[cfe-dev] How to build a clang-tool out of the build tree?

[Kim Gräsman via cfe-dev]

Glad to hear it helps!

If you look at the history of .travis.yml, you'll find a few 'sed' hacks to
strip missing files of the llvm cmake modules.

Looks like we need to reinstate some of them again.

- Kim

On Sat, Nov 16, 2019, 13:49 Laurent Thévenoux <lrnt at thvnx.com> wrote:

> Hi,
>
>   thanks everyone for you help!
>
> Kim, your solution looks hopeful, unfortunately it seems to not work
> anymore, since it fails on travis with the following message:
>
> ```
> $ cmake -GNinja -DCMAKE_PREFIX_PATH=$ROOT_PATH
> -DCMAKE_C_COMPILER=$BIN_PATH/clang -DCMAKE_CXX_COMPILER=$BIN_PATH/clang++
> -DCMAKE_INSTALL_PREFIX=./ ../
> 295-- IWYU: out-of-tree configuration
> 296-- The C compiler identification is Clang 10.0.0
> 297-- The CXX compiler identification is Clang 10.0.0
> 298-- Check for working C compiler: /usr/lib/llvm-10/bin/clang
> 299-- Check for working C compiler: /usr/lib/llvm-10/bin/clang -- works
> 300-- Detecting C compiler ABI info
> 301-- Detecting C compiler ABI info - done
> 302-- Detecting C compile features
> 303-- Detecting C compile features - done
> 304-- Check for working CXX compiler: /usr/lib/llvm-10/bin/clang++
> 305-- Check for working CXX compiler: /usr/lib/llvm-10/bin/clang++ -- works
> 306-- Detecting CXX compiler ABI info
> 307-- Detecting CXX compiler ABI info - done
> 308-- Detecting CXX compile features
> 309-- Detecting CXX compile features - done
> 316CMake Error at /usr/lib/llvm-10/lib/cmake/llvm/LLVMExports.cmake:1344
> (message):
> 317  The imported target "ExampleIRTransforms" references the file
> 318
> 319     "/usr/lib/llvm-10/lib/libExampleIRTransforms.a"
> 320
> 321  but this file does not exist.  Possible reasons include:
> 322
> 323  * The file was deleted, renamed, or moved to another location.
> 324
> 325  * An install or uninstall procedure did not complete successfully.
> 326
> 327  * The installation package was faulty and contained
> 328
> 329     "/usr/lib/llvm-10/lib/cmake/llvm/LLVMExports.cmake"
> 330
> 331  but not all the files it references.
> 332
> 333Call Stack (most recent call first):
> 334  /usr/lib/llvm-10/cmake/LLVMConfig.cmake:256 (include)
> 335  CMakeLists.txt:15 (find_package)
> 336
> 337
> 338-- Configuring incomplete, errors occurred!
> 339See also
> "/home/travis/build/thvnx/clang-fco/build/CMakeFiles/CMakeOutput.log".
> 340The command "cmake -GNinja -DCMAKE_PREFIX_PATH=$ROOT_PATH
> -DCMAKE_C_COMPILER=$BIN_PATH/clang -DCMAKE_CXX_COMPILER=$BIN_PATH/clang++
> -DCMAKE_INSTALL_PREFIX=./ ../" exited with 1.
> ```
>
> (I’ve double-checked with a clone of your repo) Any idea?
>
> Laurent
>
> > Le 16 nov. 2019 à 11:40, Kim Gräsman <kim.grasman at gmail.com> a écrit :
> >
> > If the straight line tutorials end up not working, you may be able to
> find some inspiration for workarounds in IWYU:
> >
> https://github.com/include-what-you-use/include-what-you-use/blob/master/CMakeLists.txt
> >
> > And:
> >
> https://github.com/include-what-you-use/include-what-you-use/blob/master/.travis.yml
> >
> > - Kim
> >
> > On Wed, Nov 13, 2019, 17:26 Laurent Thévenoux via cfe-dev <
> cfe-dev at lists.llvm.org> wrote:
> > Hi,
> >
> > I’m trying to develop a clang-tool, following such kind of tutorial :
> https://clang.llvm.org/docs/LibASTMatchersTutorial.html.
> >
> > I’m using GitHub with Travis-CI and I can’t build clang/llvm on Travis
> because of the free-plan constraints. I’m wondering if it is possible to
> build such a tool without having to build clang/llvm, i.e., is there a way
> to simply install clang (from any package manager) with its LibTooling and
> LibASTMatchers, to which I could link my tool with?
> >
> > Regards,
> > Laurent
> > _______________________________________________
> > cfe-dev mailing list
> > cfe-dev at lists.llvm.org
> > https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
>
>
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