in cmakelist ,find_package(Yaml-cpp),target_link_libraries(camyaml ${Yaml-cpp_LIBS})erro

[ghost]

ubuntu: after: cd build cmake .. make sudo make install then in cmakelist i write: find_package(Yaml-cpp) target_link_libraries(camyaml ${Yaml-cpp_LIBS}) when i cmake .. my project ,show erro:

By not providing "FindYaml-cpp.cmake" in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by "Yaml-cpp", but CMake did not find one.

Could not find a package configuration file provided by "Yaml-cpp" with any of the following names:

Yaml-cppConfig.cmake
yaml-cpp-config.cmake

Add the installation prefix of "Yaml-cpp" to CMAKE_PREFIX_PATH or set "Yaml-cpp_DIR" to a directory containing one of the above files. If "Yaml-cpp" provides a separate development package or SDK, be sure it has been installed.

how can i solve it?

[keith-bennett-gbg]

~The package name passed to FIND_PACKAGE cmake command is case sensitive. You're trying to find package Yaml-cpp, but it is being exported as yaml-cpp.~

Edit: actually this comment about case sensitivity is incorrect.

[keith-bennett-gbg]

You'll need to figure out why your cmake isn't finding your installed package. On my machine, I'm using Ubuntu 16.04 LTS with cmake built (tagged 3.8.0) and installed to /usr/local/bin/cmake.

When you do sudo cmake install, what is the output? On my machine, it installs (among other things) /usr/local/lib/cmake/yaml-cpp/yaml-cpp-config.cmake. Cmake should look at /usr/local/lib/cmake by default and find that. cmake install should also produce an install_manifest.txt file in the build directory which will tell you what file/directory locations it has touched.

You might also try using FIND_PACKAGE's HINTS or PATHS parameters.

As a stopgap measure (ugly hack), you can change the installation path by doing

cd path/to/yaml-cpp/build
cmake -DCMAKE_INSTALL_PREFIX=~/local/ ../
make
make install

Then in your project, you can do:

cmake -DYaml-cpp_DIR=~/local/lib/cmake/yaml-cpp ../

However, that is obviously not ideal, particularly if you need to install your application for others to use -- now the library is installed into your ${HOME}/local where other users wouldn't be able to use it. On the other hand, if you use cmake's CPack features, you can get around that by installing yaml-cpp with your project.

[liaoqinghai]

My machine is Ubuntu 16.04LTS and install the yaml-cpp by

sudo apt install libyaml-cpp0.5v5 libyaml-cpp-dev

and I can find the cmake file at /usr/lib/x86_64-linux-gnu/cmake/yaml-cpp and use it in CMakeLists.txt like

find_package(  yaml-cpp REQUIRED )
# ${YAML_CPP_INCLUDE_DIR}
# ${YAML_CPP_LIBRARIES}

But got another two problems:

1. We find lib by yam-cpp but cmake variables prefix is YAML_CPP
2. The inlcude dir of most lib I used is xxx__INCLUDE_DIRS

They are not big problem and not affect the lib, but there is no doc about this and we have read the source code of *.cmake files which is not good.