I have battled this problem a couple times and so I am documenting the issue and solution here.
Here is the error message from make modules_install
ln: target '+/source': No such file or directoryIn the software development world, we call it technical debt.
In the Army it was “Half-assed, full-blast. Don’t know where we are going but we should have been there yesterday.”
To find out what line a particular stack trace entry points to, use the script ./scripts/faddr2line for example If I have the line __get_vm_area_node+0x17c/0x1a8 I can run
./scripts/faddr2line vmlinux.o __get_vm_area_node+0x17c/0x1a8
__get_vm_area_node+0x17c/0x1a8:
__get_vm_area_node at /root/linux/mm/vmalloc.c:2579 (discriminator 1)Sometimes you don’t get to use a debugger. When I do bare metal development, often it is faster to get to the root of a problem by throwing in trace statements, and seeing what path is taken through the code.
Continue readingAccording to the puzzles coder, any puzzle can be solved in 3 clicks (or less). That means that following my algorithm is likely to be significantly less efficient than an optimum solve.
I am not sure I buy it…yet.
Lets see if we can optimize a solve path for a puzzle.
My Friend Evan Barr coded up a puzzle he had read about in a Mensa magazine. I suggest you click around on it a bit before reading on.