[FFmpeg-devel] __DARWIN__ vs. CONFIG_DARWIN vs. __SYS_DARWIN__

[Diego Biurrun]

On Mon, Aug 20, 2007 at 05:42:47PM +0100, M?ns Rullg?rd wrote:
> 
> Diego Biurrun wrote:
> > I wondered why we manually set CONFIG_DARWIN in configure.  So it seems
> > that on OS X, __DARWIN__ is not defined, but __APPLE__ is.
> >
> > In any case CONFIG_DARWIN is not a good name, since this is not
> > configurable.  I propose SYS_DARWIN instead, unless somebody has some
> > clever idea how to use __DARWIN__ or __APPLE__ directly...
> 
> What is the output of
> 
> gcc -dM -E -x c /dev/null | sort

On Linux PPC (Debian stable):

#define _ARCH_PPC 1
#define __BIG_ENDIAN__ 1
#define _BIG_ENDIAN 1
#define _CALL_SYSV 1
#define __CHAR_BIT__ 8
#define __CHAR_UNSIGNED__ 1
#define __DBL_DENORM_MIN__ 4.9406564584124654e-324
#define __DBL_DIG__ 15
#define __DBL_EPSILON__ 2.2204460492503131e-16
#define __DBL_HAS_INFINITY__ 1
#define __DBL_HAS_QUIET_NAN__ 1
#define __DBL_MANT_DIG__ 53
#define __DBL_MAX_10_EXP__ 308
#define __DBL_MAX__ 1.7976931348623157e+308
#define __DBL_MAX_EXP__ 1024
#define __DBL_MIN_10_EXP__ (-307)
#define __DBL_MIN__ 2.2250738585072014e-308
#define __DBL_MIN_EXP__ (-1021)
#define __DECIMAL_DIG__ 33
#define __ELF__ 1
#define __FINITE_MATH_ONLY__ 0
#define __FLT_DENORM_MIN__ 1.40129846e-45F
#define __FLT_DIG__ 6
#define __FLT_EPSILON__ 1.19209290e-7F
#define __FLT_EVAL_METHOD__ 0
#define __FLT_HAS_INFINITY__ 1
#define __FLT_HAS_QUIET_NAN__ 1
#define __FLT_MANT_DIG__ 24
#define __FLT_MAX_10_EXP__ 38
#define __FLT_MAX__ 3.40282347e+38F
#define __FLT_MAX_EXP__ 128
#define __FLT_MIN_10_EXP__ (-37)
#define __FLT_MIN__ 1.17549435e-38F
#define __FLT_MIN_EXP__ (-125)
#define __FLT_RADIX__ 2
#define __GNUC__ 4
#define __GNUC_GNU_INLINE__ 1
#define __GNUC_MINOR__ 1
#define __GNUC_PATCHLEVEL__ 3
#define __gnu_linux__ 1
#define __GXX_ABI_VERSION 1002
#define __INT_MAX__ 2147483647
#define __INTMAX_MAX__ 9223372036854775807LL
#define __INTMAX_TYPE__ long long int
#define __LDBL_DENORM_MIN__ 4.94065645841246544176568792868221e-324L
#define __LDBL_DIG__ 31
#define __LDBL_EPSILON__ 4.94065645841246544176568792868221e-324L
#define __LDBL_HAS_INFINITY__ 1
#define __LDBL_HAS_QUIET_NAN__ 1
#define __LDBL_MANT_DIG__ 106
#define __LDBL_MAX_10_EXP__ 308
#define __LDBL_MAX__ 1.79769313486231580793728971405301e+308L
#define __LDBL_MAX_EXP__ 1024
#define __LDBL_MIN_10_EXP__ (-291)
#define __LDBL_MIN__ 2.00416836000897277799610805135016e-292L
#define __LDBL_MIN_EXP__ (-968)
#define __linux 1
#define __linux__ 1
#define linux 1
#define __LONG_DOUBLE_128__ 1
#define __LONG_LONG_MAX__ 9223372036854775807LL
#define __LONG_MAX__ 2147483647L
#define __NO_INLINE__ 1
#define __powerpc 1
#define __powerpc__ 1
#define powerpc 1
#define __PPC 1
#define __PPC__ 1
#define PPC 1
#define __PTRDIFF_TYPE__ int
#define __REGISTER_PREFIX__ 
#define __SCHAR_MAX__ 127
#define __SHRT_MAX__ 32767
#define __SIZE_TYPE__ unsigned int
#define __STDC__ 1
#define __STDC_HOSTED__ 1
#define __UINTMAX_TYPE__ long long unsigned int
#define __unix 1
#define __unix__ 1
#define unix 1
#define __USER_LABEL_PREFIX__ 
#define __VERSION__ "4.1.3 20070718 (prerelease) (Debian 4.1.2-14)"
#define __WCHAR_MAX__ 2147483647
#define __WCHAR_TYPE__ long int
#define __WINT_TYPE__ unsigned int


