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

[don hinton via llvm-dev]

Sorry my example wasn't helpful.

I did take a quick look at rust -- though I didn't download or try to build
it -- and they seem to allow you to use an installed or prebuilt version in
addition to building it in-tree.  However, even when they build it in-tree,
they build the whole thing -- see mk/llvm.mk.

Good luck...



On Mon, Oct 10, 2016 at 1:33 AM, Timo Janssen via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi Don,
>
>
> thanks, but that isn't completely what I want.
>
> THe way you explain it, I have to first build llvm an install and then
> seperately my project.
>
> But that isn't what I want. I want to build it together as one thing. In
> the Rust Compiler they have llvm as a submodule in src folder. I don't know
> how they do it but they don't use CMake so it won't really help to look it
> up. And I want to only build those llvm libraries I will need for my
> project.
>
> Am 10.10.2016 um 02:10 schrieb don hinton:
>
> 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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>>
>
>
>
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