Cmake link dll to executable. An example from which to crib would be .

Cmake link dll to executable lib 文件的关系、以及正确链接这些库的部分。 这将确保你能够完全理解并实践如何在 Windows 上使用 CMake 来管理 DLL。 If you bother about finding a . Rule variable to link an executable. Exporting symbols for MSVC-based compilers is necessary to generate a “example. --config release. Pass to your CMake command line: -DBUILD_SHARED_LIBS=OFF. This makes a cmake "target" named myglfw (in CMake a target is either a library or an executable). cpp) @BenVoigt I am a Linux guy, I am a beginner with Windows building tool/env. lib + . To have the I have an external project and an imported shared library. Moreover, Repo-B uses Repo-A, therefore Repo-A appears in the interface listing of Repo-B. Or by setting the the global CMAKE_RUNTIME_OUTPUT_DIRECTORY and CMAKE_LIBRARY_OUTPUT_DIRECTORY variables which will do this for all targets in your sample_project. GameCenter) you need to have a "Link Binary with Libraries"-buildstep and then link with "GameKit. I was not able to tell if this was resolved or still an issue. add_executable(main main. 26 because of "-t" argument 그럼 이제 build 디렉토리로 들어가서 make 를 실행해봅시다. 编译完成之后所得的exe文件需要配合dll文件才能正常使用，否则会报错：找不到dll。通常将dll放在与exe同一个目录下 （2）静态库 lib clang++. exe files, or even shared libraries / . txt, I use few codes trying to copy or generate . 21 版本提供的拷贝 dll 方式， 以及开源库 libigl 中的拷贝 dll 的方式， 并对 igl_copy_dll() 做了粗浅的分析. add_library(bingitup STATIC bingitup. lib as an input on Windows. cpp ) SET ( RESOURCE_FILES_SRC test. The named target must be created by add_library() within the project or as an IMPORTED library. dll into the directory with . By default the library file will be 本节教程对应的GitHub示例. I'm working on Windows with Clion where I should config this with CMake. For example, a Windows resource DLL or a managed C++/CLI DLL that exports no unmanaged symbols would need to be a MODULE library. dll" > issue is to change the default location that various components end up. This command is crucial for linking your target (executable or library) with other libraries it depends on visualstudioとc++でゲームエンジンを作っていて、ユーザの作るカスタムスクリプトからdllを作って、エンジンとくっつけたい。そういう思いからcmakeでdllを作る方法を調べた。 実例. Follow answered Apr 2, 2021 at 17:58. ls. gcc -static -O0 -g main. dir/main. Moreover, to run output project with Visual Studio, you'll need both . 1w次，点赞56次，收藏161次。该命令可以指定目标（exe或者so文件）需要包含的头文件路径，命名为 < target > 的命令必须是由 add _ Executive ()或 add _ library ()之类的命令创建的，并且不能是 ALIAS 目标。link_libraries用来链接静态库，target_link_libraries用来链接导入库，即按照header file + . 16 質問 GitHub で公開されている MinHook というライブラリの DLL を使いたいのですが、Cmake を使ってビルドする方法がわかりません。 僕のプロジェクトはこのようなディレクトリ構造になっています。 プロジェクト名はTestです。 CMakeLists. The app. sln and building with Visual Studio, it crashes as. Boost) are installed and we choose to link to Boost statically, then we don't need to copy the dll. rs - it's not propagated there (attempting to read that env var results in None). res ) ADD_LIBRARY (test SHARED ${SRC}) ADD_CUSTOM_COMMAND ( TARGET test PRE_LINK COMMAND Sometimes CMake knows more about whether the dlls is needed. I searched a lot and found that in earlier versions there was a problem where you could not link intermediate libraries in the result executable. dll and . I was hoping for a way to define this as part of the interface to the imported library so consumers only The only way to link resource files to exe or dll is by using borland linker ilink32. cmake Makefile program cmake . Here’s my project structure. dll. So, you can declare it as an IMPORTED library with add_library(myglfw STATIC IMPORTED ). I tried this way: cmake_minimum_required(VERSION 3. link_directories() can be used to provide additional hints to the find_package() command about where to search for these libraries. I have a function that recursively goes through the exe-targets dependency tree using the LINK_LIBRARIES, IMPORTED_LINK_INTERFACE_LIBRARIES_config and To build the client executable file, you must link with the DLL's import library. Right click on the app project and click Set as Startup Project. Since I have that 10-year-old bug where my installations of VS 2008 AND VS 2010 cannot create a new C++ project, I figured I'd bend my pick on generating a DLL Solution with cmake. dll I am using the CMAKE_MSVC_RUNTIME_LIBRARY option so that MSVC uses /MTd to statically link an executable. 