CMake Warning: CMAKE_EXPORT_COMPILE_COMMANDS not used; compile_commands.json not generated

[andrewzwicky]

Trying to build cquery with fa2fd29, I get the following error, and compile_commands.json is not generated.

>>> cmake --version
cmake version 3.10.3

>>> cmake .. -DCMAKE_INSTALL_PREFIX=release -DCMAKE_EXPORT_COMPILE_COMMANDS=YES -DCMAKE_GENERATOR_PLATFORM=x64
-- Building for: Visual Studio 14 2015
-- The CXX compiler identification is MSVC 19.0.23026.0
-- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe
-- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Using downloaded Clang
-- Downloading Clang 6.0.0 (https://releases.llvm.org/6.0.0/LLVM-6.0.0-win64.exe) ...
-- 7-Zip not found in PATH
-- Downloading 7-Zip 1801 (https://www.7-zip.org/a/7z1801-x64.msi) ...
-- Extracting downloaded 7-Zip ...
-- Extracting downloaded Clang with 7-Zip ...
-- Found Clang: D:/_Repository/cquery/build/LLVM-6.0.0-win64/lib/libclang.lib (found suitable version "6.0.0", minimum required is "6.0.0")
-- Looking for C++ include pthread.h
-- Looking for C++ include pthread.h - not found
-- Found Threads: TRUE
-- Configuring done
-- Generating done
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_COMPILE_COMMANDS


-- Build files have been written to: D:/_Repository/cquery/build

Debug build doesn't make a difference.

>>> cmake .. -DCMAKE_INSTALL_PREFIX=Debug -DCMAKE_EXPORT_COMPILE_COMMANDS=YES -DCMAKE_GENERATOR_PLATFORM=x64
-- Building for: Visual Studio 14 2015
-- The CXX compiler identification is MSVC 19.0.23026.0
-- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe
-- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Using downloaded Clang
-- Downloading Clang 6.0.0 (https://releases.llvm.org/6.0.0/LLVM-6.0.0-win64.exe) ...
-- 7-Zip not found in PATH
-- Downloading 7-Zip 1801 (https://www.7-zip.org/a/7z1801-x64.msi) ...
-- Extracting downloaded 7-Zip ...
-- Extracting downloaded Clang with 7-Zip ...
-- Found Clang: D:/_Repository/cquery/build/LLVM-6.0.0-win64/lib/libclang.lib (found suitable version "6.0.0", minimum required is "6.0.0")
-- Looking for C++ include pthread.h
-- Looking for C++ include pthread.h - not found
-- Found Threads: TRUE
-- Configuring done
-- Generating done
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_COMPILE_COMMANDS


-- Build files have been written to: D:/_Repository/cquery/build

[DaanDeMeyer]

cmake doesn't support generating compile_commands.json for the MSBuild generator. If you want to generate compile_commands.json on Windows you'll have to use the Ninja generator

[jacobdufault]

Which error? I just see the warning. Per above comment closing.

[andrewzwicky]

The error is that the file isn't generated as expected. It's not specified on https://github.com/cquery-project/cquery/wiki/Build-%28CMake%29, which is why I submitted the issue. Seems like that's the expected behavior, so makes sense to close.

I added a small note in the Build (CMAKE) wiki page to point that out.

[jacobdufault]

Thanks for updating the wiki! :)