Question

对于m68k，我们在Debian's testing/build infrastructure下的构建失败：

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修复很简单，但我需要知道预处理器为平台定义的内容。我没有具有该体系结构的计算机，因此我无法使用config.h:29:3: error: #error "IS_LITTLE_ENDIAN is set, but __BYTE_ORDER__ does not equal __ORDER_LITTLE_ENDIAN__" # error "IS_LITTLE_ENDIAN is set, but __BYTE_ORDER__ does not equal __ORDER_LITTLE_ENDIAN__"转储它们。

有人可以提供m68k的预处理器输出吗？

Answer 1

如果您愿意消磨时间，可以为该平台构建交叉编译器。如果您仅关心该特定标志，请尝试将此测试添加到configure.ac：

#include <stdint.h>

enum {
  ENDIAN_UNKNOWN,
  ENDIAN_BIG,
  ENDIAN_LITTLE,
  ENDIAN_BIG_WORD,   /* Middle-endian, Honeywell 316 style */
  ENDIAN_LITTLE_WORD /* Middle-endian, PDP-11 style */
};

int endianness(void)
{
  union
  {
    uint32_t value;
    uint8_t data[sizeof(uint32_t)];
  } number;

  number.data[0] = 0x00;
  number.data[1] = 0x01;
  number.data[2] = 0x02;
  number.data[3] = 0x03;

  switch (number.value)
  {
  case UINT32_C(0x00010203): return ENDIAN_BIG;
  case UINT32_C(0x03020100): return ENDIAN_LITTLE;
  case UINT32_C(0x02030001): return ENDIAN_BIG_WORD;
  case UINT32_C(0x01000302): return ENDIAN_LITTLE_WORD;
  default:                   return ENDIAN_UNKNOWN;
  }
}

预处理器为m68k定义和宏？

1 个答案: