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CMake does not find Boost libraries when using the android-cmake toolchain binding file

I am trying to create a CMake project for code that uses Boost libraries. I want to create it for Android, and I use this project as a link: https://code.google.com/p/android-cmake/ .

I want to use the static Boost libraries that I previously created for android, and did not make them part of the compiled project.

This is my CMakeLists.txt for the part of the project that uses Boost

#BOOST set(BOOST_ROOT /home/neb/workspace/SDLActivityCMAKE/jni/boost) set(Boost_INCLUDE_DIR /home/neb/workspace/SDLActivityCMAKE/jni/boost/include/boost-1_53) set(BOOST_INCLUDEDIR /home/neb/workspace/SDLActivityCMAKE/jni/boost/include/boost-1_53) set(Boost_LIBRARY_DIR /home/neb/workspace/SDLActivityCMAKE/jni/boost/lib) set(BOOST_LIBRARYDIR /home/neb/workspace/SDLActivityCMAKE/jni/boost/lib) set(Boost_USE_STATIC_LIBS ON) set(USE_STATIC_BOOST ON) set(Boost_USE_STATIC_RUNTIME ON) set(BOOST_COMPILER gcc) find_package(Boost COMPONENTS "thread-gcc-mt-1_53" "date_time-gcc-mt-1_53" REQUIRED) include_directories(${Boost_INCLUDE_DIR}) link_directories(${Boost_LIBRARY_DIR}) #BOOSTEND add_executable(main main.cpp) target_link_libraries( main ${Boost_LIBRARIES} )

When I run the regular cmake command ( cmake .. from the jni folder subdirectory in the android project), there is no problem, cmake finds the libraries. When I make cmake to use android.toolchain.cmake provided by the project mentioned above, I get this (I use the -DBoost_DEBUG option).

 -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:566 ] _boost_TEST_VERSIONS = 1.56.0;1.56;1.55.0;1.55;1.54.0;1.54;1.53.0;1.53;1.52.0;1.52;1.51.0;1.51;1.50.0;1.50;1.49.0;1.49;1.48.0;1.48;1.47.0;1.47;1.46.1;1.46.0;1.46;1.45.0;1.45;1.44.0;1.44;1.43.0;1.43;1.42.0;1.42;1.41.0;1.41;1.40.0;1.40;1.39.0;1.39;1.38.0;1.38;1.37.0;1.37;1.36.1;1.36.0;1.36;1.35.1;1.35.0;1.35;1.34.1;1.34.0;1.34;1.33.1;1.33.0;1.33 -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:568 ] Boost_USE_MULTITHREADED = TRUE -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:570 ] Boost_USE_STATIC_LIBS = ON -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:572 ] Boost_USE_STATIC_RUNTIME = ON -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:574 ] Boost_ADDITIONAL_VERSIONS = -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:576 ] Boost_NO_SYSTEM_PATHS = -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:644 ] Declared as CMake or Environmental Variables: -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:646 ] BOOST_ROOT = /home/neb/workspace/SDLActivityCMAKE/jni/boost -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:648 ] BOOST_INCLUDEDIR = /home/neb/workspace/SDLActivityCMAKE/jni/boost/include/boost-1_53 -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:650 ] BOOST_LIBRARYDIR = /home/neb/workspace/SDLActivityCMAKE/jni/boost/lib -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:652 ] _boost_TEST_VERSIONS = 1.56.0;1.56;1.55.0;1.55;1.54.0;1.54;1.53.0;1.53;1.52.0;1.52;1.51.0;1.51;1.50.0;1.50;1.49.0;1.49;1.48.0;1.48;1.47.0;1.47;1.46.1;1.46.0;1.46;1.45.0;1.45;1.44.0;1.44;1.43.0;1.43;1.42.0;1.42;1.41.0;1.41;1.40.0;1.40;1.39.0;1.39;1.38.0;1.38;1.37.0;1.37;1.36.1;1.36.0;1.36;1.35.1;1.35.0;1.35;1.34.1;1.34.0;1.34;1.33.1;1.33.0;1.33 -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:734 ] location of version.hpp: /home/neb/workspace/SDLActivityCMAKE/jni/boost/include/boost-1_53/boost/version.hpp -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:754 ] version.hpp reveals boost 1.53.0 -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:786 ] guessed _boost_COMPILER = -gcc46 -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:796 ] _boost_MULTITHREADED = -mt -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:839 ] _boost_RELEASE_ABI_TAG = -s -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:841 ] _boost_DEBUG_ABI_TAG = -sd -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:884 ] _boost_LIBRARY_SEARCH_DIRS = /home/neb/workspace/SDLActivityCMAKE/jni/boost/lib;/home/neb/workspace/SDLActivityCMAKE/jni/boost/lib;/home/neb/workspace/SDLActivityCMAKE/jni/boost/stage/lib;/home/neb/workspace/SDLActivityCMAKE/jni/boost/include/boost-1_53/lib;/home/neb/workspace/SDLActivityCMAKE/jni/boost/include/boost-1_53/../lib;/home/neb/workspace/SDLActivityCMAKE/jni/boost/include/boost-1_53/stage/lib;C:/boost/lib;C:/boost;/boost/boost_1_53_0/lib;/boost/boost_1_53/lib;/boost/lib;/boost;/sw/local/lib -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:962 ] Searching for THREAD-GCC-MT-1_53_LIBRARY_RELEASE: boost_thread-gcc-mt-1_53-gcc46-mt-s-1_53;boost_thread-gcc-mt-1_53-gcc46-mt-s;boost_thread-gcc-mt-1_53-mt-s-1_53;boost_thread-gcc-mt-1_53-mt-s;boost_thread-gcc-mt-1_53 -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:994 ] Searching for THREAD-GCC-MT-1_53_LIBRARY_DEBUG: boost_thread-gcc-mt-1_53-gcc46-mt-sd-1_53;boost_thread-gcc-mt-1_53-gcc46-mt-sd;boost_thread-gcc-mt-1_53-mt-sd-1_53;boost_thread-gcc-mt-1_53-mt-sd;boost_thread-gcc-mt-1_53-mt;boost_thread-gcc-mt-1_53 -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:962 ] Searching for DATE_TIME-GCC-MT-1_53_LIBRARY_RELEASE: boost_date_time-gcc-mt-1_53-gcc46-mt-s-1_53;boost_date_time-gcc-mt-1_53-gcc46-mt-s;boost_date_time-gcc-mt-1_53-mt-s-1_53;boost_date_time-gcc-mt-1_53-mt-s;boost_date_time-gcc-mt-1_53 -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:994 ] Searching for DATE_TIME-GCC-MT-1_53_LIBRARY_DEBUG: boost_date_time-gcc-mt-1_53-gcc46-mt-sd-1_53;boost_date_time-gcc-mt-1_53-gcc46-mt-sd;boost_date_time-gcc-mt-1_53-mt-sd-1_53;boost_date_time-gcc-mt-1_53-mt-sd;boost_date_time-gcc-mt-1_53-mt;boost_date_time-gcc-mt-1_53 -- [ /usr/share/cmake-2.8/Modules/FindBoost.cmake:1108 ] Boost_FOUND = FALSE CMake Error at /usr/share/cmake-2.8/Modules/FindBoost.cmake:1195 (message): Unable to find the requested Boost libraries. Boost version: 1.53.0 Boost include path: /home/neb/workspace/SDLActivityCMAKE/jni/boost/include/boost-1_53 The following Boost libraries could not be found: boost_thread-gcc-mt-1_53 boost_date_time-gcc-mt-1_53 No Boost libraries were found. You may need to set BOOST_LIBRARYDIR to the directory containing Boost libraries or BOOST_ROOT to the location of Boost. Call Stack (most recent call first): src/CMakeLists.txt:15 (find_package) -- Configuring incomplete, errors occurred!

So, I see that CMake is looking for libraries in this exact directory: /home/neb/workspace/SDLActivityCMAKE/jni/boost/lib In which there are compiled static libraries:

 neb@neb-VirtualBox :~/workspace/SDLActivityCMAKE/jni/boost/lib$ ls -l total 24440 -rwxrwxrwx 1 neb neb 557190 sie 27 12:36 libboost_date_time-gcc-mt-1_53.a -rwxrwxrwx 1 neb neb 1348474 sie 27 12:36 libboost_filesystem-gcc-mt-1_53.a -rwxrwxrwx 1 neb neb 827216 sie 27 12:36 libboost_iostreams-gcc-mt-1_53.a -rwxrwxrwx 1 neb neb 6813972 sie 27 12:36 libboost_program_options-gcc-mt-1_53.a -rwxrwxrwx 1 neb neb 12927086 sie 27 12:37 libboost_regex-gcc-mt-1_53.a -rwxrwxrwx 1 neb neb 1197696 sie 27 12:37 libboost_signals-gcc-mt-1_53.a -rwxrwxrwx 1 neb neb 159462 sie 27 12:36 libboost_system-gcc-mt-1_53.a -rwxrwxrwx 1 neb neb 1177994 sie 27 12:37 libboost_thread-gcc-mt-1_53.a`

I set all the variables pointing to the BOOST directories that I could find, I set the variables, indicating that the Boost libraries should be static, but they still do not detect them. What else can I do?

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4 answers

Finding Magnification Using CMake

Let me start by saying that getting CMake to find Boost can be difficult, because the machine in FindBoost.cmake will bite you, and the KitWare creators of CMake have some of the worst documents of any popular project I have ever encountered. You will have to go through the FindBoost.cmake source to debug it if it doesn't work.

Cross-compiled increase

The directory that you installed using crossed addition looks like this: 1.62.0

 boost-arm-build/include boost-arm-build/include/boost-1_62 boost-arm-build/lib

Call CMake from the Project-Build directory

 cmake \ -DBoost_NO_SYSTEM_PATHS=TRUE \ -DBoost_ADDITIONAL_VERSIONS="1.62" \ -DCMAKE_TOOLCHAIN_FILE=../android.toolchain \ -DBOOST_ROOT="../boost-arm-build" \ ../Project/

-DBoost_ADDITIONAL_VERSIONS - CMake searches for Boost using a hard-copy list of strings, if your CMake is older than the version of Boost you are building, will not know where to look in the include directory, so you will need to go through this together. Although the version is actually 1.62.0, boost adds to boost-1_62, so I use 1.62 instead. In FindBoost.cmake you will find that each version is added twice, as in "1.62.0" "1.62" for this very reason.

You should also check the file names of the libraries you created, in my example, consider system :

 libboost_system-gcc-mt-1_62.a libboost_system-gcc-mt-1_62.so # Symbolic link to libboost_system-gcc-mt-1_62.so.1.62.0 libboost_system-gcc-mt-1_62.so.1.62.0 libboost_system-gcc-mt-d-1_62.a libboost_system-gcc-mt-d-1_62.so # Symbolic link to libboost_system-gcc-mt-d-1_62.so.1.62.0 libboost_system-gcc-mt-d-1_62.so.1.62.0
  • gcc - used compiler
  • mt - multithreaded
  • d - debug
  • 1_62 - boost version, obviously

If you see libboost_system.a, it means that you were not able to create boost with --with-layout=versioned and probably should check my SO answer for building building with NDK . If you see clang instead of gcc , it’s great that you created boost with clang, but you probably need to tell CMake that clang exists using the Boost_COMPILER flag.

 -DBoost_COMPILER="-clang"

Android.toolchain file

 set(CMAKE_SYSTEM_NAME Android) set(CROSS_COMPILER_DIR /opt/ndk-R13-standalone) set(CMAKE_C_COMPILER ${CROSS_COMPILER_DIR}/bin/arm-linux-androideabi-gcc) set(CMAKE_CXX_COMPILER ${CROSS_COMPILER_DIR}/bin/arm-linux-androideabi-g++) set(ANDROID_NATIVE_API_LEVEL android-19) set(ANDROID_ABI armeabi-v7a) set(ANDROID_STL gnustl_static) set(CMAKE_SYSROOT ${CROSS_COMPILER_DIR}/sysroot) set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT}) # search for programs in the build host directories set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
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I had the same problem. Using find_host_package(Boost COMPONENTS ..) instead of find_package(Boost COMPONENTS ..) solved the problem for me.

(Found here: http://code.google.com/p/android-cmake/issues/detail?id=16 )

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There are several issues here.

It looks like your boost libraries were created without runtime-link=static , i.e. they are not statically linked to the C ++ standard library. If they were, then their postfix names must contain s (see enlarge documents on library names )

Another problem is that CMake > FindBoost module expects COMPONENTS arguments to be in the form of "date_time", "thread", and not the full name that you specified.

Another minor problem is that you do not need to set Boost_INCLUDE_DIR or Boost_LIBRARY_DIR ; they are installed by the CMake module if successful. However, installing them should not cause any problems, it's just an extra mess.

In addition, for BOOST_ROOT , BOOST_INCLUDEDIR and BOOST_LIBRARYDIR they are usually set via the command line using -D or set as environment variables to avoid hard-coding paths specific to your computer in CMakeLists.txt.

The last thing you should remove link_directories , Its own documentation hinders its use, and it is not needed, since you already pass the full paths to speed up the libs in the target_link_libraries call.

So, the final version should be more like:

 #BOOST set(Boost_USE_STATIC_LIBS ON) set(USE_STATIC_BOOST ON) # Not sure if you really need this later. If not, delete. set(Boost_USE_STATIC_RUNTIME OFF) set(Boost_COMPILER -gcc) find_package(Boost COMPONENTS thread date_time REQUIRED) include_directories(${Boost_INCLUDE_DIRS}) #BOOSTEND add_executable(main main.cpp) target_link_libraries(main ${Boost_LIBRARIES})

and you can invoke CMake as follows:

 cmake . -DBOOST_ROOT=<path to root> -DBOOST_INCLUDEDIR=... -DBOOST_LIBRARYDIR=...
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I ran into the same problem. I created boost using this Boost repository for android and I only have static libraries.

I don't think you really need to use cmake find_package. This is how I just use it in CMakeList.txt

 add_library(boost_system-gcc-mt-1_55 STATIC IMPORTED GLOBAL) set_target_properties( # Specifies the target library. boost_system-gcc-mt-1_55 # Specifies the parameter you want to define. PROPERTIES IMPORTED_LOCATION # Provides the path to the library you want to import. ${CMAKE_SOURCE_DIR}/src/main/jni/boost/lib/libboost_system-gcc-mt-1_55.a ) SET(Boost_LIBRARY_DIR ${Boost_LIBRARY_DIR} boost_system-gcc-mt-1_55) # You can make this include just once include_directories("src/main/jni/boost/include/boost-1_55") target_link_libraries(${MyNDKSampleLibs} ${Boost_LIBRARY_DIR} ${log-lib}

The only thing I can mention here is not to forget the cmake var ${CMAKE_SOURCE_DIR} set_target_properties in set_target_properties .

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Source: https://habr.com/ru/post/953552/

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