On Thu, Feb 29, 2024 at 07:03:35AM +0000, Paz Offer wrote: > Hi, > > I am trying to build my code with QEMU and getting compilation error > according to the ISO C90 standard: > > const size_t buf_size = 31; > char buffer[buf_size + 1]; > > error: ISO C90 forbids array ‘buffer’ whose size can’t be evaluated > [-Werror=vla] > > I noticed that the code builds with '-std=gnu11', which is newer then > C90, so this is not clear to me why I get this error. > Where is the correct place to specify the language version for this?
QEMU has set compiler flags to explicitly /forbid/ use of variable sized arrays on the stack, as it is a known dangerous language feature. You must refactor your changes to avoid this by using either a statically sized array, or allocating on the heap. With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
