[CMake] Troubles compiling llvm

[Steven Truppe]

Hi everyone,

i'm trying to compile llvm with ExternalProject_Add and get the
following error:

-- Installing: /usr/lib/ocaml/llvm/llvm.mli
CMake Error at bindings/ocaml/llvm/cmake_install.cmake:49 (file):
   file INSTALL cannot copy file
"/home/stuv/linux-projects/programming/bsEdit/build_files/Release/llvm/src/external_llvm-build/bindings/ocaml/llvm/llvm.mli"
   to "/usr/lib/ocaml/llvm/llvm.mli".
Call Stack (most recent call first):
   bindings/ocaml/cmake_install.cmake:42 (include)
   cmake_install.cmake:64 (include)


Makefile:128: die Regel für Ziel „install“ scheiterte
make[3]: *** [install] Fehler 1
CMakeFiles/external_llvm.dir/build.make:73: die Regel für Ziel
„../build_files/Release/llvm/src/external_llvm-stamp/external_llvm-install“
scheiterte
make[2]: ***
[../build_files/Release/llvm/src/external_llvm-stamp/external_llvm-install]
Fehler 2
CMakeFiles/Makefile2:72: die Regel für Ziel
„CMakeFiles/external_llvm.dir/all“ scheiterte
make[1]: *** [CMakeFiles/external_llvm.dir/all] Fehler 2
Makefile:83: die Regel für Ziel „all“ scheiterte
make: *** [all] Fehler 2

set(LLVM_EXTRA_ARGS
     -DLLVM_USE_CRT_RELEASE=MT
     -DLLVM_USE_CRT_DEBUG=MTd
     -DLLVM_INCLUDE_TESTS=OFF
     -DLLVM_TARGETS_TO_BUILD=X86
     -DLLVM_INCLUDE_EXAMPLES=OFF
     -DLLVM_ENABLE_TERMINFO=OFF
     -DLLVM_BUILD_EXAMPLES=ON
)

set(LLVM_GENERATOR "Unix Makefiles")


ExternalProject_Add(external_llvm
     URL ${LLVM_URL}
     DOWNLOAD_DIR download/llvm
     URL_HASH MD5=${LLVM_HASH}
     CMAKE_GENERATOR ${LLVM_GENERATOR}
     PREFIX ${OUTPUT_PATH}/llvm
     CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${OUTPUT_PATH}/llvm
${DEFAULT_CMAKE_FLAGS} ${LLVM_EXTRA_ARGS}
     INSTALL_DIR ${OUTPUT_PATH}/llvm
)

I followed the instructions from llvm.org but i still get this error
during installation (the build process works fine but during install i
get this error).


best regards!