On Mac OS X 10.4.9:

#define __APPLE__ 1
#define __APPLE_CC__ 4061
#define _ARCH_PPC 1
#define __BIG_ENDIAN__ 1
#define _BIG_ENDIAN 1
#define __CHAR_BIT__ 8
#define __DBL_DENORM_MIN__ 4.9406564584124654e-324
#define __DBL_DIG__ 15
#define __DBL_EPSILON__ 2.2204460492503131e-16
#define __DBL_HAS_INFINITY__ 1
#define __DBL_HAS_QUIET_NAN__ 1
#define __DBL_MANT_DIG__ 53
#define __DBL_MAX_10_EXP__ 308
#define __DBL_MAX__ 1.7976931348623157e+308
#define __DBL_MAX_EXP__ 1024
#define __DBL_MIN_10_EXP__ (-307)
#define __DBL_MIN__ 2.2250738585072014e-308
#define __DBL_MIN_EXP__ (-1021)
#define __DECIMAL_DIG__ 33
#define __DYNAMIC__ 1
#define __FINITE_MATH_ONLY__ 0
#define __FLT_DENORM_MIN__ 1.40129846e-45F
#define __FLT_DIG__ 6
#define __FLT_EPSILON__ 1.19209290e-7F
#define __FLT_EVAL_METHOD__ 0
#define __FLT_HAS_INFINITY__ 1
#define __FLT_HAS_QUIET_NAN__ 1
#define __FLT_MANT_DIG__ 24
#define __FLT_MAX_10_EXP__ 38
#define __FLT_MAX__ 3.40282347e+38F
#define __FLT_MAX_EXP__ 128
#define __FLT_MIN_10_EXP__ (-37)
#define __FLT_MIN__ 1.17549435e-38F
#define __FLT_MIN_EXP__ (-125)
#define __FLT_RADIX__ 2
#define __GNUC__ 4
#define __GNUC_MINOR__ 0
#define __GNUC_PATCHLEVEL__ 0
#define __GXX_ABI_VERSION 1002
#define __INT_MAX__ 2147483647
#define __INTMAX_MAX__ 9223372036854775807LL
#define __INTMAX_TYPE__ long long int
#define __LDBL_DENORM_MIN__ 4.94065645841246544176568792868221e-324L
#define __LDBL_DIG__ 31
#define __LDBL_EPSILON__ 4.94065645841246544176568792868221e-324L
#define __LDBL_HAS_INFINITY__ 1
#define __LDBL_HAS_QUIET_NAN__ 1
#define __LDBL_MANT_DIG__ 106
#define __LDBL_MAX_10_EXP__ 308
#define __LDBL_MAX__ 1.79769313486231580793728971405301e+308L
#define __LDBL_MAX_EXP__ 1024
#define __LDBL_MIN_10_EXP__ (-291)
#define __LDBL_MIN__ 2.00416836000897277799610805135016e-292L
#define __LDBL_MIN_EXP__ (-968)
#define __LONG_DOUBLE_128__ 1
#define __LONG_LONG_MAX__ 9223372036854775807LL
#define __LONG_MAX__ 2147483647L
#define __MACH__ 1
#define __NATURAL_ALIGNMENT__ 1
#define __NO_INLINE__ 1
#define __POWERPC__ 1
#define __ppc__ 1
#define __PTRDIFF_TYPE__ int
#define __REGISTER_PREFIX__ 
#define __SCHAR_MAX__ 127
#define __SHRT_MAX__ 32767
#define __SIZE_TYPE__ long unsigned int
#define __STDC_HOSTED__ 1
#define __strong 
#define __UINTMAX_TYPE__ long long unsigned int
#define __USER_LABEL_PREFIX__ _
#define __VERSION__ "4.0.0 20041026 (Apple Computer, Inc. build 4061)"
#define __WCHAR_MAX__ 2147483647
#define __WCHAR_TYPE__ int
#define __WINT_TYPE__ int

Diego