[cfe-dev] setting LLVM_TARGETS_TO_BUILD breaks when building clang shared library

[Tom Stellard via cfe-dev]

On 08/14/2019 10:37 AM, Jerry Scharf via cfe-dev wrote:
> Hi,
> 
> I am building clang 8.0.1 from source and tried using -DLLVM_TARGETS_TO_BUILD="X86" as part of the cmake input along with shared libraries. LLVM builds fine, the clang executable builds fine but the clang .so fails, saying all the other arch entry points are missing. As soon as I change X86 to all for both llvm and clang, it works fine. I am bootstrapping with gcc9/ld first.
> Is this something I am doing wrong or is there a build bug?
> 

Can you file a bug for this and cc me.

-Tom

> cmake command for llvm:
> 
> LD_LIBRARY_PATH="/usr/local/compilers/gcc9/lib64" cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Relea
> se -DCMAKE_C_COMPILER=/usr/local/compilers/gcc9/bin/gcc -DCMAKE_CXX_COMPILER=/usr/local/compilers/gc
> c9/bin/g++ -DCMAKE_INSTALL_PREFIX=/usr/local/compilers/clang8 -DLLVM_TARGETS_TO_BUILD="all" -DLLVM_B
> UILD_LLVM_DYLIB=true -DLLVM_LINK_LLVM_DYLIB=true ../../llvm-8.0.1.src
> 
> clang:
> 
> LD_LIBRARY_PATH="/usr/local/compilers/gcc9/lib64" cmake -G "Unix Makefiles" -D
> CMAKE_BUILD_TYPE=Release -DCMAKE_C_COMPILER=/usr/local/compilers/gcc9/bin/gcc
> -DCMAKE_CXX_COMPILER=/usr/local/compilers/gcc9/bin/g++ -DCMAKE_INSTALL_PREFIX=
> /usr/local/compilers/clang8 -DLLVM_TARGETS_TO_BUILD="all" -DLLVM_BUILD_LLVM_DY
> LIB=true -DLLVM_LINK_LLVM_DYLIB=true -DCMAKE_C_FLAGS="-L/usr/local/compilers/c
> lang8/lib" -DCMAKE_CXX_FLAGS="-L/usr/local/compilers/clang8/lib" ../../cfe-8.0
> .1.src
> 
> thanks,
> 
> jerry
> 
> 
> 
> 
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