mirror of
https://github.com/mpv-player/mpv
synced 2024-11-18 21:16:10 +01:00
1a1e631ccd
There is no standard mechanism for detecting endianess. Doing it at compile time in a portable way is probably hard. Doing it properly with a configure check is probably hard too. Using the endian definitions in <sys/types.h> (usually includes <endian.h>, which is not available everywhere) works under circumstances, but the previous commit broke it on OSX. Ideally all code should be endian dependent, but that is not possible due to the dependencies (such as FFmpeg, some video output APIs, some audio output APIs). Create a header osdep/endian.h, which contains various fallbacks. Note that the last fallback uses libavutil; however, it's not clear whether AV_HAVE_BIGENDIAN is a public symbol, or whether including <libavutil/bswap.h> really makes it visible. And in fact we don't want to pollute the namespace with libavutil definitions either. Thus it's only the last fallback.
71 lines
2.5 KiB
Python
71 lines
2.5 KiB
Python
from waflib import Utils
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def __get_cc_env_vars__(cc):
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cmd = cc + ['-dM', '-E', '-']
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try:
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p = Utils.subprocess.Popen(cmd, stdin=Utils.subprocess.PIPE,
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stdout=Utils.subprocess.PIPE,
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stderr=Utils.subprocess.PIPE)
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p.stdin.write('\n'.encode())
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return p.communicate()[0]
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except Exception:
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return ""
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def __test_and_add_flags__(ctx, flags):
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for flag in flags:
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ctx.check_cc(cflags=flag, uselib_store="compiler", mandatory=False)
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ctx.env.CFLAGS += ctx.env.CFLAGS_compiler
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def __add_generic_flags__(ctx):
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ctx.env.CFLAGS += ["-D_ISOC99_SOURCE", "-D_POSIX_C_SOURCE=200809L",
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"-D_BSD_SOURCE", "-D_XOPEN_SOURCE=700",
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"-D_LARGEFILE_SOURCE", "-D_FILE_OFFSET_BITS=64",
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"-D_LARGEFILE64_SOURCE",
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"-std=c99", "-Wall"]
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if ctx.is_debug_build():
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ctx.env.CFLAGS += ['-g']
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def __add_gcc_flags__(ctx):
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ctx.env.CFLAGS += ["-Wall", "-Wundef", "-Wmissing-prototypes", "-Wshadow",
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"-Wno-switch", "-Wno-parentheses", "-Wpointer-arith",
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"-Wredundant-decls", "-Wno-pointer-sign",
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"-Werror=implicit-function-declaration",
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"-Wno-error=deprecated-declarations",
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"-Wno-error=unused-function" ]
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__test_and_add_flags__(ctx, ["-Wempty-body"])
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__test_and_add_flags__(ctx, ["-Wdisabled-optimization"])
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__test_and_add_flags__(ctx, ["-Wstrict-prototypes"])
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def __add_clang_flags__(ctx):
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ctx.env.CFLAGS += ["-Wno-logical-op-parentheses", "-fcolor-diagnostics",
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"-Wno-tautological-compare",
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"-Wno-tautological-constant-out-of-range-compare" ]
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def __add_mingw_flags__(ctx):
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ctx.env.CFLAGS += ['-D__USE_MINGW_ANSI_STDIO=1']
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ctx.env.LAST_LINKFLAGS += ['-mwindows']
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def __add_cygwin_flags__(ctx):
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ctx.env.CFLAGS += ['-mwin32']
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ctx.env.CFLAGS += ['-U__STRICT_ANSI__']
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__compiler_map__ = {
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'__GNUC__': __add_gcc_flags__,
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'__clang__': __add_clang_flags__,
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'__MINGW32__': __add_mingw_flags__,
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'__CYGWIN__': __add_cygwin_flags__,
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}
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def __apply_map__(ctx, fnmap):
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if not getattr(ctx, 'CC_ENV_VARS', None):
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ctx.CC_ENV_VARS = str(__get_cc_env_vars__(ctx.env.CC))
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for k, fn in fnmap.items():
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if ctx.CC_ENV_VARS.find(k) > 0:
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fn(ctx)
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def configure(ctx):
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__add_generic_flags__(ctx)
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__apply_map__(ctx, __compiler_map__)
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