Remove regal port

The regal project seems like its been dead for many years and the repo
from which it was forked doesn't seem to exist anymore:
https://github.com/p3/regal

I'm not sure we want to continue supporting it as first class thing if
there is nobody upstream to report issues to.  If it turns out that
there are folks who really depend on this we can consider moving it into
`tools/ports/conrib`.

See emscripten-core#21885

Author: sbc100

ChangeLog.md

@@ -20,6 +20,8 @@ See docs/process.md for more on how version tagging works.
 
 3.1.60 (in development)
 -----------------------
+- The regal port was removed since the project seems to be long dead upstream.
+  Please get in touch if you were depending on this library.
 - The `EXPORTED_FUNCTIONS` list can now include JS library symbols even if they
   have not been otherwise included (e.g. via `DEFAULT_LIBRARY_FUNCS_TO_INCLUDE`).
   (#21867)

site/source/docs/tools_reference/settings_reference.rst

@@ -1993,16 +1993,6 @@ Alternate syntax: --use-port=libpng
 
 .. note:: Applicable during both linking and compilation
 
-.. _use_regal:
-
-USE_REGAL
-=========
-
-1 = use Regal from emscripten-ports
-Alternate syntax: --use-port=regal
-
-.. note:: Applicable during both linking and compilation
-
 .. _use_boost_headers:
 
 USE_BOOST_HEADERS

src/settings.js

@@ -1540,11 +1540,6 @@ var USE_LIBJPEG = false;
 // [compile+link]
 var USE_LIBPNG = false;
 
-// 1 = use Regal from emscripten-ports
-// Alternate syntax: --use-port=regal
-// [compile+link]
-var USE_REGAL = false;
-
 // 1 = use Boost headers from emscripten-ports
 // Alternate syntax: --use-port=boost_headers
 // [compile+link]
@@ -2235,4 +2230,5 @@ var LEGACY_SETTINGS = [
   ['MIN_IE_VERSION', [0x7FFFFFFF], 'No longer supported'],
   ['WORKAROUND_OLD_WEBGL_UNIFORM_UPLOAD_IGNORED_OFFSET_BUG', [0], 'No longer supported'],
   ['AUTO_ARCHIVE_INDEXES', [0, 1], 'No longer needed'],
+  ['USE_REGAL', [0], 'No longer supported'],
 ];

test/test_browser.py

@@ -1521,12 +1521,6 @@ def test_sdl_ogl(self):
     self.reftest('test_sdl_ogl.c', 'screenshot-gray-purple.png', reference_slack=1,
                  args=['-O2', '--minify=0', '--preload-file', 'screenshot.png', '-sLEGACY_GL_EMULATION', '--use-preload-plugins', '-lSDL', '-lGL'])
 
-  @requires_graphics_hardware
-  def test_sdl_ogl_regal(self):
-    shutil.copyfile(test_file('screenshot.png'), 'screenshot.png')
-    self.reftest('test_sdl_ogl.c', 'screenshot-gray-purple.png', reference_slack=1,
-                 args=['-O2', '--minify=0', '--preload-file', 'screenshot.png', '-sUSE_REGAL', '-DUSE_REGAL', '--use-preload-plugins', '-lSDL', '-lGL', '-lc++', '-lc++abi'])
-
   @requires_graphics_hardware
   def test_sdl_ogl_defaultmatrixmode(self):
     shutil.copyfile(test_file('screenshot.png'), 'screenshot.png')
@@ -2029,11 +2023,6 @@ def test_matrix_identity(self):
   def test_cubegeom_pre(self):
     self.reftest('third_party/cubegeom/cubegeom_pre.c', 'third_party/cubegeom/cubegeom_pre.png', args=['-sLEGACY_GL_EMULATION', '-lGL', '-lSDL'])
 
-  @requires_graphics_hardware
-  @no_swiftshader
-  def test_cubegeom_pre_regal(self):
-    self.reftest('third_party/cubegeom/cubegeom_pre.c', 'third_party/cubegeom/cubegeom_pre.png', args=['-sUSE_REGAL', '-DUSE_REGAL', '-lGL', '-lSDL', '-lc++', '-lc++abi'])
-
   @requires_graphics_hardware
   @no_swiftshader
   def test_cubegeom_pre_relocatable(self):
@@ -2062,14 +2051,6 @@ def test_cubegeom(self, args):
     # proxied)
     self.reftest('third_party/cubegeom/cubegeom.c', 'third_party/cubegeom/cubegeom.png', args=['-O2', '-g', '-sLEGACY_GL_EMULATION', '-lGL', '-lSDL'] + args, also_proxied=not args)
 
-  @requires_graphics_hardware
-  def test_cubegeom_regal(self):
-    self.reftest('third_party/cubegeom/cubegeom.c', 'third_party/cubegeom/cubegeom.png', args=['-O2', '-g', '-DUSE_REGAL', '-sUSE_REGAL', '-lGL', '-lSDL', '-lc++', '-lc++abi'], also_proxied=True)
-
-  @requires_graphics_hardware
-  def test_cubegeom_regal_mt(self):
-    self.reftest('third_party/cubegeom/cubegeom.c', 'third_party/cubegeom/cubegeom.png', args=['-O2', '-g', '-pthread', '-DUSE_REGAL', '-pthread', '-sUSE_REGAL', '-lGL', '-lSDL', '-lc++', '-lc++abi'], also_proxied=False)
-
   @requires_graphics_hardware
   @parameterized({
     '': ([],),
@@ -2147,11 +2128,6 @@ def test_cubegeom_fog(self):
   def test_cubegeom_pre_vao(self):
     self.reftest('third_party/cubegeom/cubegeom_pre_vao.c', 'third_party/cubegeom/cubegeom_pre_vao.png', args=['-sLEGACY_GL_EMULATION', '-lGL', '-lSDL'])
 
-  @requires_graphics_hardware
-  @no_swiftshader
-  def test_cubegeom_pre_vao_regal(self):
-    self.reftest('third_party/cubegeom/cubegeom_pre_vao.c', 'third_party/cubegeom/cubegeom_pre_vao.png', args=['-sUSE_REGAL', '-DUSE_REGAL', '-lGL', '-lSDL', '-lc++', '-lc++abi'])
-
   @requires_graphics_hardware
   @no_swiftshader
   def test_cubegeom_pre2_vao(self):