如何从.dll调用.exe中的函数(How do I call functions in an .exe from a .dll)

我有一个动态加载共享库的主可执行文件，两者都在同一个CMake文件中编译。该库调用主可执行文件中定义的函数，在Linux中这已成功完成并且程序按预期工作，但是在Windows中，库无法链接可执行文件和程序在编译期间崩溃。

我正在使用这个cmake文件构建一个可执行文件和一个库，我从我在这里找到的Unix版本修改过。

CMAKE_MINIMUM_REQUIRED(VERSION 2.8 FATAL_ERROR) PROJECT(EXPORTS C) SET(CMAKE_VERBOSE_MAKEFILE ON) SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "") FILE(WRITE ${CMAKE_BINARY_DIR}/main.c "#include <windows.h> #include <stdio.h> void internal(void){printf(\"internal()\\n\");} int main(void) { HMODULE plugin_library = LoadLibrary (\"./plugin.dll\"); FARPROC initizer = GetProcAddress(plugin_library, \"external\"); initizer(); }\n") ADD_EXECUTABLE(main main.c) target_link_libraries(main ${CMAKE_DL_LIBS}) SET_TARGET_PROPERTIES(main PROPERTIES ENABLE_EXPORTS TRUE) FILE(WRITE ${CMAKE_BINARY_DIR}/plugin.c "void external(void){internal();}\n") ADD_LIBRARY(plugin MODULE plugin.c) TARGET_LINK_LIBRARIES(plugin main)

当我尝试构建程序时，我得到这个输出，它会抛出错误fatal error U1073: don't know how to make 'main.lib' 。

C:\Users\User\Desktop\linkingdemo\build>nmake Microsoft (R) Program Maintenance Utility Version 14.00.23026.0 Copyright (C) Microsoft Corporation. All rights reserved. "C:\Program Files\CMake\bin\cmake.exe" -HC:\Users\User\Desktop\linkingdemo -BC:\Users\User\Desktop\linkingdemo\build --check-build-system CMakeFiles\Makefile.cmake 0 "C:\Program Files\CMake\bin\cmake.exe" -E cmake_progress_start C:\Users\User\Desktop\linkingdemo\build\CMakeFiles C:\Users\User\Desktop\linkingdemo\build\CMakeFiles\progress.marks "C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f CMakeFiles\Makefile2 /nologo - all "C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f CMakeFiles\main.dir\build.make /nologo -L CMakeFiles\main.dir\depend "C:\Program Files\CMake\bin\cmake.exe" -E cmake_depends "NMake Makefiles" C:\Users\User\Desktop\linkingdemo C:\Users\User\Desktop\linkingdemo C:\Users\User\Desktop\linkingdemo\build C:\Users\User\Desktop\linkingdemo\build C:\Users\User\Desktop\linkingdemo\build\CMakeFiles\main.dir\DependInfo.cmake --color= Scanning dependencies of target main "C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f CMakeFiles\main.dir\build.make /nologo -L CMakeFiles\main.dir\build "C:\Program Files\CMake\bin\cmake.exe" -E cmake_progress_report C:\Users\User\Desktop\linkingdemo\build\CMakeFiles 1 [ 50%] Building C object CMakeFiles/main.dir/main.c.obj C:\PROGRA~1\MICROS~1.0\VC\bin\cl.exe @C:\Users\User\AppData\Local\Temp\nm3E0E.tmp main.c Linking C executable main.exe "C:\Program Files\CMake\bin\cmake.exe" -E vs_link_exe C:\PROGRA~1\MICROS~1.0\VC\bin\link.exe /nologo @CMakeFiles\main.dir\objects1.rsp @C:\Users\User\AppData\Local\Temp\nm3FE4.tmp "C:\Program Files\CMake\bin\cmake.exe" -E cmake_progress_report C:\Users\User\Desktop\linkingdemo\build\CMakeFiles 1 [ 50%] Built target main "C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f CMakeFiles\plugin.dir\build.make /nologo -L CMakeFiles\plugin.dir\depend "C:\Program Files\CMake\bin\cmake.exe" -E cmake_depends "NMake Makefiles" C:\Users\User\Desktop\linkingdemo C:\Users\User\Desktop\linkingdemo C:\Users\User\Desktop\linkingdemo\build C:\Users\User\Desktop\linkingdemo\build C:\Users\User\Desktop\linkingdemo\build\CMakeFiles\plugin.dir\DependInfo.cmake --color= Scanning dependencies of target plugin "C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f CMakeFiles\plugin.dir\build.make /nologo -L CMakeFiles\plugin.dir\build "C:\Program Files\CMake\bin\cmake.exe" -E cmake_progress_report C:\Users\User\Desktop\linkingdemo\build\CMakeFiles 2 [100%] Building C object CMakeFiles/plugin.dir/plugin.c.obj C:\PROGRA~1\MICROS~1.0\VC\bin\cl.exe @C:\Users\User\AppData\Local\Temp\nm43BB.tmp plugin.c C:\Users\User\Desktop\linkingdemo\build\plugin.c(1): warning C4013: 'internal' undefined; assuming extern returning int NMAKE : fatal error U1073: don't know how to make 'main.lib' Stop. NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe"' : return code '0x2' Stop.NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe"' : return code '0x2' Stop.

