Dear Kevin,
On 10/25/16 17:21, Kevin O'Connor wrote:
On Sun, Oct 23, 2016 at 08:57:28PM +0200, Paul Menzel wrote:
Date: Sun, 23 Oct 2016 18:56:28 +0200
Debian enables PIE hardening flags by default since package gcc-6 6.2.0-7 [1].
With that change, SeaBIOS fails to build with the error below [2][3].
$ make Build Kconfig config file Compile checking out/src/misc.o Compile checking out/src/stacks.o src/stacks.c: Assembler messages: src/stacks.c:567: Error: found '(', expected: ')' src/stacks.c:567: Error: junk `(%ebp))' after expression src/stacks.c:568: Warning: indirect call without `*' Makefile:133: die Regel für Ziel „out/src/stacks.o“ scheiterte make: *** [out/src/stacks.o] Fehler 1I just built and compiled gcc v6.2.0 and it compiles seabios fine. So, this looks like a debian bug, and I think it should be filed there.
Yes, that’s exactly what I wrote.
Debian decided to enable PIE hardening flags by default in the GCC package.
Passing `no-pic` to the compiler fixes this issue.
I don't see where pic (position independent code) is related. My guess is that it just causes random code changes which then doesn't tickle the underlying issue.
Does adding '-fno-pie' help?
Isn’t that already used due to `COMMONCFLAGS += $(call cc-option,$(CC),-nopie,)` in the `Makefile`?
I’ll try it anyway.
Thanks,
Paul