8000 Predefine __unix__ on POSIX targets · Issue #193 · tyfkda/xcc · GitHub
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Predefine __unix__ on POSIX targets #193

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LekKit opened this issue May 1, 2025 · 1 comment
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Predefine __unix__ on POSIX targets #193

LekKit opened this issue May 1, 2025 · 1 comment

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@LekKit
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LekKit commented May 1, 2025
  • GCC and Clang uniformly predefine __unix__ macro to 1, except on Windows, MacOS and Haiku (And some more obscure systems which are definitely not POSIX compliant)
  • This predefined macro is expected by many portable projects, and may lead to build failures if not fixed (Ignoring the other stuff I stumbled upon, which will be reported separately)

Example output from GCC & Clang on a Linux system:

$ echo | gcc -E -dM -c - | grep __unix__
#define __unix__ 1

$ echo | clang -E -dM -c - | grep __unix__
#define __unix__ 1

^ The following shell syntax may be used to figure out other missing (And well-known and expected) predefined macros
@LekKit LekKit mentioned this issue May 1, 2025
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tyfkda added a commit that referenced this issue May 4, 2025
@tyfkda
Predefine macros
07561cf 
  * C99
  * __unix__
  * __MACH__

#193
#194
@tyfkda
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tyfkda commented May 4, 2025

I have updated the code to define __unix__.

@LekKit LekKit closed this as completed May 4, 2025
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