Improvements to Technics KN5000 #1

	name: Rebuild BGFX shaders

	on:
	push:
	paths:
	- '.github/workflows/**'
	- 'src/osd/modules/render/bgfx/shaders/**'
	pull_request:
	paths:
	- '.github/workflows/**'
	- 'src/osd/modules/render/bgfx/shaders/**'

	permissions:
	contents: read

	jobs:
	rebuild:
	runs-on: windows-latest
	defaults:
	run:
	shell: msys2 {0}
	steps:
	- uses: msys2/setup-msys2@v2
	with:
	install: git make mingw-w64-x86_64-gcc mingw-w64-x86_64-python mingw-w64-x86_64-libc++
	- uses: actions/checkout@main
	with:
	fetch-depth: 0
	- name: Prevent make from rebuilding GLSL parser source
	run: \|
	touch 3rdparty/bgfx/3rdparty/glsl-optimizer/src/glsl/glcpp/glcpp-lex.c
	touch 3rdparty/bgfx/3rdparty/glsl-optimizer/src/glsl/glcpp/glcpp-parse.c
	touch 3rdparty/bgfx/3rdparty/glsl-optimizer/src/glsl/glcpp/glcpp-parse.h
	touch 3rdparty/bgfx/3rdparty/glslang/glslang/MachineIndependent/glslang_tab.cpp
	touch 3rdparty/bgfx/3rdparty/glslang/glslang/MachineIndependent/glslang_tab.cpp.h
	- name: Build
	env:
	MINGW64: "/mingw64"
	run: make shaders
	- uses: actions/upload-artifact@main
	with:
	name: mame-bgfx-${{ github.sha }}
	path: bgfx/shaders
	if-no-files-found: error

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