On Jun 15, 2005, at 11:21 AM, Dan Grassi wrote: Now that i386 is in play I need to replace __ppc__ with something else. In one case I have a code file that is common to a Windows project and a Mac project. Based on the destination, Windows or Mac, I need to have different code such as typedefs, #includes, etc. What should I use to distinguish MacOSX?
In general where can I find documentation for predefined compiler symbols?
To find out what the settings are for any given compiler version, use the -E -dM options to gcc:
[~] cde% cat > foo.cp int main(int argc, const char * argv[] { return 0; }
[~] cde% gcc -E -dM foo.cp #define __DBL_MIN_EXP__ (-1021) #define __FLT_MIN__ 1.17549435e-38F #define __CHAR_BIT__ 8 #define __WCHAR_MAX__ 2147483647 #define __DBL_DENORM_MIN__ 4.9406564584124654e-324 #define __FLT_EVAL_METHOD__ 0 #define __DBL_MIN_10_EXP__ (-307) #define __FINITE_MATH_ONLY__ 0 #define __GNUC_PATCHLEVEL__ 0 #define __SHRT_MAX__ 32767 #define __LDBL_MAX__ 1.79769313486231580793728971405301e+308L #define __APPLE_CC__ 5023 #define __UINTMAX_TYPE__ long long unsigned int #define __LDBL_MAX_EXP__ 1024 #define __SCHAR_MAX__ 127 #define __USER_LABEL_PREFIX__ _ #define __STDC_HOSTED__ 1 #define __LDBL_HAS_INFINITY__ 1 #define __DBL_DIG__ 15 #define __FLT_EPSILON__ 1.19209290e-7F #define __GXX_WEAK__ 1 #define __LDBL_MIN__ 2.00416836000897277799610805135016e-292L #define __ppc__ 1 #define __strong #define __APPLE__ 1 #define __DECIMAL_DIG__ 33 #define __LDBL_HAS_QUIET_NAN__ 1 #define __DYNAMIC__ 1 #define __GNUC__ 4 #define __DBL_MAX__ 1.7976931348623157e+308 #define __DBL_HAS_INFINITY__ 1 #define __cplusplus 1 #define __DEPRECATED 1 #define __DBL_MAX_EXP__ 1024 #define __GNUG__ 4 #define __LONG_LONG_MAX__ 9223372036854775807LL #define __GXX_ABI_VERSION 1002 #define __FLT_MIN_EXP__ (-125) #define __DBL_MIN__ 2.2250738585072014e-308 #define __FLT_MIN_10_EXP__ (-37) #define __DBL_HAS_QUIET_NAN__ 1 #define __REGISTER_PREFIX__ #define __NO_INLINE__ 1 #define _ARCH_PPC 1 #define __FLT_MANT_DIG__ 24 #define __VERSION__ "4.0.0 (Apple Computer, Inc. build 5023)" #define __BIG_ENDIAN__ 1 #define _BIG_ENDIAN 1 #define __SIZE_TYPE__ long unsigned int #define __FLT_RADIX__ 2 #define __LDBL_EPSILON__ 4.94065645841246544176568792868221e-324L #define __NATURAL_ALIGNMENT__ 1 #define __FLT_HAS_QUIET_NAN__ 1 #define __FLT_MAX_10_EXP__ 38 #define __LONG_MAX__ 2147483647L #define __FLT_HAS_INFINITY__ 1 #define __EXCEPTIONS 1 #define __LDBL_MANT_DIG__ 106 #define __WCHAR_TYPE__ int #define __FLT_DIG__ 6 #define __INT_MAX__ 2147483647 #define __LONG_DOUBLE_128__ 1 #define __FLT_MAX_EXP__ 128 #define __DBL_MANT_DIG__ 53 #define __WINT_TYPE__ int #define __LDBL_MIN_EXP__ (-968) #define __MACH__ 1 #define __LDBL_MAX_10_EXP__ 308 #define __DBL_EPSILON__ 2.2204460492503131e-16 #define __INTMAX_MAX__ 9223372036854775807LL #define __FLT_DENORM_MIN__ 1.40129846e-45F #define __FLT_MAX__ 3.40282347e+38F #define __INTMAX_TYPE__ long long int #define __GNUC_MINOR__ 0 #define __DBL_MAX_10_EXP__ 308 #define __LDBL_DENORM_MIN__ 4.94065645841246544176568792868221e-324L #define __PTRDIFF_TYPE__ int #define __LDBL_MIN_10_EXP__ (-291) #define __LDBL_DIG__ 31 #define __POWERPC__ 1 #define __private_extern__ extern
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