If you build with "make -j48" a lot, sometimes you see:

gcc -E -DHAVE_CONFIG_H -I. -I..  -Wall -W -DGRUB_UTIL=1 -D_FILE_OFFSET_BITS=64 -I./include -DGRUB_FILE=\"grub_script.tab.h\" -I. -I.. -I. -I.. -I../include -I./include -I../grub-core/lib/libgcrypt-grub/src/  -I../grub-core/lib/minilzo -I../grub-core/lib/xzembed -DMINILZO_HAVE_CONFIG_H -Wall -W -DGRUB_UTIL=1 -D_FILE_OFFSET_BITS=64 -I./include -DGRUB_FILE=\"grub_script.tab.h\" -I. -I.. -I. -I.. -I../include -I./include -I../grub-core/lib/libgcrypt-grub/src/  -I./grub-core/gnulib -I../grub-core/gnulib -I/builddir/build/BUILD/grub-2.02/grub-aarch64-efi-2.02 -D_FILE_OFFSET_BITS=64 \
  -D'GRUB_MOD_INIT(x)=@MARKER@x@' grub_script.tab.h grub_script.yy.h ../grub-core/commands/blocklist.c ../grub-core/commands/macbless.c ../grub-core/commands/xnu_uuid.c ../grub-core/commands/testload.c ../grub-core/commands/ls.c ../grub-core/disk/dmraid_nvidia.c ../grub-core/disk/loopback.c ../grub-core/disk/lvm.c ../grub-core...