large amount of functionality present, but no specification/goal to measure completeness against. It is accurate for the input HLL and AST, but only approximate for what would later be emitted for SPIR-V.
+
+### Standalone Wrapper
+
+`glslangValidator` is command-line tool for accessing the functionality above.
Status: Complete.
The following steps assume a Bash shell. On Windows, that could be the Git Bash
shell or some other shell of your choosing.
-#### 1) Check-Out this project
+#### 1) Check-Out this project
```bash
cd <parent of where you want glslang to be>
# "Release" (for CMAKE_BUILD_TYPE) could also be "Debug" or "RelWithDebInfo"
```
+For building on Android:
+```bash
+cmake $SOURCE_DIR -G "Unix Makefiles" -DCMAKE_INSTALL_PREFIX="$(pwd)/install" -DANDROID_ABI=arm64-v8a -DCMAKE_BUILD_TYPE=Release -DANDROID_STL=c++_static -DANDROID_PLATFORM=android-24 -DCMAKE_SYSTEM_NAME=Android -DANDROID_TOOLCHAIN=clang -DANDROID_ARM_MODE=arm -DCMAKE_MAKE_PROGRAM=$ANDROID_NDK_ROOT/prebuilt/linux-x86_64/bin/make -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK_ROOT/build/cmake/android.toolchain.cmake
+# If on Windows will be -DCMAKE_MAKE_PROGRAM=%ANDROID_NDK_ROOT%\prebuilt\windows-x86_64\bin\make.exe
+# -G is needed for building on Windows
+# -DANDROID_ABI can also be armeabi-v7a for 32 bit
+```
+
For building on Windows:
```bash
the web grammar subset (see more about the web subset in the next section).
### Building to WASM for the Web and Node
+### Building a standalone JS/WASM library for the Web and Node
Use the steps in [Build Steps](#build-steps), with the following notes/exceptions:
-* For building the web subset of core glslang:
- + execute `updateGrammar web` from the glslang subdirectory
- (or if using your own scripts, `m4` needs a `-DGLSLANG_WEB` argument)
- + set `-DENABLE_HLSL=OFF -DBUILD_TESTING=OFF -DENABLE_OPT=OFF -DINSTALL_GTEST=OFF`
- + turn on `-DENABLE_GLSLANG_JS=ON`
- + optionally, for a minimum-size binary, turn on `-DENABLE_GLSLANG_WEBMIN=ON`
- + optionally, for GLSL compilation error messages, turn on `-DENABLE_GLSLANG_WEB_DEVEL=ON`
* `emsdk` needs to be present in your executable search path, *PATH* for
- Bash-like environments
- + [Instructions located
- here](https://emscripten.org/docs/getting_started/downloads.html#sdk-download-and-install)
+ Bash-like environments:
+ + [Instructions located here](https://emscripten.org/docs/getting_started/downloads.html#sdk-download-and-install)
* Wrap cmake call: `emcmake cmake`
+* Set `-DBUILD_TESTING=OFF -DENABLE_OPT=OFF -DINSTALL_GTEST=OFF`.
+* Set `-DENABLE_HLSL=OFF` if HLSL is not needed.
+* For a standalone JS/WASM library, turn on `-DENABLE_GLSLANG_JS=ON`.
+* For building a minimum-size web subset of core glslang:
+ + turn on `-DENABLE_GLSLANG_WEBMIN=ON` (disables HLSL)
+ + execute `updateGrammar web` from the glslang subdirectory
+ (or if using your own scripts, `m4` needs a `-DGLSLANG_WEB` argument)
+ + optionally, for GLSL compilation error messages, turn on
+ `-DENABLE_GLSLANG_WEBMIN_DEVEL=ON`
* To get a fully minimized build, make sure to use `brotli` to compress the .js
and .wasm files
Example:
```sh
-emcmake cmake -DCMAKE_BUILD_TYPE=Release -DENABLE_GLSLANG_WEB=ON \
+emcmake cmake -DCMAKE_BUILD_TYPE=Release -DENABLE_GLSLANG_JS=ON \
-DENABLE_HLSL=OFF -DBUILD_TESTING=OFF -DENABLE_OPT=OFF -DINSTALL_GTEST=OFF ..
```
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