https://issues.dlang.org/show_bug.cgi?id=23631
--- Comment #3 from Iain Buclaw <[email protected]> --- (In reply to Walter Bright from comment #2) > ImportC does not has builtin, and those macros are predefined by cpp. > Therefore, cpp is run with -Wno-builtin-macro-redefined. > > Perhaps you are building with an earlier dmd? That -W switch was added to > dmd's call to cpp very recently. No, you are not seeing this because you're building with an outdated toolcahin. I'm building master, everything is broken since https://github.com/dlang/dmd/pull/14801 CI is also broken when updating to latest toolchain, so I've had to revert it here: https://github.com/dlang/dmd/pull/14824 --