如何让这个程序在Windows上正常工作？

I have a main executable that dynamically loads a shared library, both are compiled in the same CMake file. The library calls a function defined in the main executable, in Linux this is done successfully and the program works as expected, however in Windows the library fails to link the executable and the program crashes during compilation.

I am using this cmake file to construct an executable and a library that I modified from the Unix version I found here.

CMAKE_MINIMUM_REQUIRED(VERSION 2.8 FATAL_ERROR) PROJECT(EXPORTS C) SET(CMAKE_VERBOSE_MAKEFILE ON) SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "") FILE(WRITE ${CMAKE_BINARY_DIR}/main.c "#include <windows.h> #include <stdio.h> void internal(void){printf(\"internal()\\n\");} int main(void) { HMODULE plugin_library = LoadLibrary (\"./plugin.dll\"); FARPROC initizer = GetProcAddress(plugin_library, \"external\"); initizer(); }\n") ADD_EXECUTABLE(main main.c) target_link_libraries(main ${CMAKE_DL_LIBS}) SET_TARGET_PROPERTIES(main PROPERTIES ENABLE_EXPORTS TRUE) FILE(WRITE ${CMAKE_BINARY_DIR}/plugin.c "void external(void){internal();}\n") ADD_LIBRARY(plugin MODULE plugin.c) TARGET_LINK_LIBRARIES(plugin main)

When I try to build the program I get this output which throws the error fatal error U1073: don't know how to make 'main.lib'.

C:\Users\User\Desktop\linkingdemo\build>nmake Microsoft (R) Program Maintenance Utility Version 14.00.23026.0 Copyright (C) Microsoft Corporation. All rights reserved. "C:\Program Files\CMake\bin\cmake.exe" -HC:\Users\User\Desktop\linkingdemo -BC:\Users\User\Desktop\linkingdemo\build --check-build-system CMakeFiles\Makefile.cmake 0 "C:\Program Files\CMake\bin\cmake.exe" -E cmake_progress_start C:\Users\User\Desktop\linkingdemo\build\CMakeFiles C:\Users\User\Desktop\linkingdemo\build\CMakeFiles\progress.marks "C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f CMakeFiles\Makefile2 /nologo - all "C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f CMakeFiles\main.dir\build.make /nologo -L CMakeFiles\main.dir\depend "C:\Program Files\CMake\bin\cmake.exe" -E cmake_depends "NMake Makefiles" C:\Users\User\Desktop\linkingdemo C:\Users\User\Desktop\linkingdemo C:\Users\User\Desktop\linkingdemo\build C:\Users\User\Desktop\linkingdemo\build C:\Users\User\Desktop\linkingdemo\build\CMakeFiles\main.dir\DependInfo.cmake --color= Scanning dependencies of target main "C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f CMakeFiles\main.dir\build.make /nologo -L CMakeFiles\main.dir\build "C:\Program Files\CMake\bin\cmake.exe" -E cmake_progress_report C:\Users\User\Desktop\linkingdemo\build\CMakeFiles 1 [ 50%] Building C object CMakeFiles/main.dir/main.c.obj C:\PROGRA~1\MICROS~1.0\VC\bin\cl.exe @C:\Users\User\AppData\Local\Temp\nm3E0E.tmp main.c Linking C executable main.exe "C:\Program Files\CMake\bin\cmake.exe" -E vs_link_exe C:\PROGRA~1\MICROS~1.0\VC\bin\link.exe /nologo @CMakeFiles\main.dir\objects1.rsp @C:\Users\User\AppData\Local\Temp\nm3FE4.tmp "C:\Program Files\CMake\bin\cmake.exe" -E cmake_progress_report C:\Users\User\Desktop\linkingdemo\build\CMakeFiles 1 [ 50%] Built target main "C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f CMakeFiles\plugin.dir\build.make /nologo -L CMakeFiles\plugin.dir\depend "C:\Program Files\CMake\bin\cmake.exe" -E cmake_depends "NMake Makefiles" C:\Users\User\Desktop\linkingdemo C:\Users\User\Desktop\linkingdemo C:\Users\User\Desktop\linkingdemo\build C:\Users\User\Desktop\linkingdemo\build C:\Users\User\Desktop\linkingdemo\build\CMakeFiles\plugin.dir\DependInfo.cmake --color= Scanning dependencies of target plugin "C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe" -f CMakeFiles\plugin.dir\build.make /nologo -L CMakeFiles\plugin.dir\build "C:\Program Files\CMake\bin\cmake.exe" -E cmake_progress_report C:\Users\User\Desktop\linkingdemo\build\CMakeFiles 2 [100%] Building C object CMakeFiles/plugin.dir/plugin.c.obj C:\PROGRA~1\MICROS~1.0\VC\bin\cl.exe @C:\Users\User\AppData\Local\Temp\nm43BB.tmp plugin.c C:\Users\User\Desktop\linkingdemo\build\plugin.c(1): warning C4013: 'internal' undefined; assuming extern returning int NMAKE : fatal error U1073: don't know how to make 'main.lib' Stop. NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe"' : return code '0x2' Stop.NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio 14.0\VC\BIN\nmake.exe"' : return code '0x2' Stop.

