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Re: [avr-gcc-list] Meaning of "relocation truncated to fit:R_AVR_13_PCRE
Re: [avr-gcc-list] Meaning of "relocation truncated to fit:R_AVR_13_PCREL"?
Wed, 25 Feb 2009 14:56:24 -0700
Bob, I have run into the same problem and am standing by for the fix.
I can offer a couple ugly tricks that might keep you going for a few
days until the fix is available.
The specific problem you hit might be fixed by forcing -lc and -lm
into the link command stream early on, in order to force 'exit()' to
be linked before it is so far away that it triggers the bug. I have
also found that by jiggling the load order of the .o files I can
prevent many of these.
The result is a makefile that ends up looking like hamburger but it
gets the job done:
$(COMPILE) -o main.elf usbdrv/usbdrvasm.o main.o \
bitlash.o -lc -lm \
bitlash-functions.o -lc -lm \
bitlash-error.o -lc -lm \
You may also find it useful in the interim to turn off working stuff
to make other stuff linkable to debug. My Bitlash build is near 8000
bytes so you can get quite a distance by fiddling like this.
Meanwhile we wait in hope.
Let us all cross our fingers and hope that Murphy smiles on the
maintainers for long enough that the release is expeditious and
On Feb 25, 2009, at 12:57 PM, Weddington, Eric wrote:
org] On Behalf Of Bob Paddock
Sent: Wednesday, February 25, 2009 12:41 PM
Subject: [avr-gcc-list] Meaning of "relocation truncated to
What does this error mean?:
relocation truncated to fit: R_AVR_13_PCREL against symbol `exit'
defined in .fini9 section in g:/winavr~4/bin/../lib/gcc/avr/4.3.2 \
make: *** [LT_A.elf] Error 1
make: *** [all] Error 2
There is no 'exit' in my code; _exit() exits from Main, have not
Seems code size related.
4420 bytes fit before the error triggers.
Yeah, it took me a while to figure this one out, but I finally did
recently. FYI, you also ran into a bug that has now been fixed, but
not yet released.
The R_AVR_13_PCREL relocation is typically where a rjmp/rcall is not
working due to total code size. The "13_PCREL" part means a 13-bit
relative to PC. RJMP/RCALL can address +/- 2K words, hence 8K bytes
total range and 2^13 = 8K.
You're using tiny88 which is avr25 architecture. There was a bug
recently in binutils, where it wasn't probably doing the wraparound
for this relocation because the avr25 arch was forgotten to be added
to a list. This is fixed now and will be in the next WinAVR release.
I'm trying to get a WinAVR RC out this week. We should see if that
helps your situation.
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