"LNK1104: cannot open file mclmcrrtd.lib" Error in Qt Creator-CodePudding

I generated *.dll dynamic-link library file by compiling the application I developed in MATLAB using MRC (MATLAB Runtime Compiler). I'm using the MSVC compiler and qmake toolset in the Qt Creator environment to distribute and/or use the procedures in the application I developed in MATLAB in the Windows OS environment. But I'm having trouble adding the dynamic-link libraries (for example mclmcrrt.lib, libmx.lib, libmex.lib, libmat.lib, libfixedpoint.lib, etc.) shared by the MATLAB Runtime Compiler to my project. When I build the project in the Qt Creator environment, I get the following error:

* LNK1104: cannot open file 'mclmcrrtd.lib'

* U1077: "\VS\Tools\MSVC\{Version}\bin\HostX86\x64\link.EXE": return code '0x450'

* U1077: "\VS\Tools\MSVC\{Version}\bin\HostX86\x64\nmake.exe": return code '0x2'

How do I solve this problem?

CodePudding user response：

1. Definition of Error

I tested this bug by starting a similar project. When I compile the project in Qt Creator I got the following error:

LNK1104: cannot open file 'mclmcrrtd.lib'

2. Steps To Fix The Error

Follow the steps below to fix the problem:

I didn't add dependencies manually in QT Creator. I added a dynamic library by right-clicking on the project name and going to Add Library > External Library. I used the following settings in the External Library window in QT Creator, I added files and directories using these settings:

 * Linkage: Dynamic
 * Mac: Library

 * [✔] Library inside "debug" or "release" subfolder
 * [ ] Add "d" suffix for debug version
 * [ ] Remove "d" suffix for release version

I examined how the window opened in the second step transfers information about the dynamic library to the *.pro file. I selected the mclmcrrt.lib file in the ~/lib/win64/ directory and clicked the Next button in the External Library window on Qt Creator. I saw that the mclmcrrt.lib library was named differently in Win32, Win64 and Unix systems when imported to Qt Creator in this way (like lmclmcrrt, lmclmcrrtd, lmclmcrrt).

win32:CONFIG(release, debug|release): LIBS  = -L$$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft/' -lmclmcrrt
else:win32:CONFIG(release, debug|release): LIBS  = -L$$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft/' -lmclmcrrtd
else:unix: LIBS  = -L$$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft/' -lmclmcrrt

INCLUDEPATH  = $$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft'
DEPENDPATH  = $$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft'

This is how I learned how to properly import files and directories into my project file. I added all the requirements manually myself; I didn't use the interface to avoid file and directory confusion.

win32:CONFIG(release, debug|release): LIBS  = -L$$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft/' -lmclmcrrt
else:win32:CONFIG(release, debug|release): LIBS  = -L$$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft/' -lmclmcrrtd
else:unix: LIBS  = -L$$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft/' -lmclmcrrt

INCLUDEPATH  = $$PWD/'../../../../Program Files/MATLAB/R2018B/extern/include'
INCLUDEPATH  = $$PWD/'../../../../Program Files/MATLAB/R2018B/extern/include/win64'
INCLUDEPATH  = $$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft'
DEPENDPATH  = $$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft'

When using the Build > Rebuild All Projects command in Qt Creator to compile the project, I got the error LNK1104: Cannot open file 'mclmcrrtd.lib' again. I found out that this is because the old MATLAB Compiler Runtime (MCR) is only suitable for x86 architecture. For this reason, I discovered that many sample QT-Matlab Compiler Runtime projects on the internet use the win32 tag in the descriptions in *.pro files. However, I thought it would not be correct to use the win32 tag because of the phrase HostX64\x64 when called from the C:\Program Files(x86)\Microsoft Visual Studio\2019\Community\VC\Tools\MSVC\{Version}\bin\HostX64\x64\cl.exe directory of the current MSVC. The final configuration in the *.pro file containing the relevant code block is as follows and successfully

LIBS  = -L$$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft/' -lmclmcrrt
INCLUDEPATH  = $$PWD/'../../../../Program Files/MATLAB/R2018B/extern/include'
INCLUDEPATH  = $$PWD/'../../../../Program Files/MATLAB/R2018B/extern/include/win64'
INCLUDEPATH  = $$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft'
DEPENDPATH  = $$PWD/'../../../../Program Files/MATLAB/R2018B/extern/lib/win64/microsoft'

1. Definition of Error

2. Steps To Fix The Error

3. Resources