追記. Then when you link mytest to it, mytest will have a correct link line constructed and it will see the right headers. Currently, this is my CMak One more alternative, in the case you are working with the Appstore, need "Entitlements" and as such need to link with an Apple-Framework. txt main. This what I did in my script to resolve this issue: PROJECT(Resourcetest) SET (SRC dllmain. dll that we 考虑到 cmake 语法的啰嗦， 这里忽略。 总结. If it is created within the project an ordering dependency Setup: Repository A creates a shared library that we have a relocatable packages for. 2025-03-16. a Windows DLL) Also I link few shared libs to the same executable. exe / devenv. or set that variable in the CMake scripts. Looking at the documentation about rustc-link-search, it says "These paths _cmake dll. This will produce the myapp. The LINKER: prefix and , separator can be used to specify, in a portable way, options to pass to the linker tool. c /usr/lib/x86_64-linux-gnu/libpthread. target_link_libraries(${PROJECT_NAME} ${LIBRARIES}) add_custom_command ( TARGET ${PROJECT_NAME} POST_BUILD COMMAND ${CMAKE_COMMAND} -E 指令 target_link_libraries() 用來指定某個 target 要和哪些程式庫連結，當連結的程式庫是另一個 target 時，CMake 會自動建立相依關係以確保建置順序正確。 下面這個例子 CMake 會替 MyProject 產生 myexec 和 mylib 兩個 target，並且在建立 myexec 時和 mylib 連結。 Moreover, you'll need to add_dependencies(myproj mylib) to insure that . Atkins. lib and the . txt:. lib) #为生成目标添加一个库 可以是多个 比如 On Ubuntu, I have two directories: build and src. dll 其实之前我用 VSCode 的时候也遇到了，只需要将 libstdc++ 和 libgcc 静态链接就行了，谁知 CMake 在 CMAKE_EXE_LINKER_FLAGS 这个变量好像就没几个人用, 网上普遍建议的是使用 target_link_libraries 的写法，注意 target_link_libraries 要加在 add_executable "but from the point of view of the text, these are different issues. To statically link the std lib there is no cross-compiler way. txt references the correct version of OpenCV you installed. you need minimum version of 3. Rule variable to link an executable for the given language. lib when built in the release configuration, and md. exe file will not be linked before . That’s the compiler independent equivalent to -static. On linux, the linker will generate an rpath @【vscode教程】vscode中使用C++，包括生成可执行文件exe和动态链接库dll 1. As with many engineering tasks, you might want to take a step back and create a minimal verification example for yourself. My folder structure is simple: Before this will run in Visual Studio, fix the following glitches: By default, ALL_BUILD will be the startup project. サンプル・コード Thanks again Mr. framework". I have a . If I build SubDynLib alone, and then put the SubDynLib. txt CMakeFiles cmake_install. A quick solution may be to declare MyProjectLib as a static library:. cpp) target_link_libraries(main bingitup) bingitup is the same name you'd give a target if you create the static library in a CMake project:. 简要讨论了 Windows 上 C++ 开发阶段拷贝 . I'm trying to equip OpenCV 1. vscode中使用快捷键 ctrl+shift+p打开搜索栏，输出cmake，选择cmake:quickstart 3. " - Whatever static or shared, Linux (. 21 for TARGET_RUNTIME_DLLS also this part only works for version 3. dll files are generated. CMake "injects" the libraries on a "low level" into the commandline, Here are some further changes to the add_custom_command part: Copy Debug and Release dlls only when the according build configuration is selected I am trying to link with a DLL executable using CMake. Check DLL Path and Dependency: dllやexeはフォルダへの相対パス名です。exeでdllをリンクするための指定（target_link_libraries）を行いますので、dllを先にadd_subdirectoryしています。 ポイントは11行目～13行目にあります。 dllのヘッダ・ファイルをexeが#includeします。 To pass options to the linker tool, each compiler driver has its own syntax. You already have the library built, producing the . txt 내에서 사용되며, 기본적으로 이 이름으로 라이브러리 파일이 생성됩니다. You can do this by setting the appropriate paths in CMakeLists. 以下のリポジトリで公開。 dllはリンク先のままのlibフォルダを見ればok。 Thanks. If you use an external makefile or build system, specify the import library together with the other Building an out-of-source DLL Dependency in CMake. h文件 所有编译的 For linking, CMake should do the right thing and link DLLs without having to copy them around. ) -- Daniel Schepler _____ From: CMake [cmake-bounces at cmake. However when debugging, the shared libraries must be copied into the directory where the executable being debugged is created. e. Essentially, it tells the CMake build system which libraries are necessary for your target to function correctly. 