Come rilevare la compilazione android ndk in C/C++ il file?

C’è una macro di preprocessore che mi permette di sapere ndk è la compilazione del mio codice? Potrei definire manualmente la mia, ma preferirei di no, se possibile.

InformationsquelleAutor Rémi | 2011-06-16

 

3 Replies
  1. 83

    È #ifdef __ANDROID__ come si è visto, eseguendo il preprocessore:

    ~$ /usr/local/android-ndk-r6/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc -E -dM - < /dev/null | grep -i android

    L’output è:

    #define __ANDROID__ 1

    Non c’è bisogno di dipendere definizione di roba nel tuo progetto, specialmente se si sta saltando il NDK sistema di generazione.

  2. 13

    Risposta breve: #ifdef ANDROID .

    Il ANDROID macro è definita per te in build-modulo.mk (parte della build standard di sistema):

    # always define ANDROID when building binaries
    #
    LOCAL_CFLAGS := -DANDROID $(LOCAL_CFLAGS)
    • Grazie per la risposta, ma questa consiste nel definire le proprie macro. Sto già facendo così, ma sarebbe bello avere una macro standard.
    • Che e ‘ il codice standard di Android un sistema di compilazione, quindi è una macro standard.
    • A cura di risposta per chiarezza.
    • Grazie. Mi dispiace di essere un po ‘ di spessore 🙂
    • Che cosa succede se non si utilizza ndk-build? Utilizzando __ANDROIDE__ è meglio, perché è costruito nella toolchain. Inoltre, ndk-build è il (lento) via d’uscita.
  3. 8

    Questo è un ritardo di risposta, ma per completezza, qui ci sono le definizioni del preprocessore per android-eabi prima di inserire qualsiasi file di intestazione. Un header C++ porterà in una sfilza di altre intestazioni.

    L’output riportato di seguito è La rilevazione di Android in C/C++ Source File (Macro del Preprocessore) circa (2013) su Android NDK mailing list. Avviso __ANDROID__ è definito, ma non __android__ o ANDROID.

