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				https://github.com/godotengine/godot.git
				synced 2025-11-03 23:21:15 +00:00 
			
		
		
		
	We were already linking libstdc++ statically for official binaries, protecting us against most portability issues. But apparently since we started using GCC 7 for official builds, we also need to link libgcc statically for at least 32-bit builds to be portable. Fixes #16409.
		
			
				
	
	
		
			280 lines
		
	
	
	
		
			10 KiB
		
	
	
	
		
			Python
		
	
	
	
	
	
			
		
		
	
	
			280 lines
		
	
	
	
		
			10 KiB
		
	
	
	
		
			Python
		
	
	
	
	
	
import os
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import platform
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import sys
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def is_active():
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    return True
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def get_name():
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    return "X11"
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def can_build():
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    if (os.name != "posix" or sys.platform == "darwin"):
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        return False
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    # Check the minimal dependencies
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    x11_error = os.system("pkg-config --version > /dev/null")
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    if (x11_error):
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        print("pkg-config not found.. x11 disabled.")
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        return False
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    x11_error = os.system("pkg-config x11 --modversion > /dev/null ")
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    if (x11_error):
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        print("X11 not found.. x11 disabled.")
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        return False
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    x11_error = os.system("pkg-config xcursor --modversion > /dev/null ")
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    if (x11_error):
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        print("xcursor not found.. x11 disabled.")
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        return False
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    x11_error = os.system("pkg-config xinerama --modversion > /dev/null ")
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    if (x11_error):
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        print("xinerama not found.. x11 disabled.")
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        return False
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    x11_error = os.system("pkg-config xrandr --modversion > /dev/null ")
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    if (x11_error):
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        print("xrandr not found.. x11 disabled.")
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        return False
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    return True
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def get_opts():
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    from SCons.Variables import BoolVariable, EnumVariable
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    return [
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        BoolVariable('use_llvm', 'Use the LLVM compiler', False),
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        BoolVariable('use_static_cpp', 'Link libgcc and libstdc++ statically for better portability', False),
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        BoolVariable('use_sanitizer', 'Use LLVM compiler address sanitizer', False),
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        BoolVariable('use_leak_sanitizer', 'Use LLVM compiler memory leaks sanitizer (implies use_sanitizer)', False),
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        BoolVariable('pulseaudio', 'Detect & use pulseaudio', True),
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        BoolVariable('udev', 'Use udev for gamepad connection callbacks', False),
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        EnumVariable('debug_symbols', 'Add debug symbols to release version', 'yes', ('yes', 'no', 'full')),
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        BoolVariable('separate_debug_symbols', 'Create a separate file with the debug symbols', False),
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        BoolVariable('touch', 'Enable touch events', True),
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    ]
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def get_flags():
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    return [
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        ('builtin_freetype', False),
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        ('builtin_libpng', False),
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        ('builtin_zlib', False),
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    ]
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def configure(env):
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    ## Build type
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    if (env["target"] == "release"):
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        # -O3 -ffast-math is identical to -Ofast. We need to split it out so we can selectively disable
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        # -ffast-math in code for which it generates wrong results.
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        env.Prepend(CCFLAGS=['-O3', '-ffast-math'])
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        if (env["debug_symbols"] == "yes"):
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            env.Prepend(CCFLAGS=['-g1'])
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        if (env["debug_symbols"] == "full"):
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            env.Prepend(CCFLAGS=['-g2'])
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    elif (env["target"] == "release_debug"):
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        env.Prepend(CCFLAGS=['-O2', '-ffast-math', '-DDEBUG_ENABLED'])
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        if (env["debug_symbols"] == "yes"):
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            env.Prepend(CCFLAGS=['-g1'])
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        if (env["debug_symbols"] == "full"):
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            env.Prepend(CCFLAGS=['-g2'])
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    elif (env["target"] == "debug"):
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        env.Prepend(CCFLAGS=['-g3', '-DDEBUG_ENABLED', '-DDEBUG_MEMORY_ENABLED'])
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        env.Append(LINKFLAGS=['-rdynamic'])
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    ## Architecture
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    is64 = sys.maxsize > 2**32