新建文件夹，vscode打开 2. if (WIN32) find_library(WINSOCK2 ws2_32) target_link add_library는 아래의 폼으로 사용됩니다. org] on behalf of Marek Vojtko (Firaxis) Verify CMake Configuration: Confirm that CMakeLists. exe in CMake. Make sure to specify the path to the DLL file in the command. Basically, that means a DLL which has symbols on-board. Now I have another library (Called SubDynLib), that i want to link to DynLib. This is because CMake expects a SHARED library to always have an associated import library on Windows. Opening app1. txt file has the lines: add_executable(Test main. Finally, you tell the cmake to link the executable to the library target you When target_link_library(foo bar) is called with bar as a target of a SHARED library, CMake will use a static lib libbar. I tried adding the lib reference using その辺を CMake 自身が提供しているので、これを使うと楽できます。 cmake -Eコマンドです。CMakeの中で使う時は、`${CMAKE_COMMAND}でcmakeを呼び出せます。パスを切っていない時にも対応しているのだろうと思います。 3-2. txt file. I tried to: set_property(TARGET licensecc::licensecc_static PROPERTY MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debu CMake Discourse 使用 CMake 编译生成 DLL（动态链接库）详解 在现代软件开发中，动态链接库（DLL）是实现模块化和代码复用的重要手段。尤其在 Windows 平台上，DLL 的使用尤为普遍。本文将详细介绍如何使用 CMake 编译生成 DLL，包括项目配置、代码编写、构建步骤以及跨平台 One way to solve this is simply to add the library dependency to the target in the main CMakeLists. This won't work for Qt libs and Mingw libs itself, because these would need to be compiled statically, too. exe时将无法找到库文件 add_executable(main main. dll, that it doesn't have a SONAME (a *nix only thing, anyway, but good to include), and the include path that linkees should use to find its associated headers. exe files to be in the same folder, and CMake does not provide this by default. so) After running cmake in the b At the moment you don’t have a standalone executable. 本节我们将学习如何在项目中引用lib，相关的api有： What's the best way to coerce cmake into building my library and executable into a 'staging directory' — say MyStage — to keep targets separate from source? but find myself struggling to get my library to link with my executable. I’m trying to modernize a 14 year old CMakeLists based project, and several targets end up needing an out-of-tree built imported. Personally, I find it much simpler just to expect the Path to include the locations of the DLL files as opposed to copying them. 之前我们学到了如何编写一个可执行程序和Library，在继续学习之前，需要解释下target，在cmake中我们可以给executable和library设置一个target名字，这样可以方便我们在后续对target进行更加详细的属性设置。. 11. Therefore, the compiled machine code is readily available as part of the executable files. Copy the dll to the exe I have fairly complex code called Xyce that builds statically under mac/linux and windows with CMake just fine. The standard library is still not linked statically. cpp) 一つのCMakeLists. LINKER: is replaced by the appropriate driver option and , by the appropriate driver separator. dll artifacts. People often assume that the DLL must be in A You want to statically compile. For the library, I have the following CMakeLists. 10 and have a problem linking a compiled library to a test executable in CMake. exe executable depends on the math. so) or Windows (. add_executable(可执行文件名 所有编译的. Specify Library Search Paths The primary 環境 C++ 20 CLion Cmake 3. Exporting Targets ¶. cpp) How do i link a dll? I tried few examples from the decumentation, but completely useless, no real world examples on how to load the library I tried to do add this in the cmakelist target_link_libraries(project_name C:&hellip; In this post, instead of throwing instructions for some random commands, I aim to explain how to employ modern CMake step by step to build executables (applications) and During the final stages of building the project, static libraries are linked into the executable files (binaries / . Your problem is windows - specifically, the absence of an RPATH equivalent for . Cmake的动态链接库dll的生成并测试 /VStudio/SHIXI_PRD6/mylib) # 添加链接库文件目录 注意，此行必须在add_executable前，否则编译器在生成main. I have a task to build a DLL with MSVS that can be accessed from a Python script using ctypes. 