glslang/StandAlone
Ben Clayton fbe9a23baf Generate build information from CHANGES.md
This PR significantly reworks the way glslang is versioned.

Instead of committing changes to the `GLSLANG_MINOR_VERSION` define in
`glslang/Public/ShaderLang.h`, and using `make-revision` to generate
`GLSLANG_PATCH_LEVEL` in `glslang/Include/revision.h`, all version
information is now derived from the new `CHANGES.md` file.

`CHANGES.md` acts as the single source of truth for glslang version
information, along with a convenient place to put all release notes for
each notable change made.

`CHANGES.md` is parsed using the new `build_info.py` python script.
This script can read basic template files to produce new source files,
which it does to read the new `build_info.h.tmpl` to generate (at build
time) a glslang private header at
`<build-dir>/include/glslang/build_info.h`.
I've written generators for each of the CMake, Bazel, gn, and
`Android.mk` build scripts.

The new version code conforms to the Semantic Versioning 2.0 spec.

This new version is also used by the CMake rules to produce versioned
shared objects, including a major-versioned SONAME.

New APIs:
---------

* `glslang::GetVersion()` returns a `Version` struct with the version
  major, minor, patch and flavor.

Breaking API changes:
---------------------

* The public defines `GLSLANG_MINOR_VERSION` and `GLSLANG_PATCH_LEVEL`
  have been entirely removed.
* `glslang/Public/ShaderLang.h` and `glslang/Include/revision.h` have
  been deleted.
* Instead, `<build-dir>/include/glslang/build_info.h` is created in
  the build directory, and `<build-dir>/include` is a CMake `PUBLIC`
  (dependee-inherited) include directory for the glslang targets.
* `<build-dir>/include/glslang/build_info.h` contains the following
   new #defines:
   `GLSLANG_VERSION_MAJOR`, `GLSLANG_VERSION_MINOR`,
   `GLSLANG_VERSION_PATCH`, `GLSLANG_VERSION_FLAVOR`,
   `GLSLANG_VERSION_GREATER_THAN(major, minor, patch)`,
   `GLSLANG_VERSION_GREATER_OR_EQUAL_TO(major, minor, patch)`,
   `GLSLANG_VERSION_LESS_THAN(major, minor, patch)`,
   `GLSLANG_VERSION_LESS_OR_EQUAL_TO(major, minor, patch)`
*  The CMake install output directory contains a copy of
   `build_info.h` at: `include/glslang/build_info.h`
*  Python3 is now always required to build glslang (likely always
   required for transitive dependency builds).
2020-07-09 12:34:02 +01:00
..
CMakeLists.txt License headers: s/Google/The Khronos Group 2020-07-03 12:21:01 +01:00
DirStackFileIncluder.h Build: Fix build warnings. 2017-09-11 20:39:54 -06:00
resource_limits_c.cpp Get rid of all warnings with MSVC and clang-cl (#2177) 2020-04-10 02:39:16 -06:00
resource_limits_c.h add c wrapper for standalone ResourceLimits and remove that dependency from glslang_c_interface 2020-03-06 10:06:47 -05:00
ResourceLimits.cpp Add support for es extension GL_EXT_blend_func_extended 2020-04-30 23:21:14 -07:00
ResourceLimits.h Switch to relative include path for ResourceLimits 2019-02-02 16:18:49 +02:00
spirv-remap.cpp unused var 2020-03-30 01:38:21 +03:00
StandAlone.cpp Generate build information from CHANGES.md 2020-07-09 12:34:02 +01:00
Worklist.h This refactor the StandAlone and WorkList files in order to use more 2017-04-04 22:29:59 +02:00