[package] google-cloud-cpp/1.26.1~1.31.1: Fails to compile for Windows as a DLL.

[hwhsu1231]

Package and Environment Details (include every applicable attribute)

• Package Name/Version: google-cloud-cpp/1.26.1~1.31.1
• Operating System+version: Windows 11
• Compiler+version: MSVC 2019
• Docker image: None
• Conan version: Conan 1.45.0
• Python version: Python 3.9.2

Conan profile (output of conan profile show default)

[settings]
os=Windows
os_build=Windows
arch=x86_64
arch_build=x86_64
build_type=Release
[options]
[conf]
[build_requires]
[env]

Root-level CMakeLists.txt

I use CMake-Conan to install package. Here is my root-level CMakeLists.txt file:

Click to CMakeLists.txt

cmake_minimum_required(VERSION 3.15)
get_filename_component(folder_name "${CMAKE_CURRENT_SOURCE_DIR}" NAME)
project(${folder_name} LANGUAGES C CXX)
message("========== ${folder_name} ==========")


get_cmake_property(is_multi_config GENERATOR_IS_MULTI_CONFIG)
if(is_multi_config)     # Multi-Config Generator
  set(output_dir "${CMAKE_BINARY_DIR}/$<CONFIG>")
else(is_multi_config)   # Single-Config Generator
  set(output_dir "${CMAKE_BINARY_DIR}/${CMAKE_BUILD_TYPE}")
endif(is_multi_config)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${output_dir}/bin")
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${output_dir}/lib")
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${output_dir}/lib")


if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
  add_compile_options("/source-charset:utf-8")
elseif(CMAKE_CXX_COMPILER_DIR MATCHES GNU)
  add_compile_options("-finput-charset=utf-8")
endif()


if(NOT EXISTS "${CMAKE_BINARY_DIR}/conan.cmake")
  message(STATUS "Downloading conan.cmake from https://github.com/conan-io/cmake-conan ...")
  file(DOWNLOAD 
    "https://raw.githubusercontent.com/conan-io/cmake-conan/develop/conan.cmake"
    "${CMAKE_BINARY_DIR}/conan.cmake")
endif()
include("${CMAKE_BINARY_DIR}/conan.cmake")


set(conan_config_generators "CMakeDeps")
set(conan_config_requires   "google-cloud-cpp/1.31.1")
set(conan_config_options    "google-cloud-cpp:shared=True")


if(is_multi_config)     # Multi-Config Generator
  foreach(type Debug;Release)
    conan_cmake_configure(
      GENERATORS  ${conan_config_generators}
      REQUIRES    ${conan_config_requires}
      OPTIONS     ${conan_config_options}
      IMPORTS     "bin, *.dll -> ../${type}/bin")
    conan_cmake_autodetect(settings BUILD_TYPE ${type})
    conan_cmake_install(
      PATH_OR_REFERENCE "."
      INSTALL_FOLDER    "./conan"
      BUILD             missing
      REMOTE            conancenter
      SETTINGS          ${settings})
  endforeach()
else(is_multi_config)   # Single-Config Generator
  set(type ${CMAKE_BUILD_TYPE})
  conan_cmake_configure(
    GENERATORS  ${conan_config_generators}
    REQUIRES    ${conan_config_requires}
    OPTIONS     ${conan_config_options}
    IMPORTS     "bin, *.dll -> ../${type}/bin")
  conan_cmake_autodetect(settings)
  conan_cmake_install(
    PATH_OR_REFERENCE "."
    INSTALL_FOLDER    "./conan"
    BUILD             missing
    REMOTE            conancenter
    SETTINGS          ${settings})
endif(is_multi_config)


list(APPEND CMAKE_MODULE_PATH "${CMAKE_BINARY_DIR}/conan")
list(APPEND CMAKE_PREFIX_PATH "${CMAKE_BINARY_DIR}/conan")

Steps to reproduce

1. Use VSCode to open a empty folder.
2. Download CMake-Tools plugin from Extension.
3. Create an empty CMakeLists.txt file, and then paste the above example on it.
4. Press Ctrl+Shift+P, and then type CMake: Configure.