15 FATAL_ERROR) cmake_policy(SET My project has 3 shared libraries, and 2 executables. dlls. My final “Xyce” binary correctly, dynamically 文章浏览阅读5. For Entitlements to work (e. cpp) target_link_libraries(Test libCamera. txt using the "add_library()" function to Hello, I have a main, and I can link a library (Called DynLib) to that main, dynamically (SHARED). user680891 user680891. Share. Under Mac Os and Liniux this works fine. So CMake can make a better decision than manually specifying which files to copy. References Over the decades, a lot has been written about associating a DLL with an executable and getting that DLL into install directories, or getting that DLL into ctest directories. a) never seems to be created though. dylib or xyce. dll is an external library for your CMake project, so the duplicate question has been chosen correctly. Improve this answer. # project name and also the name of the executable to build PROJECT = myapp # the program to compile and link CC = gcc # the program to remove files RM = rm # compiler flags: # -g adds debugging information to the executable file # -Wall turns on most, but not all, compiler warnings CFLAGS = -g -Wall # remove flags: # -f ignore nonexistent This should be a simple one but since I can't find any sample on Google thus I need your help to correction the CMake workflow in this DLL linking job. Hi all, am very new to CMake so pardon me if get something wrong. link_directories(lib路径) 3。生成可执行文件. add_executable 명령어를 통해서 간단한 실행파일을 생성하는 것과 유사한데, targetName은 라이브러리를 참조하기 위해 CMakeLists. It is important to keep in mind that "link" in CMake's target_link_libraries() is for a project I need to create an executable that includes all the libraries that I used (opencv, cgal) in order to execute it on a computer that has not those libraries. a My cmake script successfully 文章浏览阅读1. h which I want to add to my CMake project and use in cpp code. lib). For Windows developers, harnessing the power of CMake can be a game-changer in simplifying the The generated build system will link myexe to m. Type in the cmake command (assuming cmake is in the PATH environment variable): C:> cd \path\to\example\animallib_shared\build C:> cmake . Resolution of find_package() Often, you use find_package() to locate external libraries. But they are only distributed as dynamic linked libraries. The driver prefix and driver separator are given by the values of the I would like to build: A shared library An executable using the compiled shared library in point 1. For GCC use: I had the same issue. dll) > and > a link time component (. The real power of IMPORTED targets is when the project providing the Each <item> may be:. Is it possible to tell cmake to use a dll directly when target_link_library is called? I am trying to achieve the equivalent of following command by CMake. dll), I've made the CMakeLists. a or bar. At runtime, all the dlls you depend upon needs be in a folder that the runtime linker searches for (usually the same folder of the executable, but there are 12 potential places). During the Install phase, everything is copied to the correct location. //Notice: lib. Purpose. c) ADD_EXECUTABLE(myexe main. dll, . Therefore, the I wanted to use Windows c++ classes and use them in another c++ applications through shared Windows DLLs, while using CMake to generate build files and Visual Studio to compile into final executables. The target_link_libraries() doesn’t It is a different story for running an executable. /hello_world_exe. add_executable(App While I prefer a shared library (m. so文件。 如果Win10下图形界面打开工程可以看出： 对于hello_world_exe工程，有. One thing that will help with the "can't find . Finally, we have an application C that links with/uses Repo-B and because of the interface automatically During the final stages of building the project, static libraries are linked into the executable files (binaries / . dll 的必要性， 并给出 cmake 3. (And I often write small batch scripts to set up this development environment, and then optionally start cmake-gui. While IMPORTED targets on their own are useful, they still require that the project that imports them knows the locations of the target files on disk. To create a library that produces a DLL: 找不到 libwinpthread-1. My goal is to be able to compile my binary with command line and cmake in linux and windows env. 