Below is difference of gcc internal definitions of 64 multilib toolchain
with -m32 switch and without it:
--- m32.txt 2012-12-24 09:46:13 +0400
+++ m64.txt 2012-12-24 09:44:19 +0400
@@ -7,9 +7,10 @@
#define __INTMAX_C(c) c ## LL
#define __CHAR_BIT__ 8
#define __UINT8_MAX__ 255
+#define _WIN64 1
#define __WINT_MAX__ 65535
#define __ORDER_LITTLE_ENDIAN__ 1234
-#define __SIZE_MAX__ 4294967295U
+#define __SIZE_MAX__ 18446744073709551615ULL
#define __WCHAR_MAX__ 65535
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
@@ -17,8 +18,9 @@
#define __DBL_DENORM_MIN__ ((double)4.94065645841246544177e-324L)
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 1
#define __GCC_ATOMIC_CHAR_LOCK_FREE 2
-#define __FLT_EVAL_METHOD__ 2
+#define __FLT_EVAL_METHOD__ 0
#define __GCC_ATOMIC_CHAR32_T_LOCK_FREE 2
+#define __x86_64 1
#define __UINT_FAST64_MAX__ 18446744073709551615ULL
#define __SIG_ATOMIC_TYPE__ int
#define __DBL_MIN_10_EXP__ (-307)
@@ -44,11 +46,12 @@
#define __DBL_DIG__ 15
#define __GCC_ATOMIC_POINTER_LOCK_FREE 2
#define __SIZEOF_INT__ 4
-#define __SIZEOF_POINTER__ 4
-#define __USER_LABEL_PREFIX__ _
+#define __SIZEOF_POINTER__ 8
+#define __USER_LABEL_PREFIX__
#define __STDC_HOSTED__ 1
#define __WIN32 1
#define __LDBL_HAS_INFINITY__ 1
+#define __WIN64 1
#define __FLT_EPSILON__ 1.19209289550781250000e-7F
#define __LDBL_MIN__ 3.36210314311209350626e-4932L
#define __DEC32_MAX__ 9.999999E96DF
@@ -63,7 +66,7 @@
#define _cdecl __attribute__((__cdecl__))
#define __MMX__ 1
#define __FLT_HAS_DENORM__ 1
-#define __SIZEOF_LONG_DOUBLE__ 12
+#define __SIZEOF_LONG_DOUBLE__ 16
#define __BIGGEST_ALIGNMENT__ 16
#define __DBL_MAX__ ((double)1.79769313486231570815e+308L)
#define _thiscall __attribute__((__thiscall__))
@@ -81,10 +84,12 @@
#define __DEC32_MIN__ 1E-95DF
#define __DBL_MAX_EXP__ 1024
#define __DEC128_EPSILON__ 1E-33DL
+#define __SSE2_MATH__ 1
#define __WIN32__ 1
-#define __PTRDIFF_MAX__ 2147483647
+#define __PTRDIFF_MAX__ 9223372036854775807LL
+#define __amd64 1
#define __LONG_LONG_MAX__ 9223372036854775807LL
-#define __SIZEOF_SIZE_T__ 4
+#define __SIZEOF_SIZE_T__ 8
#define __SIZEOF_WINT_T__ 2
#define __GXX_ABI_VERSION 1002
#define __FLT_MIN_EXP__ (-125)
@@ -99,12 +104,10 @@
#define __cdecl __attribute__((__cdecl__))
#define __UINT8_TYPE__ unsigned char
#define __NO_INLINE__ 1
-#define __i386 1
#define __FLT_MANT_DIG__ 24
#define __VERSION__ "4.7.2"
#define __UINT64_C(c) c ## ULL
#define __GCC_ATOMIC_INT_LOCK_FREE 2
-#define _X86_ 1
#define __FLOAT_WORD_ORDER__ __ORDER_LITTLE_ENDIAN__
#define __INT32_C(c) c
#define __DEC64_EPSILON__ 1E-15DD
@@ -113,18 +116,20 @@
#define __INT_FAST32_TYPE__ int
#define __UINT_LEAST16_TYPE__ short unsigned int
#define __INT16_MAX__ 32767
-#define __i386__ 1
-#define __SIZE_TYPE__ unsigned int
+#define __SIZE_TYPE__ long long unsigned int
#define __UINT64_MAX__ 18446744073709551615ULL
#define __INT8_TYPE__ signed char
#define __FLT_RADIX__ 2
#define __INT_LEAST16_TYPE__ short int
#define __LDBL_EPSILON__ 1.08420217248550443401e-19L
#define __UINTMAX_C(c) c ## ULL
+#define __SSE_MATH__ 1
#define __k8 1
+#define __SEH__ 1
#define __SIG_ATOMIC_MAX__ 2147483647
#define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
-#define __SIZEOF_PTRDIFF_T__ 4
+#define __SIZEOF_PTRDIFF_T__ 8
+#define __x86_64__ 1
#define __DEC32_SUBNORMAL_MIN__ 0.000001E-95DF
#define __MSVCRT__ 1
#define __INT_FAST16_MAX__ 32767
@@ -149,7 +154,7 @@
