[cfe-dev] Building Clang+LLVM using Clang

[David Chisnall]

Your problem is a missing definition from a system header.  Without knowing what your target OS is, no one will be able to help you...

David

On 29 May 2012, at 09:55, Murat B wrote:

> Hello,
> 
> I built the Clang using gcc and want to build Clang+LLVM using the already built Clang.
> 
> My compilation terminates by outputting following error messages:
> 
> /home/murat/llvm/lib/Support/IsInf.cpp:41:3: error: "Don't know how to get isinf()"
> # error "Don't know how to get isinf()"
>   ^
> /home/murat/llvm/lib/Support/IsInf.cpp:46:30: error: use of undeclared identifier 'isinf'
> int IsInf(float f)  { return isinf(f); }
>                              ^
> /home/murat/llvm/lib/Support/IsInf.cpp:47:30: error: use of undeclared identifier 'isinf'
> int IsInf(double d) { return isinf(d); }
>                              ^
> 3 errors generated.
> make[1]: *** [/home/murat/llvm/build/lib/Support/Release/IsInf.o] Error 1
> make[1]: Leaving directory `/home/murat/llvm/build/lib/Support'
> make: *** [all] Error 1
> 
> It seems the compilation cannot find the standard header files.
> 
> I compile using following flags:
> -I/home/murat/llvm/build/include
> -I/home/murat/llvm/build/lib/Support
> -I/home/murat/llvm/include
> -I/home/murat/llvm/lib/Support
> -DNDEBUG
> -D_GNU_SOURCE
> -D__STDC_CONSTANT_MACROS
> -D__STDC_FORMAT_MACROS
> -D__STDC_LIMIT_MACROS
> -O0
> -fomit-frame-pointer
> -fno-exceptions
> -fPIC
> -Woverloaded-virtual
> -Wcast-qual
> -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcovered-switch-default 
> 
> Can anybody let me know which flags I need to compile Clang+LLVM using Clang and what I do wrong?
> 
> Thanks a lot for your help!
> Murat
> 
> 
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