Cannot link sndfile library to cmake project (MacOS) - c++

Currently I'm trying to make some spectogram generation for my uni project. I'm trying to build a static library where all the magic will work and just call it from the main() function.
This is my cmake file:
set(CMAKE_CXX_STANDARD 17)
project(demo)
find_package(SndFile REQUIRED)
add_subdirectory(spectogram)
add_executable(demo main.cpp)
target_link_libraries (demo LINK_PUBLIC Spectrogram)
target_link_libraries(demo PRIVATE SndFile::sndfile)
I have installed libsndfile via homebrew, but find_package() refuses to locate the lib and throws this error:
CMake Error at CMakeLists.txt:6 (find_package):
By not providing "FindSndFile.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "SndFile", but
CMake did not find one.
Could not find a package configuration file provided by "SndFile" with any
of the following names:
SndFileConfig.cmake
sndfile-config.cmake
Add the installation prefix of "SndFile" to CMAKE_PREFIX_PATH or set
"SndFile_DIR" to a directory containing one of the above files. If
"SndFile" provides a separate development package or SDK, be sure it has
been installed.
-- Configuring incomplete, errors occurred!
I`ve made some research and found out that libsndfile does not have any .cmake configs inside like other libs, that I can link easily (like OpenCV or spdlog). I would really appreciate any help to solve this horror.

With help of Tsyvarev, I figured out the solution. I used the pkg-config module and a custom cmake file, I found on the web. I will include my final cmake in case someone else will need it:
cmake_minimum_required(VERSION 3.17)
set(CMAKE_CXX_STANDARD 17)
project(demo)
# - Try to find libsndfile
# Once done, this will define
#
# LIBSNDFILE_FOUND - system has libsndfile
# LIBSNDFILE_INCLUDE_DIRS - the libsndfile include directories
# LIBSNDFILE_LIBRARIES - link these to use libsndfile
# Use pkg-config to get hints about paths
find_package(PkgConfig QUIET)
if(PKG_CONFIG_FOUND)
pkg_check_modules(LIBSNDFILE_PKGCONF sndfile)
endif(PKG_CONFIG_FOUND)
# Include dir
find_path(LIBSNDFILE_INCLUDE_DIR
NAMES sndfile.h
PATHS ${LIBSNDFILE_PKGCONF_INCLUDE_DIRS}
)
# Library
find_library(LIBSNDFILE_LIBRARY
NAMES sndfile libsndfile-1
PATHS ${LIBSNDFILE_PKGCONF_LIBRARY_DIRS}
)
find_package(PackageHandleStandardArgs)
find_package_handle_standard_args(LibSndFile DEFAULT_MSG LIBSNDFILE_LIBRARY LIBSNDFILE_INCLUDE_DIR)
if(LIBSNDFILE_FOUND)
set(LIBSNDFILE_LIBRARIES ${LIBSNDFILE_LIBRARY})
set(LIBSNDFILE_INCLUDE_DIRS ${LIBSNDFILE_INCLUDE_DIR})
endif(LIBSNDFILE_FOUND)
mark_as_advanced(LIBSNDFILE_LIBRARY LIBSNDFILE_LIBRARIES LIBSNDFILE_INCLUDE_DIR LIBSNDFILE_INCLUDE_DIRS)
include(FindPkgConfig)
pkg_search_module(SndFile REQUIRED sndfile)
include_directories(${LIBSNDFILE_INCLUDE_DIRS})
add_subdirectory(spectogram)
add_executable(demo main.cpp)
message(STATUS "sndfile include dirs path: ${LIBSNDFILE_INCLUDE_DIRS}")
message(STATUS "sndfile libs path: ${LIBSNDFILE_LIBRARIES}")
target_link_libraries (demo LINK_PUBLIC Spectrogram)
target_link_libraries(demo PRIVATE ${LIBSNDFILE_LIBRARIES})

Related

How to use Caffe library in C++ project with CMakeLists.txt

I'm trying to use Caffe in my C++ project which I compile with CMakeLists.txt, but it doesn't want to work. My only line in the code is
#include <caffe/caffe.hpp>
I compiled Caffe myself, it is installed in the directory "/home/tamas/caffe". My CMakeLists.txt looks like this so far:
cmake_minimum_required (VERSION 3.5)
include(FindPkgConfig)
project (main)
set (CMAKE_CXX_STANDARD 11)
set (CMAKE_CXX_STANDARD_REQUIRED TRUE)
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror -std=c++11 -pthread")
set (source_dir "${PROJECT_SOURCE_DIR}/src/")
set (OpenCV_DIR "/home/tamas/opencv/include/opencv2")
set (Caffe_DIR "/home/tamas/caffe")
file (GLOB source_files "${source_dir}/ssd_video.cpp")
find_package(OpenCV 4.4.0 REQUIRED)
include_directories(${OpenCV_INCLUDE_DIRS})
find_package(Caffe REQUIRED)
include_directories(${Caffe_INCLUDE_DIRS})
add_executable (main ${source_files})
target_link_libraries(main ${OpenCV_LIBS})
target_link_libraries(main ${Caffe_LIBRARIES})
The error is the following:
CMake Error at CMakeLists.txt:24 (find_package):
By not providing "FindCaffe.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Caffe", but
CMake did not find one.
Could not find a package configuration file provided by "Caffe" with any of
the following names:
CaffeConfig.cmake
caffe-config.cmake
Add the installation prefix of "Caffe" to CMAKE_PREFIX_PATH or set
"Caffe_DIR" to a directory containing one of the above files. If "Caffe"
provides a separate development package or SDK, be sure it has been
installed.
-- Configuring incomplete, errors occurred!
The problem is that I have searched and I don't have a FindCaffe.cmake file on my computer. I found an example for CaffeConfig.cmake, but I tried it and it doesn't work either.
Is there a way I can link Caffe with my C++ project? Thanks!
To fix this issue you may do the following:
Download this FindCAFFE.cmake file
Create cmake dir in your repo root directory and put the downloaded file there.
Modify your CMake file:
add set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")
change set (Caffe_DIR "/home/tamas/caffe") to set (CAFFE_ROOT_DIR "/home/tamas/caffe")
change find_package(Caffe REQUIRED) to find_package(CAFFE REQUIRED)
use CAFFE_INCLUDE_DIRS and CAFFE_LIBRARIES for include directories and link libraries respectively
Clean up your build dir and run cmake command again
<library>_DIR should not be set manually in CMake code usually. There are better alternatives that should be used as setting these variable won't necessarily do what you want. It won't change where find_package finds its libraries.
The CaffeConfig.cmake file is generated when building Caffe. You should never download another one, these files are compatible only with a specific build configuration.
The Caffe library supports to be used with CMake, so FindCaffe.cmake is unnecessary.
For find_package to work, either set the <package>_ROOT variable (require CMake 3.12 minimum) or you must append the install path in CMAKE_PREFIX_PATH. Here's a CMake example that uses the prefix path:
# If you only built the library
list (APPEND CMAKE_PREFIX_PATH "/home/tamas/caffe/build-dir")
# If you installed the library there
list (APPEND CMAKE_PREFIX_PATH "/home/tamas/caffe/")
find_package(Caffe REQUIRED)
Note that the Caffe_LIBRARIES and Caffe_INCLUDE_DIRS won't be set. This is old CMake style and the Caffe library uses the new style. This is what you should do:
target_link_libraries(main PUBLIC caffe caffeproto)
This line add both include directory and adds linking to the libraries too.

How do I include the Eigen library in a CMakelist.txt on windows

I am trying to include the Eigen library to my CMakelist.txt. I have followed the CMake instructions on the Eigen Docs but I am using Jetbrain's Clion and not CMake directly. So I do not know how to use the Cmake commands provided. I have researched around but I don't have have a very good understanding of CMake to write Cmakelists, so I haven't been able to get anything to work yet.
this is what I have been using just to test the serup of the library:
cmake_minimum_required(VERSION 3.17)
project(Eigen_Test)
set(CMAKE_CXX_STANDARD 20)
find_package (Eigen3 3.3 REQUIRED NO_MODULE)
add_executable (example example.cpp)
target_link_libraries (example eigen)
add_executable(Eigen_Test main.cpp)
this is the error I have been receiving:
CMake Error at CMakeLists.txt:5 (find_package):
Could not find a package configuration file provided by "Eigen3" (requested
version 3.3) with any of the following names:
Eigen3Config.cmake
eigen3-config.cmake
Add the installation prefix of "Eigen3" to CMAKE_PREFIX_PATH or set
"Eigen3_DIR" to a directory containing one of the above files. If "Eigen3"
provides a separate development package or SDK, be sure it has been installed.
I Have researched many ways to include the library but most methods use command lines which I am unfamiliar with. Also I do not have an Eigen3Config.cmake the only file I have Eigen3Config.cmake.in. I assume there is some install trick that I must not be aware of. If anyone has a way to include clion strictly using a CMakelist.txt, I would be greatly appreciative.
Here a working example with CMake on Windows using the MinGW environment with mingw32-make.exe and g++.exe compiler.
CMakeLists.txt :
# The following lines depends on your project :
cmake_minimum_required(VERSION 3.19)
project(PROJECT_NAME)
set(CMAKE_CXX_STANDARD 17)
# You have to set these variables as Windows environment variables:
# EIGEN3_INCLUDE_DIR <- %EIGEN3_ROOT%
# EIGEN3_DIR <- %EIGEN3_ROOT%\cmake
#
# EIGEN3_INCLUDE_DIR: variable needed for file %EIGEN3_ROOT%/cmake/FindEigen3.cmake
#
# CMAKE_MODULE_PATH: Search path for the module Eigen3 to be loaded by find_package
#
SET( EIGEN3_INCLUDE_DIR "$ENV{EIGEN3_INCLUDE_DIR}" )
SET( CMAKE_MODULE_PATH "$ENV{EIGEN3_DIR}" )
find_package( Eigen3 3.3 REQUIRED )
# include_directories is needed for the compiler to know where looking for Eigen3 header files to be included
include_directories( ${EIGEN3_INCLUDE_DIR} )
add_executable(PROJECT_NAME FILES...)
You can then call the Eigen3 libraries, such as:
#include <Eigen/Core>
Eigen is a header only library, so you don't have to add it to target_link_library, and you don't need a CMake Macro to detect it.
Instead just add the header file into your include path and you should be set.

How to connect the QuaZip library in CMake

My project uses the QuaZip library, and I need to build the project through CMake. How to add this library to CMakeLists?
From the library I need JlCompress
My CMakeLists:
cmake_minimum_required(VERSION 3.6)
#set_property(GLOBAL PROPERTY USE_FOLDERS ON)
#set_property(GLOBAL PROPERTY PREDEFINED_TARGETS_FOLDER "cmake")
set(Boost_USE_STATIC_LIBS OFF)
set(Boost_USE_MULTITHREADED ON)
project(Archiver LANGUAGES CXX)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
find_package(Qt5 REQUIRED COMPONENTS Core Widgets Gui)
find_package(zlib)
find_package(QuaZip5)
include_directories(${QUAZIP_INCLUDE_DIRS})
set(project_ui
mainwindow.ui)
set(project_headers
archive.h
mainwindow.h)
set(project_sources
main.cpp
archive.cpp
mainwindow.cpp)
qt5_wrap_ui(project_headers_wrapped ${project_ui})
qt5_wrap_cpp(project_sources_moc ${project_headers})
add_executable(${PROJECT_NAME} ${project_headers} ${project_sources}
${project_sources_moc} ${project_headers_wrapped})
target_link_libraries(${PROJECT_NAME}
PUBLIC
Qt5::Core
Qt5::Gui
Qt5::Widgets
${QUAZIP_LIBRARIES}
)
Build error:
CMake Warning at CMakeLists.txt:13 (find_package): By not providing
"Findquazip.cmake" in CMAKE_MODULE_PATH this project has asked CMake
to find a package configuration file provided by "quazip", but CMake
did not find one.
Could not find a package configuration file provided by "quazip"
with any of the following names:
quazipConfig.cmake
quazip-config.cmake
Add the installation prefix of "quazip" to CMAKE_PREFIX_PATH or set
"quazip_DIR" to a directory containing one of the above files. If
"quazip" provides a separate development package or SDK, be sure it
has been installed.
CMake Error at CMakeLists.txt:37 (target_link_libraries): The
keyword signature for target_link_libraries has already been used with
the target "Archiver". All uses of target_link_libraries with a
target must be either all-keyword or all-plain.
The uses of the keyword signature are here:
CMakeLists.txt:31 (target_link_libraries)
The find script for quazip is named FindQuaZip5.cmake (it is renamed during installation). So for find quazip you need to use
find_package(QuaZip5)
Meaning of the find script is described in its head:
# QUAZIP_FOUND - QuaZip library was found
# QUAZIP_INCLUDE_DIR - Path to QuaZip include dir
# QUAZIP_INCLUDE_DIRS - Path to QuaZip and zlib include dir (combined from QUAZIP_INCLUDE_DIR + ZLIB_INCLUDE_DIR)
# QUAZIP_LIBRARIES - List of QuaZip libraries
# QUAZIP_ZLIB_INCLUDE_DIR - The include dir of zlib headers
That is, for use quazip with zlib in your code, add these lines:
include_directories(${QUAZIP_INCLUDE_DIRS})
target_link_libraries(${PROJECT_NAME} ${QUAZIP_LIBRARIES})

Use libbitcoin in CLion

I am not a C++ programmer, only have made a course a while ago. Using homebrew I installed libbitcoin and was hoping that I can reference the library like I was able to reference the boost libraries. I also realized that there are no links in /usr/local/bin to the Cellar.
I think I could get it working by using the absolute paths but I am looking for the proper way of handling this constellation that I just mentioned.
Current CMake:
cmake_minimum_required(VERSION 2.8.4)
project(cplusplus)
message(STATUS "start running cmake...")
find_package(boost 1.65.1 COMPONENTS system filesystem REQUIRED)
find_package(libbitcoin 3.3.0 COMPONENTS system filesystem REQUIRED)
message("system: ${CMAKE_SYSTEM_PREFIX_PATH}")
find_library(LIB_BITCOIN libbitcoin)
message("bitcoin: ${LIB_BITCOIN}")
if(Boost_FOUND)
message(STATUS "Boost_INCLUDE_DIRS: ${Boost_INCLUDE_DIRS}")
message(STATUS "Boost_LIBRARIES: ${Boost_LIBRARIES}")
message(STATUS "Boost_VERSION: ${Boost_VERSION}")
include_directories(${Boost_INCLUDE_DIRS})
endif()
add_executable(cplusplus main.cpp)
if(Boost_FOUND)
target_link_libraries(cplusplus ${Boost_LIBRARIES})
endif()
Currently I get these errors:
/Applications/CLion.app/Contents/bin/cmake/bin/cmake -DCMAKE_BUILD_TYPE=Debug -G "CodeBlocks - Unix Makefiles" /Users/johndow/Documents/Workspace/bitcoin-code/cplusplus
-- start running cmake...
-- Boost version: 1.65.1
CMake Error at CMakeLists.txt:8 (find_package):
By not providing "Findlibbitcoin.cmake" in CMAKE_MODULE_PATH this project
has asked CMake to find a package configuration file provided by
"libbitcoin", but CMake did not find one.
Could not find a package configuration file provided by "libbitcoin"
(requested version 3.3.0) with any of the following names:
libbitcoinConfig.cmake
libbitcoin-config.cmake
Add the installation prefix of "libbitcoin" to CMAKE_PREFIX_PATH or set
"libbitcoin_DIR" to a directory containing one of the above files. If
"libbitcoin" provides a separate development package or SDK, be sure it has
been installed.
-- Configuring incomplete, errors occurred!
See also "/Users/johndoe/Documents/Workspace/bitcoin-code/cplusplus/cmake-build-debug/CMakeFiles/CMakeOutput.log".
[Finished]
You seem to have double lookup for libbitcoin library in your CMakeLists file. You are first looking for it by:
find_package(libbitcoin ...)
and then by
find_library(LIB_BITCOIN libbitcoin)
Cmake is not happy (as your error message says) with the find_package() clause as libbitcoin does not provide cmake configuration by itself. You have many ways how to fix it, just two of them:
remove find_package() and use only find_library(), I think this is the simpler way and your project should work this way
provide cmake configuration for libbitcoin by yourself. Good introduction how to do this is here (and good to read anyway):
https://cmake.org/Wiki/CMake:How_To_Find_Libraries
As far as I know, currently libbitcoin does not export any <libbitcoin>Config.cmake package.
But it does export a libbitcoin.pc file for generic use with pkg-config.
ie: /usr/local/lib/pkgconfig/libbitcoin.pc
If you get results from invoking pkg-config --cflags libbitcoin then it's there.
And then you can put something like this in your CMakeLists.txt:
#use this if libbitcoin is installed to some custom location
set(ENV{PKG_CONFIG_PATH} "/path/to/libbitcoin/pkgconfig/:$ENV{PKG_CONFIG_PATH}")
#then later..
find_package(PkgConfig REQUIRED)
pkg_check_modules(LIB_BITCOIN REQUIRED libbitcoin)
#then later..
target_link_libraries(${PROJECT_NAME} PRIVATE ${LIB_BITCOIN_LIBRARIES})
target_include_directories(${PROJECT_NAME} PRIVATE ${LIB_BITCOIN_INCLUDE_DIRS})
That should pull in boost, make the libbitcoin includes visible and solve all manner of compiler and linker woes.
(Or if you are feeling mad, you could always make use of this gist).

CMake user built libraries; cannot specify link libraries for target

I'm building a project in Cpp that will communicate with my Java apps via rabbitmq and post updates to twitter. I'm using a few libraries from github
rabbitmq-c
Rabbit installed to /usr/local/lib64
jansson - json library
I installed this a while back for another project, went to /usr/local/lib
twitcurl - C lib for Twitter API
Got installed to /usr/local/lib
If it matters, I'm using CLion as my IDE, which displays jansson and rabbit under auto-complete when defining includes - so that's picking the libs off my system somehow
e.g.
#include <jansson.h>
#include <amqp.h>
I link them using the target_link_libraries(name libs...) and I see output saying
build$ cmake ..
CMake Error at CMakeLists.txt:30 (target_link_libraries):
Cannot specify link libraries for target "twitcurl" which is not built by
this project.
I set LD_LIBRARY_PATH
export LD_LIBRARY_PATH=/usr/local/lib:/usr/local/lib64
I try to set the CMAKE_LIBRARY_PATH to include usr/local/lib and lib64 but doesn't seem to have any effect. Here's my CMakeLists.txt file
#
# This is a CMake makefile. You can find the cmake utility and
# information about it at http://www.cmake.org
#
cmake_minimum_required(VERSION 2.6)
set(PROJECT_NAME twitterUpdater)
set(SOURCE_FILES main.cpp)
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
set(CMAKE_LIBRARY_PATH ${CMAKE_LIBRARY_PATH} "/usr/local/lib"
"/usr/local/lib64")
project(${PROJECT_NAME})
find_package(X11 REQUIRED)
find_package(OpenCV REQUIRED)
IF (X11_FOUND)
INCLUDE_DIRECTORIES(${X11_INCLUDE_DIR})
LINK_LIBRARIES(${X11_LIBRARIES})
ENDIF ( X11_FOUND )
IF (OpenCV_FOUND)
include_directories(${OpenCV_INCLUDE_DIRS})
link_libraries(${OpenCV_LIBS})
ENDIF(OpenCV_FOUND)
add_executable(${PROJECT_NAME} ${SOURCE_FILES})
target_link_libraries(${project_name} twitcurl jansson rabbitmq)
What's confusing me is another project I have uses jansson by simply adding it here TARGET_LINK_LIBRARIES(${project_name} dlib jansson)
What did I miss?? Thanks
CMake variables are case sensitive, thus the variable ${project_name} results in an empty string. Use ${PROJECT_NAME} instead, i.e.:
target_link_libraries(${PROJECT_NAME} twitcurl jansson rabbitmq)
Running CMake with the flag --warn-uninitialized helps you detect mistakes like this.