选择生成可 Troubleshooting CMake Linker Errors: Dealing with link_directories() Issues . dll), any_dll. 4) To make a dll you need add_library(mydlltarget SHARED mysourcefiles) instead of add_executable(myexetarget mysourcefiles). a' Upon looking over the CMake docs, it says "For DLL platforms an import library will be created for the exported symbols and then used for linking. 0. dll to the folder of the executable file. rc ) SET ( RESOURCE_FILES test. c) TARGET_LINK_LIBRARIES(myexe m) The CMake configuration is done and generated done. add_library(MyProjectLib STATIC ) Another option could be If a library does not export any symbols, it must not be declared as a SHARED library. CMAKE_INSTALL_NAME_DIR CMAKE_INSTALL_RPATH CMAKE_INSTALL_RPATH_USE_LINK_PATH. txtに複数add_executableを書くこともできる。 アセンブラの有効化 In CMake and several build systems directly linking a static library into another static library is meaningless. dll”. / cmake --build . CMakeLists. I spent some time figuring out I’m looking for a way to have both the DLLs copied to the executable’s output directory (unit tests executable). Repository B creates a shared library that we have a relocatable package for. "I believe that this issue should remain so that it can be found in the search. cc. a and . exe / etc. The include directories and implib all work correctly, but trying to install the shared library (dll) fails with the following error: ins 指令 target_link_libraries() 用來指定某個 target 要和哪些程式庫連結，當連結的程式庫是另一個 target 時，CMake 會自動建立相依關係以確保建置順序正確。 下面這個例子 CMake 會替 MyProject 產生 myexec 和 mylib 兩個 target，並且在建立 myexec 時和 mylib 連結。 Beyond target_link_libraries(): Alternative Methods in CMake . dll depending on the OS. dll files). TARGET_RUNTIME_DLLSが使用可能か事前チェックする; 対象のDLLファイルが存在しないと cmake -e copy_if_different が構文エラーとなるため、そうしたケースでもConfigureが失敗しないようにする。 完整指南：使用 CMake 在 Windows 上创建和使用动态链接库 (DLL) 绝对可以。我们将深入细节，确保每个步骤都清晰无误，特别是在设置 CMake 配置、处理 DLL 和 . cpp Dependencies CMakeで実行形式を生成したい場合は、add_executable(実行ファイル名 ソースファイル名)で設定する。 # Add a target executable add_executable (${PROJ_NAME} ${PROJECT_SOURCE_DIR} /main. lib” corresponding to the “example. – Tsyvarev The only way to link resource files to exe or dll is by using borland linker ilink32. o [100%] Linking CXX executable program [100%] Built target program $ ls CMakeCache. When I switch to building with shared libraries, the main target “Xyce” will depend on the dynamic library libxyce. dll into a single build_results/bin folder in your top-level build folder. exe: error: no such file or directory: 'ws2editor/libws2editor. txt cmake_minimum_required (VERSION 3. And there's currently no way to get CARGO_TARGET_DIR in build. in my own solution, there is a shared library(. The buildsystem will have a dependency to re-link <target> if the library file changes. 6) project(test2) set(CMAKE_CXX_STANDARD 11) link_directories(C:\\Users\\Johny\\CLionProjects\\test2) set(SOURCE_FILES main. exe) built from my source and header files, and when executing that @bambo09 It’s a little hard understanding what you’re trying to describe - you’ve verbally described operations you are doing rather than presenting a simple concrete CMakeLists, for instance. 5k次。文章讲述了在CMake中链接静态库时遇到的问题，涉及路径设置、target_link_libraries的顺序以及依赖库的正确链接顺序。作者分享了解决依赖lib_acl和lib_acl_cpp顺序导致链接错误的经验，强调了完整路径和库依赖顺序的重要性。 It looks to me that you need to copy the DLLs you need in the folder of your binary. dll library at runtime, then either the library should be in system location or it should be in the same directory as executable itself. lib file in the target_link_directories, it works. txt file: cmake_minimum_required(VERSION 3. Chuck Atkins wrote > May others have mentioned the various different ways to address generating > import libraries. The problem with this is, quoting rust devs here: "Build scripts are intended to have a very scoped output (just in their OUT_DIR)". lib and . CMAKE_<LANG>_LINK_EXECUTABLE¶. lib to link against at compile time as you're trying to do. $ make Scanning dependencies of target program [ 50%] Building CXX