Cross compiling for Cortex A9
Michael Jones
mike at proclivis.com
Mon Jul 14 14:58:37 UTC 2014
Karel,
Thanks. This helps.
If I understand, you have Linux running on a Panda, and on that Panda system you have gcc, and you compile GHC on the Panda itself, rather than build a cross compiler. I can see the advantage of building this way.
As far as cross compilers, I have a reason for trying to build a cross compiler, other than the ability to keep the image of the target small. That is, eventually, I want to be able to compile for an RTOS and/or bare iron system. I decided that learning to cross compile for Linux first would be a good approach. Learn the build system on something known to work. So I probably will not give up on that.
I got a book on Autoconfig. I’ll just have to dig a level deeper into the whole build system. Mainly it means learning the M4 system. I have never used it.
Below are the defines from the command you suggested. Thanks for that, got me over an ignorance hump. At least this define, __ARM_ARCH_5T__, is in the aclocal.m4 file. So I will have to study the macros until I figure out what controls the gcc options passed to the gcc cross compiler. I guess my question is what actually controls this result ("target arch", "ArchARM {armISA = ARMv7, armISAExt = [VFPv3,NEON], armABI = HARD}”)?
Are these controlled by the defines below, or are they controlled by passing gcc arguments to the gcc compiler when the Haskell compiler calls gcc?
Mike
#define __ARM_SIZEOF_WCHAR_T 32
#define __ARM_ARCH_ISA_ARM 1
#define __ARM_FP 12
#define __ARM_NEON_FP 4
#define __ARM_SIZEOF_MINIMAL_ENUM 4
#define __ARM_PCS_VFP 1
#define __ARM_ARCH_5T__ 1
#define __ARM_FEATURE_CLZ 1
#define __ARM_ARCH_ISA_THUMB 1
#define __ARM_ARCH 5
#define __arm__ 1
#define __ARM_EABI__ 1
mike at ubuntu:~/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/bin/cortexa9hf-vfp-neon-poky-linux-gnueabi$ ./arm-poky-linux-gnueabi-gcc -v
Using built-in specs.
COLLECT_GCC=./arm-poky-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/libexec/cortexa9hf-vfp-neon-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/4.8.2/lto-wrapper
Target: arm-poky-linux-gnueabi
Configured with: /home/mike/fsl-community-bsp/build/tmp/work-shared/gcc-4.8.2-r0/gcc-4.8.2/configure --build=x86_64-linux --host=x86_64-linux --target=arm-poky-linux-gnueabi --prefix=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr --exec_prefix=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr --bindir=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/bin/cortexa9hf-vfp-neon-poky-linux-gnueabi --sbindir=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/bin/cortexa9hf-vfp-neon-poky-linux-gnueabi --libexecdir=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/libexec/cortexa9hf-vfp-neon-poky-linux-gnueabi --datadir=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/share --sysconfdir=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/etc --sharedstatedir=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/com --localstatedir=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/var --libdir=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/lib/cortexa9hf-vfp-neon-poky-linux-gnueabi --includedir=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/include --oldincludedir=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/include --infodir=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/share/info --mandir=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/share/man --disable-silent-rules --disable-dependency-tracking --with-libtool-sysroot=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux --enable-clocale=generic --with-gnu-ld --enable-shared --enable-languages=c,c++ --enable-threads=posix --disable-multilib --enable-c99 --enable-long-long --enable-symvers=gnu --enable-libstdcxx-pch --program-prefix=arm-poky-linux-gnueabi- --without-local-prefix --enable-target-optspace --enable-lto --enable-libssp --disable-bootstrap --disable-libmudflap --with-system-zlib --with-linker-hash-style=gnu --enable-linker-build-id --with-ppl=no --with-cloog=no --enable-checking=release --enable-cheaders=c_global --with-float=hard --with-gxx-include-dir=/home/mike/fsl-community-bsp/build/tmp/sysroots/wandboard-quad/usr/include/c++ --with-sysroot=/home/mike/fsl-community-bsp/build/tmp/sysroots/wandboard-quad --with-build-sysroot=/home/mike/fsl-community-bsp/build/tmp/sysroots/wandboard-quad --enable-poison-system-directories --disable-libunwind-exceptions --with-mpfr=/home/mike/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr --with-system-zlib --disable-nls
Thread model: posix
gcc version 4.8.2 (GCC)
mike at ubuntu:~/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/bin/cortexa9hf-vfp-neon-poky-linux-gnueabi$
#define __DBL_MIN_EXP__ (-1021)
#define __HQ_FBIT__ 15
#define __UINT_LEAST16_MAX__ 65535
#define __ARM_SIZEOF_WCHAR_T 32
#define __ATOMIC_ACQUIRE 2
#define __SFRACT_IBIT__ 0
#define __FLT_MIN__ 1.1754943508222875e-38F
#define __UFRACT_MAX__ 0XFFFFP-16UR
#define __UINT_LEAST8_TYPE__ unsigned char
#define __DQ_FBIT__ 63
#define __INTMAX_C(c) c ## LL
#define __ULFRACT_FBIT__ 32
#define __SACCUM_EPSILON__ 0x1P-7HK
#define __CHAR_BIT__ 8
#define __USQ_IBIT__ 0
#define __UINT8_MAX__ 255
#define __ACCUM_FBIT__ 15
#define __WINT_MAX__ 4294967295U
#define __USFRACT_FBIT__ 8
#define __ORDER_LITTLE_ENDIAN__ 1234
#define __SIZE_MAX__ 4294967295U
#define __ARM_ARCH_ISA_ARM 1
#define __WCHAR_MAX__ 4294967295U
#define __LACCUM_IBIT__ 32
#define __DBL_DENORM_MIN__ ((double)4.9406564584124654e-324L)
#define __GCC_ATOMIC_CHAR_LOCK_FREE 1
#define __FLT_EVAL_METHOD__ 0
#define __unix__ 1
#define __LLACCUM_MAX__ 0X7FFFFFFFFFFFFFFFP-31LLK
#define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 1
#define __FRACT_FBIT__ 15
#define __UINT_FAST64_MAX__ 18446744073709551615ULL
#define __SIG_ATOMIC_TYPE__ int
#define __UACCUM_FBIT__ 16
#define __DBL_MIN_10_EXP__ (-307)
#define __FINITE_MATH_ONLY__ 0
#define __ARMEL__ 1
#define __LFRACT_IBIT__ 0
#define __GNUC_PATCHLEVEL__ 2
#define __LFRACT_MAX__ 0X7FFFFFFFP-31LR
#define __UINT_FAST8_MAX__ 255
#define __DEC64_MAX_EXP__ 385
#define __INT8_C(c) c
#define __UINT_LEAST64_MAX__ 18446744073709551615ULL
#define __SA_FBIT__ 15
#define __SHRT_MAX__ 32767
#define __LDBL_MAX__ 1.7976931348623157e+308L
#define __FRACT_MAX__ 0X7FFFP-15R
#define __UFRACT_FBIT__ 16
#define __ARM_FP 12
#define __UFRACT_MIN__ 0.0UR
#define __UINT_LEAST8_MAX__ 255
#define __GCC_ATOMIC_BOOL_LOCK_FREE 1
#define __UINTMAX_TYPE__ long long unsigned int
#define __LLFRACT_EPSILON__ 0x1P-63LLR
#define __linux 1
#define __DEC32_EPSILON__ 1E-6DF
#define __CHAR_UNSIGNED__ 1
#define __UINT32_MAX__ 4294967295U
#define __ULFRACT_MAX__ 0XFFFFFFFFP-32ULR
#define __TA_IBIT__ 64
#define __LDBL_MAX_EXP__ 1024
#define __WINT_MIN__ 0U
#define __linux__ 1
#define __ULLFRACT_MIN__ 0.0ULLR
#define __SCHAR_MAX__ 127
#define __WCHAR_MIN__ 0U
#define __INT64_C(c) c ## LL
#define __DBL_DIG__ 15
#define __ARM_NEON_FP 4
#define __GCC_ATOMIC_POINTER_LOCK_FREE 1
#define __LLACCUM_MIN__ (-0X1P31LLK-0X1P31LLK)
#define __SIZEOF_INT__ 4
#define __SIZEOF_POINTER__ 4
#define __USACCUM_IBIT__ 8
#define __USER_LABEL_PREFIX__
#define __STDC_HOSTED__ 1
#define __LDBL_HAS_INFINITY__ 1
#define __LFRACT_MIN__ (-0.5LR-0.5LR)
#define __HA_IBIT__ 8
#define __TQ_IBIT__ 0
#define __FLT_EPSILON__ 1.1920928955078125e-7F
#define __APCS_32__ 1
#define __USFRACT_IBIT__ 0
#define __LDBL_MIN__ 2.2250738585072014e-308L
#define __FRACT_MIN__ (-0.5R-0.5R)
#define __DEC32_MAX__ 9.999999E96DF
#define __DA_IBIT__ 32
#define __ARM_SIZEOF_MINIMAL_ENUM 4
#define __INT32_MAX__ 2147483647
#define __UQQ_FBIT__ 8
#define __SIZEOF_LONG__ 4
#define __UACCUM_MAX__ 0XFFFFFFFFP-16UK
#define __STDC_IEC_559__ 1
#define __STDC_ISO_10646__ 201103L
#define __UINT16_C(c) c
#define __DECIMAL_DIG__ 17
#define __LFRACT_EPSILON__ 0x1P-31LR
#define __ULFRACT_MIN__ 0.0ULR
#define __gnu_linux__ 1
#define __ARM_PCS_VFP 1
#define __LDBL_HAS_QUIET_NAN__ 1
#define __ULACCUM_IBIT__ 32
#define __UACCUM_EPSILON__ 0x1P-16UK
#define __GNUC__ 4
#define __ULLACCUM_MAX__ 0XFFFFFFFFFFFFFFFFP-32ULLK
#define __HQ_IBIT__ 0
#define __FLT_HAS_DENORM__ 1
#define __SIZEOF_LONG_DOUBLE__ 8
#define __ARM_ARCH_5T__ 1
#define __BIGGEST_ALIGNMENT__ 8
#define __DQ_IBIT__ 0
#define __DBL_MAX__ ((double)1.7976931348623157e+308L)
#define __ULFRACT_IBIT__ 0
#define __INT_FAST32_MAX__ 2147483647
#define __DBL_HAS_INFINITY__ 1
#define __ACCUM_IBIT__ 16
#define __DEC32_MIN_EXP__ (-94)
#define __THUMB_INTERWORK__ 1
#define __LACCUM_MAX__ 0X7FFFFFFFFFFFFFFFP-31LK
#define __INT_FAST16_TYPE__ int
#define __LDBL_HAS_DENORM__ 1
#define __DEC128_MAX__ 9.999999999999999999999999999999999E6144DL
#define __INT_LEAST32_MAX__ 2147483647
#define __DEC32_MIN__ 1E-95DF
#define __ACCUM_MAX__ 0X7FFFFFFFP-15K
#define __DBL_MAX_EXP__ 1024
#define __USACCUM_EPSILON__ 0x1P-8UHK
#define __DEC128_EPSILON__ 1E-33DL
#define __SFRACT_MAX__ 0X7FP-7HR
#define __FRACT_IBIT__ 0
#define __PTRDIFF_MAX__ 2147483647
#define __UACCUM_MIN__ 0.0UK
#define __STDC_NO_THREADS__ 1
#define __UACCUM_IBIT__ 16
#define __LONG_LONG_MAX__ 9223372036854775807LL
#define __SIZEOF_SIZE_T__ 4
#define __ULACCUM_MAX__ 0XFFFFFFFFFFFFFFFFP-32ULK
#define __SIZEOF_WINT_T__ 4
#define __SA_IBIT__ 16
#define __ULLACCUM_MIN__ 0.0ULLK
#define __GXX_ABI_VERSION 1002
#define __UTA_FBIT__ 64
#define __FLT_MIN_EXP__ (-125)
#define __USFRACT_MAX__ 0XFFP-8UHR
#define __UFRACT_IBIT__ 0
#define __INT_FAST64_TYPE__ long long int
#define __DBL_MIN__ ((double)2.2250738585072014e-308L)
#define __LACCUM_MIN__ (-0X1P31LK-0X1P31LK)
#define __ULLACCUM_FBIT__ 32
#define __GXX_TYPEINFO_EQUALITY_INLINE 0
#define __ULLFRACT_EPSILON__ 0x1P-64ULLR
#define __DEC128_MIN__ 1E-6143DL
#define __REGISTER_PREFIX__
#define __UINT16_MAX__ 65535
#define __DBL_HAS_DENORM__ 1
#define __ACCUM_MIN__ (-0X1P15K-0X1P15K)
#define __SQ_IBIT__ 0
#define __UINT8_TYPE__ unsigned char
#define __UHA_FBIT__ 8
#define __NO_INLINE__ 1
#define __SFRACT_MIN__ (-0.5HR-0.5HR)
#define __UTQ_FBIT__ 128
#define __FLT_MANT_DIG__ 24
#define __VERSION__ "4.8.2"
#define __UINT64_C(c) c ## ULL
#define __ULLFRACT_FBIT__ 64
#define __FRACT_EPSILON__ 0x1P-15R
#define __ULACCUM_MIN__ 0.0ULK
#define _STDC_PREDEF_H 1
#define __UDA_FBIT__ 32
#define __LLACCUM_EPSILON__ 0x1P-31LLK
#define __GCC_ATOMIC_INT_LOCK_FREE 1
#define __FLOAT_WORD_ORDER__ __ORDER_LITTLE_ENDIAN__
#define __USFRACT_MIN__ 0.0UHR
#define __UQQ_IBIT__ 0
#define __STDC_IEC_559_COMPLEX__ 1
#define __INT32_C(c) c
#define __DEC64_EPSILON__ 1E-15DD
#define __ORDER_PDP_ENDIAN__ 3412
#define __DEC128_MIN_EXP__ (-6142)
#define __UHQ_FBIT__ 16
#define __LLACCUM_FBIT__ 31
#define __INT_FAST32_TYPE__ int
#define __UINT_LEAST16_TYPE__ short unsigned int
#define unix 1
#define __INT16_MAX__ 32767
#define __SIZE_TYPE__ unsigned int
#define __UINT64_MAX__ 18446744073709551615ULL
#define __UDQ_FBIT__ 64
#define __INT8_TYPE__ signed char
#define __ELF__ 1
#define __ULFRACT_EPSILON__ 0x1P-32ULR
#define __LLFRACT_FBIT__ 63
#define __FLT_RADIX__ 2
#define __INT_LEAST16_TYPE__ short int
#define __LDBL_EPSILON__ 2.2204460492503131e-16L
#define __UINTMAX_C(c) c ## ULL
#define __SACCUM_MAX__ 0X7FFFP-7HK
#define __SIG_ATOMIC_MAX__ 2147483647
#define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 1
#define __VFP_FP__ 1
#define __SIZEOF_PTRDIFF_T__ 4
#define __LACCUM_EPSILON__ 0x1P-31LK
#define __DEC32_SUBNORMAL_MIN__ 0.000001E-95DF
#define __INT_FAST16_MAX__ 2147483647
#define __UINT_FAST32_MAX__ 4294967295U
#define __UINT_LEAST64_TYPE__ long long unsigned int
#define __USACCUM_MAX__ 0XFFFFP-8UHK
#define __SFRACT_EPSILON__ 0x1P-7HR
#define __FLT_HAS_QUIET_NAN__ 1
#define __FLT_MAX_10_EXP__ 38
#define __LONG_MAX__ 2147483647L
#define __DEC128_SUBNORMAL_MIN__ 0.000000000000000000000000000000001E-6143DL
#define __FLT_HAS_INFINITY__ 1
#define __unix 1
#define __USA_FBIT__ 16
#define __UINT_FAST16_TYPE__ unsigned int
#define __DEC64_MAX__ 9.999999999999999E384DD
#define __CHAR16_TYPE__ short unsigned int
#define __PRAGMA_REDEFINE_EXTNAME 1
#define __INT_LEAST16_MAX__ 32767
#define __DEC64_MANT_DIG__ 16
#define __INT64_MAX__ 9223372036854775807LL
#define __UINT_LEAST32_MAX__ 4294967295U
#define __SACCUM_FBIT__ 7
#define __GCC_ATOMIC_LONG_LOCK_FREE 1
#define __INT_LEAST64_TYPE__ long long int
#define __ARM_FEATURE_CLZ 1
#define __INT16_TYPE__ short int
#define __INT_LEAST8_TYPE__ signed char
#define __SQ_FBIT__ 31
#define __DEC32_MAX_EXP__ 97
#define __ARM_ARCH_ISA_THUMB 1
#define __INT_FAST8_MAX__ 127
#define __ARM_ARCH 5
#define __INTPTR_MAX__ 2147483647