    $ arm-linux-androideabi-cpp -dM < /dev/null | sort
    #define __ANDROID__ 1
    #define __APCS_32__ 1
    #define __ARMEL__ 1
    #define __ARM_ARCH_5TE__ 1
    #define __ARM_EABI__ 1
    #define __ARM_FEATURE_DSP 1
    #define __ARM_PCS 1
    #define __BIGGEST_ALIGNMENT__ 8
    #define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
    #define __CHAR16_TYPE__ short unsigned int
    #define __CHAR32_TYPE__ unsigned int
    #define __CHAR_BIT__ 8
    #define __CHAR_UNSIGNED__ 1
    #define __DBL_DECIMAL_DIG__ 17
    #define __DBL_DENORM_MIN__ ((double)4.9406564584124654e-324L)
    #define __DBL_DIG__ 15
    #define __DBL_EPSILON__ ((double)2.2204460492503131e-16L)
    #define __DBL_HAS_DENORM__ 1
    #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_EXP__ 1024
    #define __DBL_MAX__ ((double)1.7976931348623157e+308L)
    #define __DBL_MIN_10_EXP__ (-307)
    #define __DBL_MIN_EXP__ (-1021)
    #define __DBL_MIN__ ((double)2.2250738585072014e-308L)
    #define __DEC128_EPSILON__ 1E-33DL
    #define __DEC128_MANT_DIG__ 34
    #define __DEC128_MAX_EXP__ 6145
    #define __DEC128_MAX__ 9.999999999999999999999999999999999E6144DL
    #define __DEC128_MIN_EXP__ (-6142)
    #define __DEC128_MIN__ 1E-6143DL
    #define __DEC128_SUBNORMAL_MIN__ 0.000000000000000000000000000000001E-6143DL
    #define __DEC32_EPSILON__ 1E-6DF
    #define __DEC32_MANT_DIG__ 7
    #define __DEC32_MAX_EXP__ 97
    #define __DEC32_MAX__ 9.999999E96DF
    #define __DEC32_MIN_EXP__ (-94)
    #define __DEC32_MIN__ 1E-95DF
    #define __DEC32_SUBNORMAL_MIN__ 0.000001E-95DF
    #define __DEC64_EPSILON__ 1E-15DD
    #define __DEC64_MANT_DIG__ 16
    #define __DEC64_MAX_EXP__ 385
    #define __DEC64_MAX__ 9.999999999999999E384DD
    #define __DEC64_MIN_EXP__ (-382)
    #define __DEC64_MIN__ 1E-383DD
    #define __DEC64_SUBNORMAL_MIN__ 0.000000000000001E-383DD
    #define __DECIMAL_DIG__ 17
    #define __DEC_EVAL_METHOD__ 2
    #define __ELF__ 1
    #define __FINITE_MATH_ONLY__ 0
    #define __FLOAT_WORD_ORDER__ __ORDER_LITTLE_ENDIAN__
    #define __FLT_DECIMAL_DIG__ 9
    #define __FLT_DENORM_MIN__ 1.4012984643248171e-45F
    #define __FLT_DIG__ 6
    #define __FLT_EPSILON__ 1.1920928955078125e-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__ 3.4028234663852886e+38F
    #define __FLT_MIN_10_EXP__ (-37)
    #define __FLT_MIN_EXP__ (-125)
    #define __FLT_MIN__ 1.1754943508222875e-38F
    #define __FLT_RADIX__ 2
    #define __GNUC_GNU_INLINE__ 1
    #define __GNUC_MINOR__ 6
    #define __GNUC_PATCHLEVEL__ 0
    #define __GNUC__ 4
    #define __GXX_ABI_VERSION 1002
    #define __GXX_TYPEINFO_EQUALITY_INLINE 0
    #define __INT16_C(c) c
    #define __INT16_MAX__ 32767
    #define __INT16_TYPE__ short int
    #define __INT32_C(c) c
    #define __INT32_MAX__ 2147483647
    #define __INT32_TYPE__ int
    #define __INT64_C(c) c ## LL
    #define __INT64_MAX__ 9223372036854775807LL
    #define __INT64_TYPE__ long long int
    #define __INT8_C(c) c
    #define __INT8_MAX__ 127
    #define __INT8_TYPE__ signed char
    #define __INTMAX_C(c) c ## LL
    #define __INTMAX_MAX__ 9223372036854775807LL
    #define __INTMAX_TYPE__ long long int
    #define __INTPTR_MAX__ 2147483647
    #define __INTPTR_TYPE__ int
    #define __INT_FAST16_MAX__ 2147483647
    #define __INT_FAST16_TYPE__ int
    #define __INT_FAST32_MAX__ 2147483647
    #define __INT_FAST32_TYPE__ int
    #define __INT_FAST64_MAX__ 9223372036854775807LL
    #define __INT_FAST64_TYPE__ long long int
    #define __INT_FAST8_MAX__ 127
    #define __INT_FAST8_TYPE__ signed char
    #define __INT_LEAST16_MAX__ 32767
    #define __INT_LEAST16_TYPE__ short int
    #define __INT_LEAST32_MAX__ 2147483647
    #define __INT_LEAST32_TYPE__ int
    #define __INT_LEAST64_MAX__ 9223372036854775807LL