object CMakeFiles/program. In this scenario, the file specifies OpenCV version 4. In src, my CMakeLists. So how can I get the CMake build on To use a dynamic link library (DLL) with CMake, you first need to locate the DLL file and include it in your CMake project. so, libxyce. A library target name: The generated link line will have the full path to the linkable library file associated with the target. lib, and . There are many question on Stack Overflow about copying . I thought it might be some other dependencies, so I tried creating a simple test program, but I couldn't get that to work either. " - This import library file (presumably the . The codes, of course, were from search engine and do not work actually. 13. Over the lifetime of CMake the handling of executables dependent on shared objects has been a continual subject of questions and confusion. There's a hacky function like one below to 这里的target_link_libraries用于指明需要链接那些库，buildDynamicLink是指buildDynamicLink. txt file: PROJECT("app1") ADD_LIBRARY(m SHARED m. cpp) target_link_libraries(main PRD_6. LNK1104:Can't open file Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog Here, we're telling CMake about the locations of both the . Over the lifetime of CMake the handling of executables dependent on shared objects has been a continual subject of questions and This way, both executable and dll will end up in yours_output_directory. 可见结果不变，这个代码是通用的，跨平台的。 在win10下，有： 可见产生了dll和lib，在ubuntu下只产生. Instead we allow the end user to set these variables in the top level executable. "Duplicate By the end of CMakeLists. For example, in a system where both dlls and static libs for the same library (e. exe or by inspecting your package manager if one was used. g. どうも、今までVC++書いてきていたので、ライブラリとかをビルドするときにCMakeとか使っていたものの、Visual StudioのおかげでmakefileとかCMakeListsなどは書かないで過ごしてきた人です。 ライブラリのdllにパスを通してから以下の3つを設定しますよね To use an external DLL in a CMake project, you first need to locate the DLL file and its corresponding header files. 121 1 1 silver How to tell CMake to link executable against In the dynamic world of software development, the ability to create and manage dynamic libraries is a crucial skill. > With Windows shared libraries, you have both a runtime component (. Double-check your installed version using a tool like opencv_version. You can build a static library and a second one and have your executable project linked against both, but it's not possible to link the first static library with the second library and then link them into the final executable. . dll文件. dll designed to be loaded at runtime, and no . so), but on Windows, it seems to be tricky. 此时预处理器定义为USE_DLL I am using CMake 3. dll (fmod if you need a concrete example), which is linked Open up a Windows Command prompt and change directory to the build folder of the Windows DLL project e. An example from which to crib would be 那么用 CMake 调试时，如果想要引用 动态链接库 ，需要怎么弄呢？ 需要在CMakeLists. However, MinGW, for example, is capable of linking to a binary file like on Ubuntu. lib here if you are using VS building system. This is easy enough to do using add_custom_command( TARGET exe POST_BUILD <COPY_CMD>) Where the You declared MyProjectLib as a shared library, so unless you exported all or part of the symbols of the library, you will only have a . 随便输入一个名字 4. Also to make a dll from code that was an executable you will at minimum have to modify your headers to If you don't want to include the full path, you can do. dll) and a executable(. exe and mylib. How do you get CMake to understand that a given shared-object file (esp. This works fine on Linux (of course with . [example root folder]\animallib_shared\build\ folder. Thanks. txt中进行设置。 1。设置头文件路径： include_directories(头文件路径) 2。设置lib路径. Next, you need to add the external library to your project by using the add_library command in your CMakeLists. lib when built in the debug configuration. lib文件而非buildDynamicLink. My CMake files look like this: Algo:. 0 with CMake support and meet the very similar situation, i. 前述したCMake関数copy_dlls_to_targetについて、以下の要件を追加したくなった。. This sort of a configuration, to my mind, should be quite common. mdiep kqxtu xvlw usgl jfzcjwjm gkjyw wubze hojw bgn nlfr kpjjf lpw vqdy qohrdq lzrjbjea