Cmake errors when using LLVM 5.0.0 from brew - cmake

I'm trying to use the stock LLVM 5.0.0 provided by Homebrew (MacOS High Sierra 10.13.3). LLVM is installed on my machine under /usr/local/Cellar/llvm/5.0.0/
Now, in my project, I have the following lines in CMakeLists.txt:
# Find the LLVM library
find_package( LLVM 5.0.0 REQUIRED )
include_directories( "${LLVM_INCLUDE_DIRS}" )
link_directories(${LLVM_LIBRARY_DIRS})
message(STATUS "LLVM include dirs: ${LLVM_INCLUDE_DIRS}")
If I run CMake without any parameters, I get:
CMake Error at CMakeLists.txt:74 (find_package):
By not providing "FindLLVM.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "LLVM", but
CMake did not find one.
Could not find a package configuration file provided by "LLVM" (requested
version 5.0.0) with any of the following names:
LLVMConfig.cmake
llvm-config.cmake
Add the installation prefix of "LLVM" to CMAKE_PREFIX_PATH or set
"LLVM_DIR" to a directory containing one of the above files. If "LLVM"
provides a separate development package or SDK, be sure it has been
installed.
It tells me that it couldn't find LLVM. So, I pass the path to the LLVM_DIR, like this:
cmake .. -DLLVM_DIR=/usr/local/Cellar/llvm/5.0.0/share/cmake/modules/
I would expect everything to work. Instead I get the following error:
CMake Error at CMakeLists.txt:74 (find_package):
Could not find a configuration file for package "LLVM" that is compatible
with requested version "5.0.0".
The following configuration files were considered but not accepted:
/usr/local/Cellar/llvm/5.0.0/share/cmake/modules/llvm-config.cmake,
version: unknown
For some reason the version is not present anywhere in the share/cmake/modules directory.
How can I fix this, without changing the brew-installed LLVM?

Found the answer. I was passing a wrong path to LLVM_DIR.
I just have to use another directory (buried in lib, not in share):
cmake .. -DLLVM_DIR=/usr/local/Cellar/llvm/5.0.0/lib/cmake/llvm/
Not sure why brew decided to install 2 versions of CMake helpers for LLVM, one in share and one in lib.

Related

kdev-ruby's CMakeFile.txt requires weird stuff like KF5Config.cmake

I'm trying to compile a Ruby plugin for KDevelop: https://github.com/KDE/kdev-ruby
When I cut a folder called build, cd build, and run cmake .., I get lots of errors:
CMake Error at CMakeLists.txt:13 (include):
include could not find load file:
KDEInstallDirs
CMake Error at CMakeLists.txt:14 (include):
include could not find load file:
KDECMakeSettings
CMake Error at CMakeLists.txt:15 (include):
include could not find load file:
KDECompilerSettings
CMake Error at CMakeLists.txt:16 (include):
include could not find load file:
ECMQtDeclareLoggingCategory
CMake Error at CMakeLists.txt:24 (find_package):
By not providing "FindKF5.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "KF5", but
CMake did not find one.
Could not find a package configuration file provided by "KF5" (requested
version 5.15.0) with any of the following names:
KF5Config.cmake
kf5-config.cmake
Add the installation prefix of "KF5" to CMAKE_PREFIX_PATH or set "KF5_DIR"
to a directory containing one of the above files. If "KF5" provides a
separate development package or SDK, be sure it has been installed.
How, on Ubuntu, do I install something that provides KF5Config.cmake? Preferably without rebuilding KDevelop or KDE or Qt5.
KDevelop relies on the development headers for various libraries, and finds them via the accompanying CMake files.
The build also uses CMake modules provided by the extra-cmake-modules package.
You must install that and libkf5config-dev.
The apt-file command might help you find the relevant packages for your distro in these situations.

Windows 10, VS 2013: Cmake error while configuring OpenCL program

I'm trying to build this Github project in Windows. Getting the error below. I've installed the AMD SDK and added the path to PATH variable. Please let me know how to overcome this issue.
CMake Error at CMakeLists.txt:94 (find_package):
By not providing "FindOpenCL.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "OpenCL", but
CMake did not find one.
Could not find a package configuration file provided by "OpenCL" with any
of the following names:
OpenCLConfig.cmake
opencl-config.cmake
Add the installation prefix of "OpenCL" to CMAKE_PREFIX_PATH or set
"OpenCL_DIR" to a directory containing one of the above files. If "OpenCL"
provides a separate development package or SDK, be sure it has been
installed.
-- Configuring incomplete, errors occurred!
According to docs, CMake provides FindOpenCL.cmake module since version 3.1. So you need at least CMake 3.1 for build given project.
Actually, it is the project's cmake_minimum_required who should provide correct constraint.

Why can't cmake find a package installed using Mac ports?

