[llvm-dev] Embedding llvm as a git submodule in Project

[don hinton via llvm-dev]

Hi Timo:

You need to find LLVMConfig.cmake in the binary or install directory tree,
not the source tree.

Although I don't embed clang/llvm, my config might help you figure it --
clang/llvm installed under (could have used build directory) ~/usr :

$ cd /Users/dhinton/projects/cover/build/ && rm -rf * && CC=~/usr/bin/clang
CXX=~/usr/bin/clang++ LLVM_DIR=~/usr/lib/cmake/llvm cmake ../CVRFI/ -GNinja

$ cat ../CVRFI/CMakeLists.txt
cmake_minimum_required(VERSION 2.8)

set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)

# Make Debug the default, pass -DCMAKE_BUILD_TYPE=Release to change this.
if (NOT CMAKE_BUILD_TYPE)
        message ("Setting CMAKE_BUILD_TYPE = Debug")
        set(CMAKE_BUILD_TYPE Debug)
endif()

if(APPLE)
  set(CMAKE_MACOSX_RPATH ON)
  set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -undefined
dynamic_lookup")
  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -undefined
dynamic_lookup")
endif()

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra
-Wno-unused-parameter")

# While just setting LLVM_DIR will make find_package work, you need to
# add it to CMAKE_MODULE_PATH if you want to include AddLLVM, e.g., if
# you want to use add_llvm_loadable_module.
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "$ENV{LLVM_DIR}")
find_package(LLVM REQUIRED CONFIG)
include(AddLLVM)
add_definitions(${LLVM_DEFINITIONS})
include_directories(${LLVM_INCLUDE_DIRS})
link_directories(${LLVM_LIBRARY_DIRS})



On Sun, Oct 9, 2016 at 2:03 PM, Timo Janssen via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi,
>
>
> I am sorry but I really am not good with cmake yet.
>
> I made one mistake I used MODULE instead of CONFIG in find_package.
>
> But even with CONFIG I doesn't work for me.
>
>
> Here my CMakeLists.txt:
>
>
> cmake_minimum_required(VERSION 3.5.1)
> project(SimpleProject)
>
> find_package(LLVM REQUIRED CONFIG PATHS "${CMAKE_CURRENT_SOURCE_DIR}/l
> lvm/cmake$
>
> message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
> message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")
>
> include_directories(${LLVM_INCLUDE_DIRS})
> add_definitions(${LLVM_DEFINITIONS})
>
> add_executable(simple-tool main.cpp)
>
> llvm_map_components_to_libnames(llvm_libs support)
>
> target_link_libraries(simple-tool ${llvm_libs})
>
>
> Here part of the cmake output in terminal:
>
> CMake Error at CMakeLists.txt:4 (find_package):
>   Could not find a package configuration file provided by "LLVM" with any
> of
>   the following names:
>
>     LLVMConfig.cmake
>     llvm-config.cmake
>
>   Add the installation prefix of "LLVM" to CMAKE_PREFIX_PATH or set
>   "LLVM_DIR" to a directory containing one of the above files.  If "LLVM"
>   provides a separate development package or SDK, be sure it has been
>   installed.
>
>
> -- Configuring incomplete, errors occurred!
> See also "/home/timoo/Schreibtisch/build/CMakeFiles/CMakeOutput.log"
>
>
> I added the PATHS to find_package becouse the command must find the files.
>
> In the llvm/cmake/modules dircotry are:
>
> LLVM-Config.cmake (instead of lower case) and
>
> LLVMConfig.cmake.in (.in added at end)
>
>
> So what must I do?
>
>
>
> Am 09.10.2016 um 16:18 schrieb Timo Janssen:
>
>> Hi all.
>>
>>
>> I want to use llvm in my project and I want to make llvm a git submodule
>> in my project.
>>
>> http://llvm.org/docs/CMake.html#embedding-llvm-in-your-project
>>
>> At this in the documentation it claims to describe how to embed llvm into
>> a project. I tried it that way but it doesn't work, because there isn't any
>> findLLVM.cmake in the llvm/cmake/modules directory anymore (i don't know if
>> there was one in the past).
>>
>>
>> Can someone tell me how to do it now.
>>
>>
>> Timo Janssen
>>
>>
> _______________________________________________
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> llvm-dev at lists.llvm.org
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>
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