Logs

Click to expand log

[cmake] ========== CMakeDeps-google-cloud-cpp ==========
[cmake] -- Downloading conan.cmake from https://github.com/conan-io/cmake-conan ...
[cmake] -- Conan: Detected VS runtime: MDd
[cmake] -- Conan: checking conan executable
[cmake] -- Conan: Found program C:/Program Files/Conan/conan/conan.exe
[cmake] -- Conan: Version found Conan version 1.45.0
[cmake] -- Conan executing: C:/Program Files/Conan/conan/conan.exe install . --remote conancenter --install-folder ./conan --build missing --settings arch=x86_64 --settings build_type=Debug --settings compiler=Visual Studio --settings compiler.version=16 --settings compiler.runtime=MDd
[cmake] Configuration:
[cmake] [settings]
[cmake] arch=x86_64
[cmake] arch_build=x86_64
[cmake] build_type=Debug
[cmake] compiler=Visual Studio
[cmake] compiler.runtime=MDd
[cmake] compiler.version=16
[cmake] os=Windows
[cmake] os_build=Windows
[cmake] [options]
[cmake] [build_requires]
[cmake] [env]
[cmake] 
[cmake] conanfile.txt: Installing package
[cmake] Requirements
[cmake]     abseil/20211102.0 from 'conancenter' - Cache
[cmake]     c-ares/1.18.1 from 'conancenter' - Cache
[cmake]     crc32c/1.1.1 from 'conancenter' - Cache
[cmake]     google-cloud-cpp/1.31.1 from 'conancenter' - Cache
[cmake]     grpc/1.39.1 from 'conancenter' - Cache
[cmake]     libcurl/7.78.0 from 'conancenter' - Cache
[cmake]     nlohmann_json/3.10.2 from 'conancenter' - Cache
[cmake]     openssl/1.1.1m from 'conancenter' - Cache
[cmake]     protobuf/3.19.2 from 'conancenter' - Cache
[cmake]     re2/20220201 from 'conancenter' - Cache
[cmake]     zlib/1.2.12 from 'conancenter' - Cache
[cmake] Packages
[cmake]     abseil/20211102.0:d057732059ea44a47760900cb5e4855d2bea8714 - Download
[cmake]     c-ares/1.18.1:54ec61be929ade75cf5113f97d6455a256d5f310 - Download
[cmake]     crc32c/1.1.1:d057732059ea44a47760900cb5e4855d2bea8714 - Download
[cmake]     google-cloud-cpp/1.31.1:INVALID - Invalid
[cmake]     grpc/1.39.1:f74385263b5bfcb37c7fad3135e62a358f333f93 - Download
[cmake]     libcurl/7.78.0:e6b1d1798581c401d12ccd0480c8dbc037628902 - Download
[cmake]     nlohmann_json/3.10.2:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 - Download
[cmake]     openssl/1.1.1m:d057732059ea44a47760900cb5e4855d2bea8714 - Download
[cmake]     protobuf/3.19.2:390b80578bf6c7353bb1fcd9b8fe1b4987dc6ea1 - Download
[cmake]     re2/20220201:d057732059ea44a47760900cb5e4855d2bea8714 - Download
[cmake]     zlib/1.2.12:d057732059ea44a47760900cb5e4855d2bea8714 - Download
[cmake] 
[cmake] Installing (downloading, building) binaries...
[cmake] WARN: grpc/1.39.1: requirement openssl/1.1.1n overridden by google-cloud-cpp/1.31.1 to openssl/1.1.1m 
[cmake] WARN: libcurl/7.78.0: requirement openssl/1.1.1n overridden by google-cloud-cpp/1.31.1 to openssl/1.1.1m 
[cmake] ERROR: There are invalid packages (packages that cannot exist for this configuration):
[cmake] google-cloud-cpp/1.31.1: Invalid ID: Fails to compile for Windows as a DLL
[cmake] CMake Error at build/win32-MSVC-x64-Debug/conan.cmake:651 (message):
[cmake]   Conan install failed='6'
[cmake] Call Stack (most recent call first):
[cmake]   CMakeLists.txt:64 (conan_cmake_install)
[cmake] 
[cmake] 
[cmake] -- Configuring incomplete, errors occurred!

[hwhsu1231]

By the way, I deleted all the source and binary packages inside their directories:

• Binary Package: C:\.conan
• Source Package: %USERPROFILE%\.conan\data

But it still doesn't work.

[SpaceIm]

What is the issue? google-cloud-cpp as shared is not supported with VIsual Studio.

[hwhsu1231]

As the log shows:

[cmake] WARN: grpc/1.39.1: requirement openssl/1.1.1n overridden by google-cloud-cpp/1.31.1 to openssl/1.1.1m 
[cmake] WARN: libcurl/7.78.0: requirement openssl/1.1.1n overridden by google-cloud-cpp/1.31.1 to openssl/1.1.1m 
[cmake] ERROR: There are invalid packages (packages that cannot exist for this configuration):
[cmake] google-cloud-cpp/1.31.1: Invalid ID: Fails to compile for Windows as a DLL

It fails to install the "google-cloud-cpp" package.

[SpaceIm]

You have google-cloud-cpp:shared=True, but google-cloud-cpp shared is not supported with Visual Studio, so the recipe reports this invalid configuration, there is no issue.

[hwhsu1231]

Why does google-cloud-cpp not support :shared=True option with Visual Studio, specifically? Is it normal?

[SpaceIm]

It's a google-cloud-cpp issue, not a recipe issue: https://github.com/googleapis/google-cloud-cpp/blob/main/doc/packaging.md#common-configuration-variables-for-cmake

By default, CMake compiles the google-cloud-cpp as static libraries. The standard -DBUILD_SHARED_LIBS=ON option can be used to switch this to shared libraries. Having said this, on Windows there are googleapis/google-cloud-cpp#5849 with DLLs and generated protos.

[jgsogo]

As said in previous comments, it is not an error/bug. The recipe is managing this configuration and reporting that the package cannot exist for that configuration.

ERROR: There are invalid packages (packages that cannot exist for this configuration):
google-cloud-cpp/1.31.1: Invalid ID: Fails to compile for Windows as a DLL

This is one of the value propositions of Conan: to inform the user about invalid builds in advance, no need to wait for actual compiler/linker to report a long and unintelligible error.

Closing this issue, please read previous comments for more information from GCP itself about known issues related to that configuration.

Thanks!