#define __QQ_FBIT__ 7
#define linux 1
#define __UTA_IBIT__ 64
#define __LDBL_MANT_DIG__ 53
#define __SFRACT_FBIT__ 7
#define __SACCUM_MIN__ (-0X1P7HK-0X1P7HK)
#define __DBL_HAS_QUIET_NAN__ 1
#define __SIG_ATOMIC_MIN__ (-__SIG_ATOMIC_MAX__ - 1)
#define __INTPTR_TYPE__ int
#define __UINT16_TYPE__ short unsigned int
#define __WCHAR_TYPE__ unsigned int
#define __SIZEOF_FLOAT__ 4
#define __USQ_FBIT__ 32
#define __UINTPTR_MAX__ 4294967295U
#define __DEC64_MIN_EXP__ (-382)
#define __ULLACCUM_IBIT__ 32
#define __INT_FAST64_MAX__ 9223372036854775807LL
#define __GCC_ATOMIC_TEST_AND_SET_TRUEVAL 1
#define __FLT_DIG__ 6
#define __UINT_FAST64_TYPE__ long long unsigned int
#define __INT_MAX__ 2147483647
#define __LACCUM_FBIT__ 31
#define __USACCUM_MIN__ 0.0UHK
#define __UHA_IBIT__ 8
#define __INT64_TYPE__ long long int
#define __FLT_MAX_EXP__ 128
#define __UTQ_IBIT__ 0
#define __DBL_MANT_DIG__ 53
#define __INT_LEAST64_MAX__ 9223372036854775807LL
#define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 1
#define __DEC64_MIN__ 1E-383DD
#define __WINT_TYPE__ unsigned int
#define __UINT_LEAST32_TYPE__ unsigned int
#define __SIZEOF_SHORT__ 2
#define __ULLFRACT_IBIT__ 0
#define __LDBL_MIN_EXP__ (-1021)
#define __arm__ 1
#define __UDA_IBIT__ 32
#define __INT_LEAST8_MAX__ 127
#define __LFRACT_FBIT__ 31
#define __LDBL_MAX_10_EXP__ 308
#define __ATOMIC_RELAXED 0
#define __DBL_EPSILON__ ((double)2.2204460492503131e-16L)
#define __UINT8_C(c) c
#define __INT_LEAST32_TYPE__ int
#define __SIZEOF_WCHAR_T__ 4
#define __UINT64_TYPE__ long long unsigned int
#define __LLFRACT_MAX__ 0X7FFFFFFFFFFFFFFFP-63LLR
#define __TQ_FBIT__ 127
#define __INT_FAST8_TYPE__ signed char
#define __ULLACCUM_EPSILON__ 0x1P-32ULLK
#define __UHQ_IBIT__ 0
#define __LLACCUM_IBIT__ 32
#define __DBL_DECIMAL_DIG__ 17
#define __DEC_EVAL_METHOD__ 2
#define __TA_FBIT__ 63
#define __UDQ_IBIT__ 0
#define __ORDER_BIG_ENDIAN__ 4321
#define __ACCUM_EPSILON__ 0x1P-15K
#define __UINT32_C(c) c ## U
#define __INTMAX_MAX__ 9223372036854775807LL
#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
#define __FLT_DENORM_MIN__ 1.4012984643248171e-45F
#define __LLFRACT_IBIT__ 0
#define __INT8_MAX__ 127
#define __UINT_FAST32_TYPE__ unsigned int
#define __CHAR32_TYPE__ unsigned int
#define __FLT_MAX__ 3.4028234663852886e+38F
#define __USACCUM_FBIT__ 8
#define __INT32_TYPE__ int
#define __SIZEOF_DOUBLE__ 8
#define __FLT_MIN_10_EXP__ (-37)
#define __UFRACT_EPSILON__ 0x1P-16UR
#define __INTMAX_TYPE__ long long int
#define __DEC128_MAX_EXP__ 6145
#define __ATOMIC_CONSUME 1
#define __GNUC_MINOR__ 8
#define __UINTMAX_MAX__ 18446744073709551615ULL
#define __DEC32_MANT_DIG__ 7
#define __HA_FBIT__ 7
#define __DBL_MAX_10_EXP__ 308
#define __LDBL_DENORM_MIN__ 4.9406564584124654e-324L
#define __INT16_C(c) c
#define __STDC__ 1
#define __PTRDIFF_TYPE__ int
#define __LLFRACT_MIN__ (-0.5LLR-0.5LLR)
#define __ATOMIC_SEQ_CST 5
#define __DA_FBIT__ 31
#define __UINT32_TYPE__ unsigned int
#define __UINTPTR_TYPE__ unsigned int
#define __USA_IBIT__ 16
#define __DEC64_SUBNORMAL_MIN__ 0.000000000000001E-383DD
#define __ARM_EABI__ 1
#define __DEC128_MANT_DIG__ 34
#define __LDBL_MIN_10_EXP__ (-307)
#define __SIZEOF_LONG_LONG__ 8
#define __ULACCUM_EPSILON__ 0x1P-32ULK
#define __SACCUM_IBIT__ 8
#define __GCC_ATOMIC_LLONG_LOCK_FREE 1
#define __LDBL_DIG__ 15
#define __FLT_DECIMAL_DIG__ 9
#define __UINT_FAST16_MAX__ 4294967295U
#define __GNUC_GNU_INLINE__ 1
#define __GCC_ATOMIC_SHORT_LOCK_FREE 1
#define __ULLFRACT_MAX__ 0XFFFFFFFFFFFFFFFFP-64ULLR
#define __UINT_FAST8_TYPE__ unsigned char
#define __USFRACT_EPSILON__ 0x1P-8UHR
#define __ULACCUM_FBIT__ 32
#define __QQ_IBIT__ 0
#define __ATOMIC_ACQ_REL 4
#define __ATOMIC_RELEASE 3
mike at ubuntu:~/fsl-community-bsp/build/tmp/sysroots/x86_64-linux/usr/bin/cortexa9hf-vfp-neon-poky-linux-gnueabi$
On Jul 14, 2014, at 2:28 AM, Karel Gardas <karel.gardas at centrum.cz> wrote:
> On 07/12/14 07:27 AM, Michael Jones wrote:
>> Karel,
>>
>> I have failed to figure out how to make this happen:
>>
>> ("target arch", "ArchARM {armISA = ARMv7, armISAExt = [VFPv3,NEON], armABI = HARD}”)
>>
>
> This is result of running ./configure on arm/ubuntu12.04 -- so I don't cross-compile, but rather compile natively. This is still preferred way to be able to run testsuite AFAIK...
>
>> I have added poky to the list of vendors in aclocal.m4 then configured like this:
>>
>> /configure --target=arm-poky-linux-gnueabi --with-gcc=arm-poky-linux-gnueabi-gcc
>>
>> But I end up with ARMv5.
>>
>> I am new to Autotools and the Haskell build system, so I am not sure what controls this. I assume the idea is that the gcc cross-compiler compiles some code that checks for versions when it evaluates stuff like:
>>
>> AC_COMPILE_IFELSE([
>> AC_LANG_PROGRAM(
>> [],
>> [#if defined(__ARM_ARCH_2__) || \
>> defined(__ARM_ARCH_3__) || \
>> defined(__ARM_ARCH_3M__) || \
>> defined(__ARM_ARCH_4__) || \
>> defined(__ARM_ARCH_4T__) || \
>>
>
> You arm-poky-linux-gnueabi-gcc -v tells what? Also
> arm-poky-linux-gnueabi-gcc -dM -E - < /dev/null may tell you something.
>
>> So I then suspect the compiler needs options like -mcpu=cortex-a9 -mfpu=neon to make the proper version defined, so that the code can check the architecture.
>
> It depends on how the compiler is configured. -v will tell you. Mine looks like:
>
> karel at panda:~$ gcc -v
> Using built-in specs.
> COLLECT_GCC=gcc
> COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabi/4.6/lto-wrapper
> Target: arm-linux-gnueabi
> Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.6 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable-objc-gc --enable-multilib --disable-sjlj-exceptions --with-arch=armv7-a --with-float=softfp --with-fpu=vfpv3-d16 --with-mode=thumb --disable-werror --enable-checking=release --build=arm-linux-gnueabi --host=arm-linux-gnueabi --target=arm-linux-gnueabi
> Thread model: posix
> gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
>
>
> Please note --with-arch=armv7-a --with-float=softfp --with-fpu=vfpv3-d16 --with-mode=thumb -- I'm sure you will also be able to build a cross-compiler using those option, so it'll generate ARMv7A code by default, use just half of VFPv3 regs (VFPv3-D16) and generate Thumbs isns by default (not ARM).
>
> Karel
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