I am trying to install Poco with the help of Conan and Cmake. According to Conan it seems to be able to download Poco, but the setup of the libraries seems to be missing. The final steps gives me either the error that PocoFoundation.lib cannot be found/open, or the error that it cannot find or include 'Poco/..... I have tried searching for the library in my entire system, but it does not seem to exist. I have been following the official Conan guide: Build a simple CMake project using Conan. I am using Windows OS (windows 11) and Visual Studio 2022.
Versions
PS C:\Users\madde\source\repos\Webcrawler> conan --version
Conan version 2.0.13
PS C:\Users\madde\source\repos\Webcrawler> cmake --version
cmake version 3.26.4-msvc4
Files
Conan profile:
[settings]
arch=x86_64
build_type=Release
compiler=msvc
compiler.cppstd=17
compiler.runtime=dynamic
compiler.version=193
os=Windows
CMakeLists.txt
cmake_minimum_required(VERSION 3.15)
project(Webcrawler)
find_package(Poco REQUIRED)
add_executable(${PROJECT_NAME} Webcrawler/Webcrawler.cpp)
target_link_libraries(${PROJECT_NAME} Poco::Poco)
conanfile.txt
[requires]
poco/1.12.4
[generators]
CMakeDeps
CMakeToolchain
Webcrawler\Webcrawler.cpp
#include "Poco/Net/HTTPClientSession.h"
#include "Poco/Net/HTTPRequest.h"
#include "Poco/Net/HTTPResponse.h"
#include "Poco/StreamCopier.h"
#include <iostream>
#include "WebPage.h"
int main()
{
WebPage webpage("192.168.1.1/Index");
webpage.download();
}
Commands to reproduce error
Generating Build folder.
PS C:\Users\madde\source\repos\Webcrawler> conan install . --output-folder=build --build=missing
======== Input profiles ========
Profile host:
[settings]
arch=x86_64
build_type=Release
compiler=msvc
compiler.cppstd=17
compiler.runtime=dynamic
compiler.runtime_type=Release
compiler.version=193
os=Windows
....
....
======== Installing packages ========
bzip2/1.0.8: Already installed! (1 of 11)
expat/2.5.0: Already installed! (2 of 11)
lz4/1.9.4: Already installed! (3 of 11)
sqlite3/3.42.0: Already installed! (4 of 11)
zlib/1.3: Already installed! (5 of 11)
zstd/1.5.5: Already installed! (6 of 11)
libpq/14.9: Already installed! (7 of 11)
pcre2/10.42: Already installed! (8 of 11)
pcre2/10.42: Appending PATH environment variable: C:\Users\madde\.conan2\p\pcre2d85e041fe43c5\p\bin
openssl/3.1.4: Already installed! (9 of 11)
libmysqlclient/8.0.31: Already installed! (10 of 11)
poco/1.12.4: Already installed! (11 of 11)
...¨
...
conanfile.txt: CMakeToolchain generated: CMakePresets.json
conanfile.txt: CMakeToolchain generated: ..\CMakeUserPresets.json
conanfile.txt: Generator 'CMakeDeps' calling 'generate()'
conanfile.txt: Generating aggregated env files
conanfile.txt: Generated aggregated env files: ['conanbuild.bat', 'conanrun.bat']
Install finished successfully
Building the App.
PS C:\Users\madde\source\repos\Webcrawler> cd .\build\
PS C:\Users\madde\source\repos\Webcrawler\build> cmake .. --preset conan-default -DCMAKE_BUILD_TYPE=Release
Preset CMake variables:
CMAKE_POLICY_DEFAULT_CMP0091="NEW"
CMAKE_TOOLCHAIN_FILE:FILEPATH="C:\Users\madde\source\repos\Webcrawler\build\conan_toolchain.cmake"
-- Using Conan toolchain: C:/Users/madde/source/repos/Webcrawler/build/conan_toolchain.cmake
-- Conan toolchain: C++ Standard 17 with extensions OFF
-- Selecting Windows SDK version 10.0.22000.0 to target Windows 10.0.22621.
-- The C compiler identification is MSVC 19.37.32822.0
-- The CXX compiler identification is MSVC 19.37.32822.0
....
....
-- Conan: Component target declared 'Poco::DataMySQL'
-- Conan: Component target declared 'Poco::DataPostgreSQL'
-- Conan: Component target declared 'Poco::DataSQLite'
-- Conan: Component target declared 'Poco::Encodings'
-- Conan: Component target declared 'Poco::JWT'
-- Conan: Component target declared 'Poco::MongoDB'
-- Conan: Component target declared 'Poco::Util'
-- Conan: Component target declared 'Poco::Zip'
-- Conan: Component target declared 'Poco::ActiveRecord'
-- Conan: Component target declared 'Poco::NetSSL'
-- Conan: Target declared 'Poco::Poco'
....
....
-- Conan: Component target declared 'zstd::libzstd_static'
-- Conan: Target declared 'LZ4::lz4_static'
-- Configuring done (5.5s)
-- Generating done (0.1s)
CMake Warning:
Manually-specified variables were not used by the project:
CMAKE_POLICY_DEFAULT_CMP0091
-- Build files have been written to: C:/Users/madde/source/repos/Webcrawler/build
Final step and error
PS C:\Users\madde\source\repos\Webcrawler\build> cmake --build .
MSBuild version 17.7.2+d6990bcfa for .NET Framework
Checking Build System
Building Custom Rule C:/Users/madde/source/repos/Webcrawler/CMakeLists.txt
PWYPWebcrawler.cpp
LINK : fatal error LNK1104: cannot open file 'PocoFoundation.lib' [C:\Users\madde\source\repos\Webcrawler\build\Webcrawler.vcxproj]
In a different build, i got a seperat error:
PS C:\Users\madde\source\repos\Webcrawler\build> cmake --build .
MSBuild version 17.7.2+d6990bcfa for .NET Framework
Checking Build System
Building Custom Rule C:/Users/madde/source/repos/Webcrawler/CMakeLists.txt
Webcrawler.cpp
C:\Users\madde\source\repos\Webcrawler\Webcrawler\Webcrawler.cpp(6,10): fatal error C1083: Cannot open include file: 'Poco/Net/HTTPClien
tSession.h': No such file or directory [C:\Users\madde\source\repos\Webcrawler\build\Webcrawler.vcxproj]
I have seen some posts which indicates that i need to add PocoFoundation.lib in Configuration properties -> Linker -> Input -> Ignore Specific Default Libraries (when using visual studio). I have tried this with no success.
Any help would be appreciated.
It seems you could be mixing commands from Linux/single-config systems with Windows/multi-config systems.
The right commands for Windows-Visual Studio would be:
# Not even need to change folder, if the recipe defined ``cmake_layout``
cmake --preset conan-default
cmake --build --preset conan-release
In short: