AVR-GCCがパスに入っている状況下で以下のコマンド。
avr-gcc -dM -E - < /dev/null
その結果:
#define AVR 1 #define __AVR 1 #define __AVR_2_BYTE_PC__ 1 #define __AVR_ARCH__ 2 #define __AVR__ 1 #define __CHAR_BIT__ 8 #define __DBL_DENORM_MIN__ 1.40129846e-45 #define __DBL_DIG__ 6 #define __DBL_EPSILON__ 1.19209290e-7 #define __DBL_HAS_DENORM__ 1 #define __DBL_HAS_INFINITY__ 1 #define __DBL_HAS_QUIET_NAN__ 1 #define __DBL_MANT_DIG__ 24 #define __DBL_MAX_10_EXP__ 38 #define __DBL_MAX_EXP__ 128 #define __DBL_MAX__ 3.40282347e+38 #define __DBL_MIN_10_EXP__ (-37) #define __DBL_MIN_EXP__ (-125) #define __DBL_MIN__ 1.17549435e-38 #define __DEC128_DEN__ 0.000000000000000000000000000000001E-6143DL #define __DEC128_EPSILON__ 1E-33DL #define __DEC128_MANT_DIG__ 34 #define __DEC128_MAX_EXP__ 6144 #define __DEC128_MAX__ 9.999999999999999999999999999999999E6144DL #define __DEC128_MIN_EXP__ (-6143) #define __DEC128_MIN__ 1E-6143DL #define __DEC32_DEN__ 0.000001E-95DF #define __DEC32_EPSILON__ 1E-6DF #define __DEC32_MANT_DIG__ 7 #define __DEC32_MAX_EXP__ 96 #define __DEC32_MAX__ 9.999999E96DF #define __DEC32_MIN_EXP__ (-95) #define __DEC32_MIN__ 1E-95DF #define __DEC64_DEN__ 0.000000000000001E-383DD #define __DEC64_EPSILON__ 1E-15DD #define __DEC64_MANT_DIG__ 16 #define __DEC64_MAX_EXP__ 384 #define __DEC64_MAX__ 9.999999999999999E384DD #define __DEC64_MIN_EXP__ (-383) #define __DEC64_MIN__ 1E-383DD #define __DECIMAL_DIG__ 9 #define __DEC_EVAL_METHOD__ 2 #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_DENORM__ 1 #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_EXP__ 128 #define __FLT_MAX__ 3.40282347e+38F #define __FLT_MIN_10_EXP__ (-37) #define __FLT_MIN_EXP__ (-125) #define __FLT_MIN__ 1.17549435e-38F #define __FLT_RADIX__ 2 #define __GNUC_GNU_INLINE__ 1 #define __GNUC_MINOR__ 3 #define __GNUC_PATCHLEVEL__ 0 #define __GNUC__ 4 #define __GXX_ABI_VERSION 1002 #define __INTMAX_MAX__ 9223372036854775807LL #define __INTMAX_TYPE__ long long int #define __INT_MAX__ 32767 #define __LDBL_DENORM_MIN__ 1.40129846e-45L #define __LDBL_DIG__ 6 #define __LDBL_EPSILON__ 1.19209290e-7L #define __LDBL_HAS_DENORM__ 1 #define __LDBL_HAS_INFINITY__ 1 #define __LDBL_HAS_QUIET_NAN__ 1 #define __LDBL_MANT_DIG__ 24 #define __LDBL_MAX_10_EXP__ 38 #define __LDBL_MAX_EXP__ 128 #define __LDBL_MAX__ 3.40282347e+38L #define __LDBL_MIN_10_EXP__ (-37) #define __LDBL_MIN_EXP__ (-125) #define __LDBL_MIN__ 1.17549435e-38L #define __LONG_LONG_MAX__ 9223372036854775807LL #define __LONG_MAX__ 2147483647L #define __NO_INLINE__ 1 #define __PTRDIFF_TYPE__ int #define __REGISTER_PREFIX__ #define __SCHAR_MAX__ 127 #define __SHRT_MAX__ 32767 #define __SIZEOF_DOUBLE__ 4 #define __SIZEOF_FLOAT__ 4 #define __SIZEOF_INT__ 2 #define __SIZEOF_LONG_DOUBLE__ 4 #define __SIZEOF_LONG_LONG__ 8 #define __SIZEOF_LONG__ 4 #define __SIZEOF_POINTER__ 2 #define __SIZEOF_PTRDIFF_T__ 2 #define __SIZEOF_SHORT__ 2 #define __SIZEOF_SIZE_T__ 2 #define __SIZEOF_WCHAR_T__ 2 #define __SIZEOF_WINT_T__ 2 #define __SIZE_TYPE__ unsigned int #define __STDC_HOSTED__ 1 #define __STDC__ 1 #define __UINTMAX_TYPE__ long long unsigned int #define __USER_LABEL_PREFIX__ #define __USING_SJLJ_EXCEPTIONS__ 1 #define __VERSION__ "4.3.0" #define __WCHAR_MAX__ 32767 #define __WCHAR_TYPE__ int #define __WINT_TYPE__ unsigned int