MarlinFirmware/buildroot/share/PlatformIO/scripts/simulator.py

#
# simulator.py
# PlatformIO pre: script for simulator builds
#

import pioutil
if pioutil.is_pio_build():
    # 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)