[libcxx] r294553 - [libcxx][CMake] Support in-tree libunwind when building as part of runtimes

[Leslie Zhai via cfe-commits]

Hi Asiri,

Did you fix the issue when building libcxx and libcxxabi use LLVM's 
libunwind?

http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20170206/184841.html

I experienced the similar issue:

CMake Error at projects/libcxxabi/src/CMakeLists.txt:163 
(target_link_libraries):
   Target "unwind" of type UTILITY may not be linked into another 
target.  One
   may link only to INTERFACE, OBJECT, STATIC or SHARED libraries, or to
   executables with the ENABLE_EXPORTS property set.


CMake Error at projects/libcxxabi/src/CMakeLists.txt:197 
(target_link_libraries):
   Target "unwind" of type UTILITY may not be linked into another 
target.  One
   may link only to INTERFACE, OBJECT, STATIC or SHARED libraries, or to
   executables with the ENABLE_EXPORTS property set.

...

CMake Error at projects/libcxx/lib/CMakeLists.txt:244 
(target_link_libraries):
   Target "unwind" of type UTILITY may not be linked into another 
target.  One
   may link only to INTERFACE, OBJECT, STATIC or SHARED libraries, or to
   executables with the ENABLE_EXPORTS property set.


CMake Error at projects/libcxx/lib/CMakeLists.txt:268 
(target_link_libraries):
   Target "unwind" of type UTILITY may not be linked into another 
target.  One
   may link only to INTERFACE, OBJECT, STATIC or SHARED libraries, or to
   executables with the ENABLE_EXPORTS property set.

----- 8< -------- 8< -------- 8< -------- 8< -------- 8< -------- 8< ---

My cmake option:

$ cmake .. -DCMAKE_INSTALL_PREFIX=/opt/loong-llvm \
     -DCMAKE_BUILD_TYPE=Release \
     -DLLVM_ENABLE_ASSERTIONS=ON \
     -DCMAKE_C_COMPILER=/opt/loong-llvm/bin/clang \
     -DCMAKE_CXX_COMPILER=/opt/loong-llvm/bin/clang++ \
     -DCMAKE_C_FLAGS="-fPIC" \
     -DCMAKE_CXX_FLAGS="-std=c++11 -fPIC" \
     -DLLVM_BUILD_LLVM_DYLIB=ON \
     -DLLVM_LINK_LLVM_DYLIB=ON \
     -DLLVM_INSTALL_UTILS=ON \
     -DLLVM_ENABLE_RTTI=ON \
     -DLLVM_ENABLE_FFI=ON \
     -DLLVM_ENABLE_EH=ON \
     -DLLVM_BUILD_TESTS=OFF \
     -DLLVM_BUILD_DOCS=OFF \
     -DLLVM_ENABLE_SPHINX=OFF \
     -DLLVM_ENABLE_DOXYGEN=OFF \
     -DLLDB_DISABLE_LIBEDIT=1 \
     -DSPHINX_WARNINGS_AS_ERRORS=OFF \
     -DFFI_INCLUDE_DIR=$(pkg-config --variable=includedir libffi) \
     -DFFI_LIBRARY_DIR:PATH="$(pkg-config --variable=libdir libffi)" \
     -DLLVM_BINUTILS_INCDIR=/usr/include \
     -DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=ON \
     -DLIBUNWIND_ENABLE_SHARED=OFF \
     -DLIBCXXABI_USE_LLVM_UNWINDER=ON \
     -DLLVM_DEFAULT_TARGET_TRIPLE="mips64el-redhat-linux" \
     -DCLANG_VENDOR="Loongson"

Regards,

Leslie Zhai