sign conversion error prevents build

[VictorEijkhout]

/Users/eijkhout/Installation/sfml/sfml-2.6.0/src/SFML/System/Unix/ClockImpl.cpp: In static member function 'static sf::Time sf::priv::ClockImpl::getCurrentTime()':
/Users/eijkhout/Installation/sfml/sfml-2.6.0/src/SFML/System/Unix/ClockImpl.cpp:50:41: error: conversion to 'sf::Int64' {aka 'long long int'} from 'sf::Uint64' {aka 'long long unsigned int'} may change the sign of the result [-Werror=sign-conversion]
   50 |     return sf::microseconds(nanoseconds / 1000);
      |                             ~~~~~~~~~~~~^~~~~~
cc1plus: all warnings being treated as errors

[ChrisThrasher]

Can you please provide information on your build environment and how someone may go about reproducing this?

As a workaround you can simply disable warnings as errors by setting the cache variable WARNINGS_AS_ERRORS to OFF and the library will build.

[VictorEijkhout]

I was building with gcc 12 on MacOS.

[ChrisThrasher]

GCC fails on macOS for reasons related to Apple system headers. Once you disable WARNINGS_AS_ERRORS you'll probably run into them. Use AppleClang or Clang instead.

[VictorEijkhout]

Ah. Just ran into that indeed. I'll try clang.

[ChrisThrasher]

We'd like to support GCC on macOS but simply don't know how to fix the compilation errors. I'm closing this issue since it seems like the error was limited to that compiler+OS combo.

[ghost]

Why was this closed? It looks like a bug to fix.

[eXpl0it3r]

See also: #2790