I installed cxWidgets as follows:
sudo install wxWidgets-3.0
In the cmake file of a project I am trying to build, find_package is called:
find_package(wxWidgets REQUIRED)
However, cmake complains that it can't find the package:
CMake Error at /opt/local/share/cmake-3.4/Modules/FindPackageHandleStandardArgs.cmake:148 (message):
Could NOT find wxWidgets (missing: wxWidgets_LIBRARIES
wxWidgets_INCLUDE_DIRS)
My question is, given that cxWidgets is installed (I have confirmed by running port installed), why can't cmake find it?
The problem is that MacPorts has to support multiple versions of wxWidgets and I have no good idea how to automatically let CMake find the requested version.
You have two options.
The first one is to run sudo port select wxWidgets wxWidgets-3.0. Then CMake should automatically find wxWidgets 3.0.
The second option is to add an additional argument to cmake that depends on the software you are trying to compile.
Usually one of these flags should work:
-DwxWidgets_CONFIG_EXECUTABLE=/opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0/bin/wx-config
-DwxWidgets_wxrc_EXECUTABLE=/opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0/bin/wxrc

"OpenCV" is considered to be NOT FOUND

Linux Flavor: Debian (Crunch Bang)
Problem Occurred: When attempting to build cvblobs with the following command
cd ~/cvblob
cmake .
Error:
CMake Error at cvBlob/CMakeLists.txt:20 (find_package):
Found package configuration file:
/usr/local/share/OpenCV/OpenCVConfig.cmake
but it set OpenCV_FOUND to FALSE so package "OpenCV" is considered to be
NOT FOUND.
-- Configuring incomplete, errors occurred!
Well I met a similar problem when I was going with some other open source face detection modules rather than cvblobs.
Actually you will find that before these lines of error-info, there are:
CMake Warning at /usr/local/opencv-2.4.13/cmake/OpenCVConfig.cmake:163 (message):
Found OpenCV Windows Pack but it has not binaries compatible with your configuration.
You should manually point CMake variable OpenCV_DIR to your build of OpenCV library.
Call Stack (most recent call first):
CMakeLists.txt:57 (find_package)
CMake Warning at CMakeLists.txt:57 (find_package):
Found package configuration file:
/usr/local/opencv-2.4.13/cmake/OpenCVConfig.cmake
but it set OpenCV_FOUND to FALSE so package "OpenCV" is considered to be NOT FOUND.
So you may notice that it asks you to manually point out the directory of you build version of OpenCV library.
For me, my source codes are at
/usr/local/opencv-2.4.13/
but I make and install my release build of OpenCV at
/usr/local/opencv-2.4.13/release/
so I use:
cmake -D OpenCV_DIR=/usr/local/opencv-2.4.13/release/ ..
and everything works:)
When I compile a program that use OpenCV lib, vision 2.4.8, occurs the similar error, when I point manually Opencv_DIR path to opencv/build ,visio 3.1.0, error occurred like you.
Then I point Opencv_DIR path to opencv/build whose vision is same to the program used. It works.
One of the reason could be the another OpenCV package in another path, that you had installed before. In my case, I had already installed OpenCV for Python in Anaconda package, and the CMake always wanted to refer me to that package.
I simply added:
set(OpenCV_FOUND 1)
to my CMakeList.txt file, this command simply override the other package you may had installed. The final version of CMakeList file which is working for me would be this:
set( OpenCV_FOUND 1 )
find_package(OpenCV 2.4.13 REQUIRED PATHS "C:/opencv")
set(SOURCE_FILES main.cpp)
add_executable(OpenCV_Test ${SOURCE_FILES})
Note:
1- I am using the CMakeList.txt file for Clion IDE
2- I am using it under windows. Probably you may set the relevant path if you use other OS
3- You need also change the OpenCV version if you use other version

Error with Ogre and CMake

I installed Ogre3D 1.8.1 (the source package) on Ubuntu 12.04 and everything went fine (I managed to run some samples on the Ogre interface). However, I hit a problem while I was compiling an external project (that one) that needed the OpenCV, ArUco and Ogre librarys. When I run the CMake of the project, I receive the following:
CMake Error at CMakeLists.txt:46 (find_package):
By not providing "FindOGRE.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "OGRE", but
CMake did not find one.
Could not find a package configuration file provided by "OGRE" with any of
the following names:
OGREConfig.cmake
ogre-config.cmake
Add the installation prefix of "OGRE" to CMAKE_PREFIX_PATH or set
"OGRE_DIR" to a directory containing one of the above files. If "OGRE"
provides a separate development package or SDK, be sure it has been
installed.
-- Configuring incomplete, errors occurred!
I know where the FindOGRE.cmake is, it's in the /usr/local/lib/OGRE/cmake, but I don't know how to say to CMake to look for that folder and fix this problem.
You just need to use the -D command line option along with the CMAKE_MODULE_PATH variable:
cmake . -DCMAKE_MODULE_PATH=/usr/local/lib/OGRE/cmake
Just for the record, an alternative solution would be to add the module path directly in the CMakeLists.txt. For example (tested on Debian 9):
set(CMAKE_MODULE_PATH "/usr/share/OGRE/cmake/modules/;${CMAKE_MODULE_PATH}")
Just make sure to add the line before find_package is called.
For me, it only works to set the following in CMakeLists.txt before find_package:
set(OGRE_DIR /usr/share/OGRE/build/sdk/CMake)
Note that the CMake directory is the one containing OGREConfig.cmake. For some reason, my CMake ignores CMAKE_MODULE_PATH.
Maybe, of some help for someone
For me, this solution work on manjaro:
set(CMAKE_MODULE_PATH "/usr/lib/OGRE/cmake;${CMAKE_MODULE_PATH}")
find_package(OGRE QUIET)
if (OGRE_FOUND)
include_directories( ${ogre_INCLUDE_DIR})
link_directories(${OGRE_LIBRARIES})
message(STATUS "OGRE: FOUND")
else()
message(STATUS "OGRE: NOT FOUND")
endif()

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