[LLVMdev] compiling llvm-gcc4 on ubuntu

[Stefan Weigert]

ok thanks a lot. i think the "--enable-llvm=..." command did it for me. in 
fact i have to admit that i got confused because when i started i followed 
the instaructions in README.LLVM step by step. that braught me an error 
somewhere with the problem that "libstdc++.so.6" was searching for GCC4.2.0 
which doesn't exist on my system ("libstdc++.so.6" is of version 4.1.0?!)

then i found the script with which the 1.8 - versions included in the package 
list of ubuntu were built - here i also found the "--disable-shared" switch. 
so i took the configure syntax of the script and ran into the other error. it 
was a bit silly of me not to try to merge both ;)

my suggestion:
add in README.LLVM for the linux-section that in the case one sees the error 
with GCC4.2.0 the switch "--disable-shared" should be added to the configure 
command.


nevertheless thanks a lot for your help!!

On Thursday 01 March 2007 23:49:32 Reid Spencer wrote:
> Hi Stefan,
>
> On Thu, 2007-03-01 at 23:26 +0100, Stefan Weigert wrote:
> > hello,
> >
> > i am new to llvm and can't manage to compile the gcc backend.
>
> Okay. Did you read: http://llvm.org/docs/GettingStartedGuide.html ?
>
> > my steps:
> > i compile the llvm-source first as suggested in "README.LLVM"
> > that works fine and without any issues.
>
> Okay.
>
> > then i make a new dir called build. from there i do the following:
> >
> > stefan at ubuntu:~/programs/llvm/build$ ../llvm-gcc4-1.9.source/configure
> > --enable-languages=c,c++ --prefix=/usr/local/ --disable-shared
>
> A few issues here:
>      1. This looks like the 1.9 version of llvm-gcc. Is your LLVM also
>         the 1.9 version? If not, it definitely won't work (llvm-gcc4 and
>         llvm must stay closely in sync).
>      2. This configure line is not correct for llvm-gcc4. At the very
>         least you need --enable-llvm=/path/to/llvm/build/root. You might
>         also consider --disable-nls if you don't care about national
>         language support (makes build faster). Finally, if you built
>         llvm debug (the default if you checked it out from CVS), then
>         you should also have --enable-checking (to build llvm-gcc debug
>         as well).
>
> > then after some time i get the follwing error:
>
> I think you also did "make"
>
> > make[2]: Entering directory '/home/stefan/programs/llvm/build/gcc'
> > /home/stefan/programs/llvm/build/gcc/xgcc
> > -B/home/stefan/programs/llvm/build/gcc/
> > -B/usr/local//i686-pc-linux-gnu/bin/ -B/usr/local//i686-pc-linux-gnu/lib/
> > -isystem /usr/local//i686-pc-linux-gnu/include -isystem
> > /usr/local//i686-pc-linux-gnu/sys-include -O2  -DIN_GCC    -W -Wall
> > -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes
> > -Wold-style-definition  -isystem ./include  -fPIC -g -DHAVE_GTHR_DEFAULT
> > -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED  -I. -I.
> > -I../../llvm-gcc4-1.9.source/gcc -I../../llvm-gcc4-1.9.source/gcc/.
> > -I../../llvm-gcc4-1.9.source/gcc/../include
> > -I../../llvm-gcc4-1.9.source/gcc/../libcpp/include  -DL_mulvdi3 -c
> > ../../llvm-gcc4-1.9.source/gcc/libgcc2.c -o libgcc/./_mulvdi3.o
> > ../../llvm-gcc4-1.9.source/gcc/libgcc2.c:403: internal compiler error: in
> > prune_unused_types_update_strings, at dwarf2out.c:14372
> > Please submit a full bug report,
> > with preprocessed source if appropriate.
> > See <URL:http://llvm.org/bugs> for instructions.
>
> I'm not sure what this is about. Likely its related to one of the issues
> above.
>
> > make[2]: *** [libgcc/./_mulvdi3.o] Error 1
> > make[2]: Leaving directory '/home/stefan/programs/llvm/build/gcc'
> > make[1]: *** [libgcc.a] Error 2
> > make[1]: Leaving directory '/home/stefan/programs/llvm/build/gcc'
> > make: *** [all-gcc] Error 2
> >
> > if you need more information - just ask me :)
>
> Versions, platform, etc. of everything would help.
>
> Reid.
>
> > thanks a lot for your help.
> > _______________________________________________
> > LLVM Developers mailing list
> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev