[LLVMdev] Error while linking LLVM files

[Wojciech Daniło]

In the previous mail there was little bug, the code executed by eclipse to
compile the .o file was:

g++ -O0 -g3 -Wall -c -fmessage-length=0 `llvm-config --cppflags --ldflags
--libs core` -MMD -MP -MF"src/test.d" -MT"src/test.d" -o "src/test.o"
"../src/test.cpp"
(which compiles fine)

2012/11/6 Wojciech Daniło <wojtek.danilo.ml at gmail.com>

> Hi!
> I'm trying to learn LLVM and I want to compile the Kaleidoscope compiler.
> according to:
> http://llvm.org/docs/tutorial/LangImpl3.html
>
> I'm compiling it with:
> clang++ -g -O3 test.cpp `llvm-config --cppflags --ldflags --libs core` -o
> toy
>
> and it indeed works.
> The problem is that when using eclipse it forces me to divide the
> compilation into two steps:
>
> g++ -O0 -g3 -Wall -c -fmessage-length=0 `llvm-config --cppflags --ldflags
> --libs core` -MMD -MP -MF"src/lunac.d" -MT"src/lunac.d" -o "src/test.o"
> "../src/test.cpp"
> (which compiles fine)
>
> and:
>
> Invoking: Cross G++ Linker
> g++ `llvm-config --cppflags --ldflags --libs core` -o "test"  ./src/test.o
>
> which gives me error:
> ./src/test.o: In function `NumberExprAST::Codegen()':
> /home/wdanilo/dev/lunac/Debug/../src/test.cpp:358: undefined reference to
> `llvm::APFloat::APFloat(double)'
> /home/wdanilo/dev/lunac/Debug/../src/test.cpp:358: undefined reference to
> `llvm::getGlobalContext()'
> /home/wdanilo/dev/lunac/Debug/../src/test.cpp:358: undefined reference to
> `llvm::ConstantFP::get(llvm::LLVMContext&, llvm::APFloat const&)'
> [...]
>
> Why Linker is not working with these flags? How can I fix it?
>
>
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