#define __INT_LEAST8_TYPE__ signed char
#define __DEC32_MAX_EXP__ 97
#define __INT_FAST8_MAX__ 127
-#define __INTPTR_MAX__ 2147483647
+#define __INTPTR_MAX__ 9223372036854775807LL
#define __GXX_MERGED_TYPEINFO_NAMES 0
#define __stdcall __attribute__((__stdcall__))
#define __SSE2__ 1
@@ -157,20 +162,24 @@
#define __DBL_HAS_QUIET_NAN__ 1
#define __SIG_ATOMIC_MIN__ (-__SIG_ATOMIC_MAX__ - 1)
#define __k8__ 1
-#define __INTPTR_TYPE__ int
+#define __INTPTR_TYPE__ long long int
#define __UINT16_TYPE__ short unsigned int
#define __WCHAR_TYPE__ short unsigned int
#define __SIZEOF_FLOAT__ 4
-#define __UINTPTR_MAX__ 4294967295U
+#define __pic__ 1
+#define __UINTPTR_MAX__ 18446744073709551615ULL
#define __DEC64_MIN_EXP__ (-382)
#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 __amd64__ 1
#define WIN32 1
#define __INT64_TYPE__ long long int
#define __FLT_MAX_EXP__ 128
+#define WIN64 1
+#define __ORDER_BIG_ENDIAN__ 4321
#define __DBL_MANT_DIG__ 53
#define __INT_LEAST64_MAX__ 9223372036854775807LL
#define __GCC_ATOMIC_CHAR16_T_LOCK_FREE 2
@@ -181,6 +190,7 @@
#define __SSE__ 1
#define __LDBL_MIN_EXP__ (-16381)
#define __INT_LEAST8_MAX__ 127
+#define __SIZEOF_INT128__ 16
#define __LDBL_MAX_10_EXP__ 4932
#define __ATOMIC_RELAXED 0
#define __DBL_EPSILON__ ((double)2.22044604925031308085e-16L)
@@ -193,13 +203,14 @@
#define __fastcall __attribute__((__fastcall__))
#define __DBL_DECIMAL_DIG__ 17
#define __DEC_EVAL_METHOD__ 2
-#define __ORDER_BIG_ENDIAN__ 4321
+#define __MINGW64__ 1
#define __UINT32_C(c) c ## U
#define __INTMAX_MAX__ 9223372036854775807LL
#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
#define WINNT 1
#define __FLT_DENORM_MIN__ 1.40129846432481707092e-45F
#define __INT8_MAX__ 127
+#define __PIC__ 1
#define __UINT_FAST32_TYPE__ unsigned int
#define __CHAR32_TYPE__ unsigned int
#define __FLT_MAX__ 3.40282346638528859812e+38F
@@ -207,7 +218,6 @@
#define __SIZEOF_DOUBLE__ 8
#define __FLT_MIN_10_EXP__ (-37)
#define __INTMAX_TYPE__ long long int
-#define i386 1
#define _INTEGRAL_MAX_BITS 64
#define __DEC128_MAX_EXP__ 6145
#define __ATOMIC_CONSUME 1
@@ -218,10 +228,10 @@
#define __LDBL_DENORM_MIN__ 3.64519953188247460253e-4951L
#define __INT16_C(c) c
#define __STDC__ 1
-#define __PTRDIFF_TYPE__ int
+#define __PTRDIFF_TYPE__ long long int
#define __ATOMIC_SEQ_CST 5
#define __UINT32_TYPE__ unsigned int
-#define __UINTPTR_TYPE__ unsigned int
+#define __UINTPTR_TYPE__ long long unsigned int
#define __DEC64_SUBNORMAL_MIN__ 0.000000000000001E-383DD
#define __DEC128_MANT_DIG__ 34
#define __LDBL_MIN_10_EXP__ (-4931)
@@ -233,6 +243,7 @@
#define __GNUC_GNU_INLINE__ 1
#define __GCC_ATOMIC_SHORT_LOCK_FREE 2
#define __UINT_FAST8_TYPE__ unsigned char
+#define __WIN64__ 1
#define __ATOMIC_ACQ_REL 4
#define __ATOMIC_RELEASE 3
#define __declspec(x) __attribute__((x))
2012/12/24 Алексей Павлов <alex...@gmail.com>
> Hi!
> This is only resolve a part of error. Error is present in 64-bit multilib
> builds if you try to execute example code with -m32 switch.
>
>
> 2012/12/20 Kai Tietz <ktiet...@googlemail.com>
>
>> 2012/12/20 Ruben Van Boxem <vanboxem.ru...@gmail.com>:
>> > Not to meddle in other people's affairs, but this is probably valuable
>> for
>> > v2 (unless v3 is due very very soon ;-))
>> >
>> > Ruben
>>
>> Back-merged at rev. 5509.
>>
>> Cheers,
>> Kai
>>
>>
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>
>
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