On Apr 5 09:51, Richard wrote: > > Hello Everyone, > > I recently (two weeks ago or so) upgraded the cygwin installation on > an XP 64 bit (corp edition) box and in getting things running on it > again I've been having various troubles, even though I was VERY > careful to watch for any installation errors - none were noticed. > Normally I don't do development on this box but copy over from other > systems. I had at least one program that was not behaving correctly > - it would apparently hide output sent to stdout among other > mysteries. After fiddling with things I decided to just rebuild on > that box from sources - it's almost all gnu c. (Note that this code > needs to run unchanged on many different platforms.) > > At some point I get to the gcc call to bind together three object > files into an executable - all the object files having just been > built with zero errors - and I get this particular "undefined > reference to `len'" error. Of course I went hunting for the use of > 'len' - which is a pretty absurd effort as a simple grep matches on > coutless noise such as 'filename' or 'strlen', etc. However, a > thorough search revealed no uses of just 'len', yet I don't deny I > could possibly have overlooked it. Even so, this directory was taken > wholesale from a 64 bit system (Win 7) with an older cygwin > installation where the code compiles and runs fine. So somehow I > don't think it's actually in my code but rather a library reference > problem somehow. > > The specific set of error output from make is: > > $ gcc -o ctjc.exe ctjc.o hashc.o sha1.o; > ctjc.o:ctjc.c:(.text+0x2287): undefined reference to `len' > ctjc.o:ctjc.c:(.text+0x2287): relocation truncated to fit: > R_X86_64_PC32 against undefined symbol `len' > /usr/bin/ld: ctjc.o: bad reloc address 0x0 in section `.pdata' > /usr/bin/ld: final link failed: Invalid operation > collect2: error: ld returned 1 exit status > > Any assistance greatly appreciated.
As I outlined in other mail to this list just a couple of days ago, the "relocation truncated to fit" stuff is a red herring. It's just a side-effect of the way addressing and relocation on x86_64 works. The important part of the message is the first one: undefined reference to `len'. That's what you have to look for. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat
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