Subject:
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Re: Linking failure when 'making' an lx file
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Mon, 28 Aug 2000 23:04:12 GMT
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Viewed:
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1084 times
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In lugnet.robotics.rcx.legos, Colin Ryan writes:
> /usr/local/crossgcc/h8300-hitachi-hms/bin/h8300-hitachi-hms-ld -T
> ../boot/legOS.lds -relax -L/home/ryancd/legOS/lib nanOrb.o -lc -lmint -lfloat
> -lc++ -o nanOrb.ds1 -Ttext 0xb000
> nanOrb.o(.text+0xcc):nanOrb.c: undefined reference to `___ucmpsi2'
> nanOrb.o(.text+0xcc):nanOrb.c: undefined reference to `___ucmpsi2'
> make: *** [nanOrb.ds1] Error 1
Sorry about the extra stuff, the linking problem was due to the compiler
trying to find the above link "___ucmpsi2". When I used h8300-hitachi-hms-nm
I could see all the methods and links in my code, and this was the only strange
looking one. I tracked it down to a single line of code that was along the
lines of ;
if(unsigned_long_var1 - unsigned_long_var2) > sizeof(unsigned char)) .....
By evaluating both sides of the '>' seperatly and assigning the results to
variables, before testing the '>' between these two variables, the problem
miraculously disappeared .....strange I know ...
i.e
unsigned long foo = (unsigned_long_var1 - unsigned_long_var2);
unsigned long foo2 = sizeof(unsigned char);
if(foo > foo2) ...
Does this mean that the compiler is failing whilst trying to optimise the
code ? I'm still very new to C/C++ so I'd appreciate any information or
possible explanation of this .....still learning ;-)
Colin
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Message has 1 Reply:
 | | Re: Linking failure when 'making' an lx file
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| (...) Syntax error: you are missing a parenthesis at the start, right after the if. But gcc should give a fat error at the ">" sign I believe. if( COND ) STATEMENT; if( (ul_var1 - ul_var2) > sizeof(uchar)) STATEMENT; (...) It is miraculous that the (...) (23 years ago, 25-Mar-01, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | Linking failure when 'making' an lx file
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| Hi Can anyone tell me why I'm getting a linking failure when trying to compile my C code, in the standard way. The linker is failing to find a fucntion I have defined in my source: /usr/local/crossgcc/...chi-hms-ld -T ../boot/legOS.lds -relax (...) (24 years ago, 28-Aug-00, to lugnet.robotics.rcx.legos)
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