How do I get to get this program to work correctly on Windows?

最满意答案

它出现在Windows中，您必须在远程库可以访问的所有函数上指定__declspec(dllexport) 。我已将它添加到需要由外部库运行的每个函数中，程序现在可以正常工作。

CMAKE_MINIMUM_REQUIRED(VERSION 2.8 FATAL_ERROR) PROJECT(EXPORTS C) SET(CMAKE_VERBOSE_MAKEFILE ON) SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "") FILE(WRITE ${CMAKE_BINARY_DIR}/main.c "#include <windows.h> #include <stdio.h> __declspec(dllexport) void internal(void){printf(\"internal()\\n\");} int main(void) { HMODULE plugin_library = LoadLibrary (\"./plugin.dll\"); FARPROC initizer = GetProcAddress(plugin_library, \"external\"); initizer(); }\n") ADD_EXECUTABLE(main main.c) target_link_libraries(main ${CMAKE_DL_LIBS}) SET_TARGET_PROPERTIES(main PROPERTIES ENABLE_EXPORTS TRUE) FILE(WRITE ${CMAKE_BINARY_DIR}/plugin.c "__declspec(dllexport) void external(void){internal();}\n") ADD_LIBRARY(plugin MODULE plugin.c) TARGET_LINK_LIBRARIES(plugin main)

使用Visual Studio 2015使用以下命令构建并运行此程序

cmake -G "NMake Makefiles" .. nmake main.exe

并打印

internal()

It appears in Windows you must specify__declspec(dllexport) on all of the functions that can be accessed by a remote library. I have added it to each of the functions that need to be run by an external library and the program now works correctly.

CMAKE_MINIMUM_REQUIRED(VERSION 2.8 FATAL_ERROR) PROJECT(EXPORTS C) SET(CMAKE_VERBOSE_MAKEFILE ON) SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "") FILE(WRITE ${CMAKE_BINARY_DIR}/main.c "#include <windows.h> #include <stdio.h> __declspec(dllexport) void internal(void){printf(\"internal()\\n\");} int main(void) { HMODULE plugin_library = LoadLibrary (\"./plugin.dll\"); FARPROC initizer = GetProcAddress(plugin_library, \"external\"); initizer(); }\n") ADD_EXECUTABLE(main main.c) target_link_libraries(main ${CMAKE_DL_LIBS}) SET_TARGET_PROPERTIES(main PROPERTIES ENABLE_EXPORTS TRUE) FILE(WRITE ${CMAKE_BINARY_DIR}/plugin.c "__declspec(dllexport) void external(void){internal();}\n") ADD_LIBRARY(plugin MODULE plugin.c) TARGET_LINK_LIBRARIES(plugin main)

This program was built and run using the following commands using Visual Studio 2015

cmake -G "NMake Makefiles" .. nmake main.exe

and printed

internal()

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