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    if (env["bits"] == "default"):
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        env["bits"] = "64" if is64 else "32"
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    ## Compiler configuration
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    if 'CXX' in env and 'clang' in env['CXX']:
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        # Convenience check to enforce the use_llvm overrides when CXX is clang(++)
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        env['use_llvm'] = True
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    if env['use_llvm']:
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        if ('clang++' not in env['CXX']):
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            env["CC"] = "clang"
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            env["CXX"] = "clang++"
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            env["LINK"] = "clang++"
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        env.Append(CPPFLAGS=['-DTYPED_METHOD_BIND'])
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        env.extra_suffix = ".llvm" + env.extra_suffix
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    # leak sanitizer requires (address) sanitizer
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    if env['use_sanitizer'] or env['use_leak_sanitizer']:
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        env.Append(CCFLAGS=['-fsanitize=address', '-fno-omit-frame-pointer'])
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        env.Append(LINKFLAGS=['-fsanitize=address'])
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        env.extra_suffix += "s"
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        if env['use_leak_sanitizer']:
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            env.Append(CCFLAGS=['-fsanitize=leak'])
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            env.Append(LINKFLAGS=['-fsanitize=leak'])
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    if env['use_lto']:
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        env.Append(CCFLAGS=['-flto'])
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        if not env['use_llvm'] and env.GetOption("num_jobs") > 1:
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            env.Append(LINKFLAGS=['-flto=' + str(env.GetOption("num_jobs"))])
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        else:
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            env.Append(LINKFLAGS=['-flto'])
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        if not env['use_llvm']:
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            env['RANLIB'] = 'gcc-ranlib'
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            env['AR'] = 'gcc-ar'
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    env.Append(CCFLAGS=['-pipe'])
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    env.Append(LINKFLAGS=['-pipe'])
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    ## Dependencies
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    env.ParseConfig('pkg-config x11 --cflags --libs')
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    env.ParseConfig('pkg-config xcursor --cflags --libs')
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    env.ParseConfig('pkg-config xinerama --cflags --libs')
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    env.ParseConfig('pkg-config xrandr --cflags --libs')
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    if (env['touch']):
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        x11_error = os.system("pkg-config xi --modversion > /dev/null ")
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        if (x11_error):
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            print("xi not found.. cannot build with touch. Aborting.")
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            sys.exit(255)
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        env.ParseConfig('pkg-config xi --cflags --libs')
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        env.Append(CPPFLAGS=['-DTOUCH_ENABLED'])
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    # FIXME: Check for existence of the libs before parsing their flags with pkg-config
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    if not env['builtin_mbedtls']:
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        # mbedTLS does not provide a pkgconfig config yet. See https://github.com/ARMmbed/mbedtls/issues/228
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        env.Append(LIBS=['mbedtls', 'mbedcrypto', 'mbedx509'])
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    if not env['builtin_libwebp']:
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        env.ParseConfig('pkg-config libwebp --cflags --libs')
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    # freetype depends on libpng and zlib, so bundling one of them while keeping others
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    # as shared libraries leads to weird issues
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    if env['builtin_freetype'] or env['builtin_libpng'] or env['builtin_zlib']:
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        env['builtin_freetype'] = True
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        env['builtin_libpng'] = True
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        env['builtin_zlib'] = True
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    if not env['builtin_freetype']:
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        env.ParseConfig('pkg-config freetype2 --cflags --libs')
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    if not env['builtin_libpng']:
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        env.ParseConfig('pkg-config libpng --cflags --libs')
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    if not env['builtin_bullet']:
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        # We need at least version 2.88
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        import subprocess
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        bullet_version = subprocess.check_output(['pkg-config', 'bullet', '--modversion']).strip()
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        if bullet_version < "2.88":
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            # Abort as system bullet was requested but too old
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            print("Bullet: System version {0} does not match minimal requirements ({1}). Aborting.".format(bullet_version, "2.88"))
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            sys.exit(255)
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        env.ParseConfig('pkg-config bullet --cflags --libs')
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    if not env['builtin_enet']:
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        env.ParseConfig('pkg-config libenet --cflags --libs')
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    if not env['builtin_squish'] and env['tools']:
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        env.ParseConfig('pkg-config libsquish --cflags --libs')
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    if not env['builtin_zstd']:
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        env.ParseConfig('pkg-config libzstd --cflags --libs')
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    # Sound and video libraries
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    # Keep the order as it triggers chained dependencies (ogg needed by others, etc.)
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    if not env['builtin_libtheora']:
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        env['builtin_libogg'] = False  # Needed to link against system libtheora
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        env['builtin_libvorbis'] = False  # Needed to link against system libtheora
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        env.ParseConfig('pkg-config theora theoradec --cflags --libs')
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    if not env['builtin_libvpx']:
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        env.ParseConfig('pkg-config vpx --cflags --libs')
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    if not env['builtin_libvorbis']:
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        env['builtin_libogg'] = False  # Needed to link against system libvorbis
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        env.ParseConfig('pkg-config vorbis vorbisfile --cflags --libs')
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    if not env['builtin_opus']:
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        env['builtin_libogg'] = False  # Needed to link against system opus
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        env.ParseConfig('pkg-config opus opusfile --cflags --libs')
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    if not env['builtin_libogg']:
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        env.ParseConfig('pkg-config ogg --cflags --libs')
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    if env['builtin_libtheora']:
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        list_of_x86 = ['x86_64', 'x86', 'i386', 'i586']
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        if any(platform.machine() in s for s in list_of_x86):
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            env["x86_libtheora_opt_gcc"] = True
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    # On Linux wchar_t should be 32-bits
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    # 16-bit library shouldn't be required due to compiler optimisations
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    if not env['builtin_pcre2']:
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        env.ParseConfig('pkg-config libpcre2-32 --cflags --libs')
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    ## Flags
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    if (os.system("pkg-config --exists alsa") == 0): # 0 means found
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        print("Enabling ALSA")
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        env.Append(CPPFLAGS=["-DALSA_ENABLED"])
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        env.ParseConfig('pkg-config alsa --cflags --libs')
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    else:
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        print("ALSA libraries not found, disabling driver")
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    if env['pulseaudio']:
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        if (os.system("pkg-config --exists libpulse-simple") == 0): # 0 means found
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            print("Enabling PulseAudio")
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            env.Append(CPPFLAGS=["-DPULSEAUDIO_ENABLED"])
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            env.ParseConfig('pkg-config --cflags --libs libpulse-simple')
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        else:
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            print("PulseAudio development libraries not found, disabling driver")
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    if (platform.system() == "Linux"):
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        env.Append(CPPFLAGS=["-DJOYDEV_ENABLED"])
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        if env['udev']:
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            if (os.system("pkg-config --exists libudev") == 0): # 0 means found
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                print("Enabling udev support")
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                env.Append(CPPFLAGS=["-DUDEV_ENABLED"])
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                env.ParseConfig('pkg-config libudev --cflags --libs')
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            else:
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                print("libudev development libraries not found, disabling udev support")
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    # Linkflags below this line should typically stay the last ones
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    if not env['builtin_zlib']:
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        env.ParseConfig('pkg-config zlib --cflags --libs')
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    env.Append(CPPPATH=['#platform/x11'])
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    env.Append(CPPFLAGS=['-DX11_ENABLED', '-DUNIX_ENABLED', '-DOPENGL_ENABLED', '-DGLES_ENABLED', '-DGLES_OVER_GL'])
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    env.Append(LIBS=['GL', 'pthread'])
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    if (platform.system() == "Linux"):
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        env.Append(LIBS=['dl'])
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    if (platform.system().find("BSD") >= 0):
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        env.Append(LIBS=['execinfo'])
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    ## Cross-compilation
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    if (is64 and env["bits"] == "32"):
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        env.Append(CPPFLAGS=['-m32'])
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        env.Append(LINKFLAGS=['-m32', '-L/usr/lib/i386-linux-gnu'])
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    elif (not is64 and env["bits"] == "64"):
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        env.Append(CPPFLAGS=['-m64'])
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        env.Append(LINKFLAGS=['-m64', '-L/usr/lib/i686-linux-gnu'])
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    # Link those statically for portability
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    if env['use_static_cpp']:
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        env.Append(LINKFLAGS=['-static-libgcc', '-static-libstdc++'])
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