任何将 'char' 视为 'unsigned' 的编译器? [英] Any compiler which takes 'char' as 'unsigned' ?

问题描述

是否有任何 C 编译器将默认类型的 char 视为无符号，除非用户在文件或项目设置中明确提及?

Is there any C compiler which takes the default type of char as unsigned unless explicitly mentioned by the user in the file or project settings?

/卡努_

推荐答案

GCC 可以.但仅在为约定为 unsigned char 的平台编译时，包括 ARM linux[*].当 GCC 为 x86 编译时，默认为 char 被签名.

GCC does. But only when compiling for platforms where an unsigned char is the convention, including ARM linux[*]. When GCC compiles for x86, the default is for char to be signed.

[*] 或者至少在过去是这样.据我所知，从那以后，Linux 已经在 ARM 上切换到了不同的默认 ABI.

[*] Or at least it has been in the past. For all I know linux has switched to a different default ABI on ARM since.

2013 年更新: 适用于 Android NDK 的 ARM 编译器(gcc、clang)默认为 unsigned char.x86 和 MIPS 编译器默认为 signed char.

Update '2013: ARM compilers (gcc, clang) for Android NDK default to unsigned char. The x86 and MIPS compilers default to signed char.

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