CODEWITHSUNDEEP
linuxbluetoothcmakebluez
Bill Goldberg
Bill Goldberg

Reputation: 1829

How to include bluez latest version library using CMake in project

I want to include bluez latest version (5.44) to my C program project. I am using CMake for build purpose. I tried using pkg_check_modules as below 

pkg_check_modules (BLUEZ REQUIRED bluez)
include_directories(${BLUEZ_INCLUDE_DIRS})
link_directories(${BLUEZ_LIBRARY_DIRS})

But It always finds the older version 5.37. How can I point this to take latest version ?

I already tried this as well but it throws the error as below.

pkg_check_modules (BLUEZ REQUIRED bluez=5.44)
include_directories(${BLUEZ_INCLUDE_DIRS})
link_directories(${BLUEZ_LIBRARY_DIRS})

Error getting : 

Checking for module 'bluez=5.44'
--   
CMake Error at /usr/share/cmake-3.5/Modules/FindPkgConfig.cmake:367 (message):
  A required package was not found
Call Stack (most recent call first):
  /usr/share/cmake-3.5/Modules/FindPkgConfig.cmake:532 (_pkg_check_modules_internal)
  CMakeLists.txt:30 (pkg_check_modules)

I downloaded the latest bluez version and built and installed using sudo make install. I am able to find and use the bluetoothctl tool.

Upvotes: 1

Views: 2264

Answers (3)

3x3cvte
3x3cvte

Reputation: 1

For installing:

sudo apt-get install libbluetooth-dev

Check installing:

execute@execute:~$ pkg-config --cflags --libs bluez
-lbluetooth

My cmake:

pkg_check_modules (BLUEZ REQUIRED bluez)

add_executable(test_linux_bluetooth test_linux_bluetooth.cpp)

target_link_libraries(test_linux_bluetooth PRIVATE bluetooth)

Upvotes: 0

Asthor
Asthor

Reputation: 1004

While the question has a manually compiled Bluez version included in many cases people might run into the exact same issue after doing a standard installation of Bluez through apt on any Debian system.

However to do development in a project with Bluez one also has to install Bluez developement files. This can be done with

apt install libbluetooth-dev

which should in turn install the bluez.pc file in the standard location making both pkg-config --modversion bluez and any pkg_check_modules (BLUEZ REQUIRED bluez) resolve correctly.

Upvotes: 0

nega
nega

Reputation: 2747

Firstly, you need to make sure that pkg-config can find your installed version of bluez. If it can't, then CMake won't be able to either.

$ pkg-config --modversion bluez

If that does not give you the version you expect, then you need to find the bluez.pc for the version that you want, and make sure its directory is at the beginning of PKG_CONFIG_PATH. Since you stated that you used sudo make install, the bluez.pc you want is most likely at /usr/local/lib/pkgconfig/bluez.pc. (You will need to look yourself to be sure.) If that's the case, then

$ PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:${PKG_CONFIG_PATH} pkg-config --modversion bluez

should return the the version your looking for. If so, do what's necessary to make that change permanent to your shell. Delete your CMake cache, and re-cmake your project.

Upvotes: 0

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