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Hi, I have installed llvm and llvm-gfortran on Pentium4 machine using 32-bit Ubuntu, it works fine. I recently installed them on AMD64-Ubuntu 8.04, llvm-gfortran gave me following errors $ llvm-gfortran -Wall hello.f95 -o hellof /home/jli127/LLVM/llvm-gcc/install/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.2.1/../../../../lib64/libgfortran.a(error.o): In function `_gfortrani_gfc_itoa': (.text+0x76): undefined reference to `__umoddi3' /home/jli127/LLVM/llvm-gcc/install/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.2.1/../../../../lib6...

...fine. I recently installed them on AMD64-Ubuntu 8.04, > llvm-gfortran gave me following errors > > $ llvm-gfortran -Wall hello.f95 -o hellof this works here on x86-64 ubuntu 8.10. I took a look in my libgfortran.a and it doesn't reference any of the symbols you mention. > /home/jli127/LLVM/llvm-gcc/install/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.2.1/../../../../lib64/libgfortran.a(error.o): > In function `_gfortrani_gfc_itoa': > (.text+0x76): undefined reference to `__umoddi3' This is a library function for doing 64 bit unsigned rem. On a 64 bit machine you shou...

...of the 'configure'? I want to check whether my OS misses some packages that needed by llvm-gcc. I feel the libgfortran built in my OS may incorrect, due to different configure settings. BTW, I check the libgfortran.a in my system: After make, the new generated libgfortran.a: -rw-r--r-- 1 jli127 jli127 1513500 2008-11-06 19:17 /llvm/llvm-gcc/install/lib64/libgfortran.a -rw-r--r-- 1 jli127 jli127 1513500 2008-11-06 19:16 /llvm/llvm-gcc/obj/x86_64-unknown-linux-gnu/libgfortran/.libs/libgfortran.a It's different to the system original libgfortran.a: -rw-r--r-- 1 root root 1854562 20...