✨ Simulator HAL and build targets (#22418)

buildroot/share/PlatformIO/scripts/common-dependencies.py

@@ -215,7 +215,13 @@ def search_compiler():
 	# Find the current platform compiler by searching the $PATH
 	# which will be in a platformio toolchain bin folder
 	path_regex = re.escape(env['PROJECT_PACKAGES_DIR'])
-	gcc = "g++"
+
+	# See if the environment provides a default compiler
+	try:
+		gcc = env.GetProjectOption('custom_deps_gcc')
+	except:
+		gcc = "g++"
+
 	if env['PLATFORM'] == 'win32':
 		path_separator = ';'
 		path_regex += r'.*\\bin'
@@ -241,6 +247,8 @@ def search_compiler():
 			return filepath
 
 	filepath = env.get('CXX')
+	if filepath == 'CC':
+		filepath = gcc
 	blab("Couldn't find a compiler! Fallback to %s" % filepath)
 	return filepath
 

buildroot/share/PlatformIO/scripts/simulator.py

@@ -0,0 +1,52 @@
+#
+# PlatformIO pre: script for simulator builds
+#
+
+# Get the environment thus far for the build
+Import("env")
+
+#print(env.Dump())
+
+#
+# Give the binary a distinctive name
+#
+
+env['PROGNAME'] = "MarlinSimulator"
+
+#
+# If Xcode is installed add the path to its Frameworks folder,
+# or if Mesa is installed try to use its GL/gl.h.
+#
+
+import sys
+if sys.platform == 'darwin':
+
+  #
+  # Silence half of the ranlib warnings. (No equivalent for 'ARFLAGS')
+  #
+  env['RANLIBFLAGS'] += [ "-no_warning_for_no_symbols" ]
+
+  # Default paths for Xcode and a lucky GL/gl.h dropped by Mesa
+  xcode_path = "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks"
+  mesa_path = "/opt/local/include/GL/gl.h"
+
+  import os.path
+
+  if os.path.exists(xcode_path):
+
+    env['BUILD_FLAGS'] += [ "-F" + xcode_path ]
+    print("Using OpenGL framework headers from Xcode.app")
+
+  elif os.path.exists(mesa_path):
+
+    env['BUILD_FLAGS'] += [ '-D__MESA__' ]
+    print("Using OpenGL header from", mesa_path)
+
+  else:
+
+    print("\n\nNo OpenGL headers found. Install Xcode for matching headers, or use 'sudo port install mesa' to get a GL/gl.h.\n\n")
+
+    # Break out of the PIO build immediately
+    sys.exit(1)
+
+env.AddCustomTarget("upload", "$BUILD_DIR/${PROGNAME}", "$BUILD_DIR/${PROGNAME}")