    #define __INT_LEAST64_TYPE__ long long int
    #define __INT_LEAST8_MAX__ 127
    #define __INT_LEAST8_TYPE__ signed char
    #define __INT_MAX__ 2147483647
    #define __LDBL_DENORM_MIN__ 4.9406564584124654e-324L
    #define __LDBL_DIG__ 15
    #define __LDBL_EPSILON__ 2.2204460492503131e-16L
    #define __LDBL_HAS_DENORM__ 1
    #define __LDBL_HAS_INFINITY__ 1
    #define __LDBL_HAS_QUIET_NAN__ 1
    #define __LDBL_MANT_DIG__ 53
    #define __LDBL_MAX_10_EXP__ 308
    #define __LDBL_MAX_EXP__ 1024
    #define __LDBL_MAX__ 1.7976931348623157e+308L
    #define __LDBL_MIN_10_EXP__ (-307)
    #define __LDBL_MIN_EXP__ (-1021)
    #define __LDBL_MIN__ 2.2250738585072014e-308L
    #define __LONG_LONG_MAX__ 9223372036854775807LL
    #define __LONG_MAX__ 2147483647L
    #define __NO_INLINE__ 1
    #define __ORDER_BIG_ENDIAN__ 4321
    #define __ORDER_LITTLE_ENDIAN__ 1234
    #define __ORDER_PDP_ENDIAN__ 3412
    #define __PIC__ 1
    #define __PRAGMA_REDEFINE_EXTNAME 1
    #define __PTRDIFF_MAX__ 2147483647
    #define __PTRDIFF_TYPE__ int
    #define __REGISTER_PREFIX__
    #define __SCHAR_MAX__ 127
    #define __SHRT_MAX__ 32767
    #define __SIG_ATOMIC_MAX__ 2147483647
    #define __SIG_ATOMIC_MIN__ (-__SIG_ATOMIC_MAX__ - 1)
    #define __SIG_ATOMIC_TYPE__ int
    #define __SIZEOF_DOUBLE__ 8
    #define __SIZEOF_FLOAT__ 4
    #define __SIZEOF_INT__ 4
    #define __SIZEOF_LONG_DOUBLE__ 8
    #define __SIZEOF_LONG_LONG__ 8
    #define __SIZEOF_LONG__ 4
    #define __SIZEOF_POINTER__ 4
    #define __SIZEOF_PTRDIFF_T__ 4
    #define __SIZEOF_SHORT__ 2
    #define __SIZEOF_SIZE_T__ 4
    #define __SIZEOF_WCHAR_T__ 4
    #define __SIZEOF_WINT_T__ 4
    #define __SIZE_MAX__ 4294967295U
    #define __SIZE_TYPE__ unsigned int
    #define __SOFTFP__ 1
    #define __STDC_HOSTED__ 1
    #define __STDC__ 1
    #define __THUMB_INTERWORK__ 1
    #define __UINT16_C(c) c
    #define __UINT16_MAX__ 65535
    #define __UINT16_TYPE__ short unsigned int
    #define __UINT32_C(c) c ## U
    #define __UINT32_MAX__ 4294967295U
    #define __UINT32_TYPE__ unsigned int
    #define __UINT64_C(c) c ## ULL
    #define __UINT64_MAX__ 18446744073709551615ULL
    #define __UINT64_TYPE__ long long unsigned int
    #define __UINT8_C(c) c
    #define __UINT8_MAX__ 255
    #define __UINT8_TYPE__ unsigned char
    #define __UINTMAX_C(c) c ## ULL
    #define __UINTMAX_MAX__ 18446744073709551615ULL
    #define __UINTMAX_TYPE__ long long unsigned int
    #define __UINTPTR_MAX__ 4294967295U
    #define __UINTPTR_TYPE__ unsigned int
    #define __UINT_FAST16_MAX__ 4294967295U
    #define __UINT_FAST16_TYPE__ unsigned int
    #define __UINT_FAST32_MAX__ 4294967295U
    #define __UINT_FAST32_TYPE__ unsigned int
    #define __UINT_FAST64_MAX__ 18446744073709551615ULL
    #define __UINT_FAST64_TYPE__ long long unsigned int
    #define __UINT_FAST8_MAX__ 255
    #define __UINT_FAST8_TYPE__ unsigned char
    #define __UINT_LEAST16_MAX__ 65535
    #define __UINT_LEAST16_TYPE__ short unsigned int
    #define __UINT_LEAST32_MAX__ 4294967295U
    #define __UINT_LEAST32_TYPE__ unsigned int
    #define __UINT_LEAST64_MAX__ 18446744073709551615ULL
    #define __UINT_LEAST64_TYPE__ long long unsigned int
    #define __UINT_LEAST8_MAX__ 255
    #define __UINT_LEAST8_TYPE__ unsigned char
    #define __USER_LABEL_PREFIX__
    #define __VERSION__ "4.6 20120106 (prerelease)"
    #define __VFP_FP__ 1
    #define __WCHAR_MAX__ 4294967295U
    #define __WCHAR_MIN__ 0U
    #define __WCHAR_TYPE__ unsigned int
    #define __WINT_MAX__ 4294967295U
    #define __WINT_MIN__ 0U
    #define __WINT_TYPE__ unsigned int
    #define __arm__ 1
    #define __linux 1
    #define __linux__ 1
    #define __pic__ 1
    #define __unix 1
    #define __unix__ 1
    #define linux 1
    #define unix 1 

Lascia un commento