.o files > 2gb seem to fail on macOS about ccache

[jrosdahl]

Sounds like you're using a ccache built in 32-bit mode? Have you built it yourself or did you get a prebuilt version?

That said, the ccache build system sets _FILE_OFFSET_BITS=64 to be able to handle large files even when built in 32-bit mode. I don't know if that works on macOS or if there is another way to opt-in to 64-bit APIs.

[sandercox]

Sounds like you're using a ccache built in 32-bit mode? Have you built it yourself or did you get a prebuilt version?

That said, the ccache build system sets _FILE_OFFSET_BITS=64 to be able to handle large files even when built in 32-bit mode. I don't know if that works on macOS or if there is another way to opt-in to 64-bit APIs.

Our fleet of computers uses homebrew brew install ccache but I'll give a manual ccache built a try to see if I can get that to properly handle 64bit files.

Thanks for info on where to my investigation.

[sandercox]

Tried a build with a manual compiled ccache

cmake -G Ninja -B build && cmake --build
ln -s "$(pwd)/build/ccache" /usr/local/bin/ccache

But that has the same invalid argument error. THis happens after about 3 minutes compiling the file in question - any pointers on where I should add a breakpoint when running a debugger for this? Happy to dig a bit to get the issue resolved!

[jrosdahl]

@sandercox: I might have fixed this in a251091. Could you try if latest master works better for you?

[sandercox]

@jrosdahl Thank you for fixing this, the latest master works on that version of our code. We've also went ahead and done some work on limiting our object file size to begin with, but thank you for taking the time to fix it.