multi-arch code fails on mingw 64bits

I have a C/++ codebase that compiles in Windows x86_64 targeting x86 using the mingw32 32-bit shell of the MSYS64 project.

(It also compiles fine on linux x86/x86_64 and android's 4 archs.)

However, if i change to running it in the 64-bit shell, i get this error when compiling:

C:/msys64/mingw64/include/stdlib.h:303:23: error: expected ',' or '...' before numeric constant
  303 |   int __cdecl abs(int _X);
      |                       ^~

the code block being:

#ifndef _CRT_ABS_DEFINED
#define _CRT_ABS_DEFINED
  int __cdecl abs(int _X);
  long __cdecl labs(long _X);
#endif

I believe this file comes from mingw-w64-x86_64-headers-git from the mingw-w64-x86_64-toolchain metapackage.

I find it odd that this would be a MinGW error but what's triggering this on my code is a simple #include <string>.

Among others, my Makefile has -lmingw64, what am i missing?

Following @Lundin's comment i ended up reinstalling msys2/ucrt64 only, in another vm, and try again. Did clear that, but now i hit

C:/msys64/ucrt64/include/c++/14.2.0/limits:2100:30: error: unable to find numeric literal operator 'operator""Q'
 2100 |         return __extension__ 0x1.0p-16382Q;
      |                              ^~~~~~~~~~~~~

the lines being

#ifdef __STRICT_ANSI__
        // 0x1.0p-30 * 0x1.0p-16352
        return double(9.3132257461547852e-10) * _S_1pm16352();
#else
        return __extension__ 0x1.0p-16382Q;
#endif

I've tried with -D__STRICT_ANSI__ but it hits the same line (after a make clean), so somewhere in the includes it's being undefined.

posted 3 months ago

CC BY-SA 4.0

2mo ago

JohnRando‭

87 reputation 4 2 13 5