Incompatible MSVCRT.dll

[ahmdsd_ostora]

I have this error message when running my Windows 7 compiled application on a Windows xp platform:

"The procedure entry point _ftol2_sse cannot be found in the library msvcrt.dll"

what should the fix be?

[squidge]

Use the appropriate version of msvcrt.dll for your app.

[ahmdsd_ostora]

Use the appropriate version of msvcrt.dll for your app.

I don't understand this.

should I overwrite the msvcrt.dll in the system32 folder?, if so, why my installer cannot edit anything in the system32 folder?

[squidge]

No, put it in the same folder as your executable.

[ahmdsd_ostora]

i did your solution but no luck.

I solved this problem by removing any system library from my installer except libgcc_s_dw2-1.dll

[squidge]

You should check the license before putting any dll into your installer. For example, msvcrt is a Microsoft library and they require that you distribute the "Microsoft Visual C++ Runtime Redistributable" rather than random DLLs.

[ahmdsd_ostora]

what will be the harm if I ignored the license?

[squidge]

what will be the harm if I ignored the license?

Worse case? You get sued.
Best case? They don't notice your app and so leave you alone.

You should read the case against Christian Ghisler, who did a shareware app called Windows Commander. It was years before he received a cease and desist order from Microsoft, as they didn't like him using the name "Windows" in his software. Rather than going to court, he just changed the name (which, for a popular program, can be a complete nightmare - it's not exactly a simple recompile)

[ahmdsd_ostora]

thanks for information.

[marcvanriet]

Hello,

Had a similar issue some time ago. I think you have two options :
1) install the "Microsoft Visual C++ Runtime Redistributable" on your target PC (it can be downloaded from MS the website)
2) build a fully static application

Building a fully static application requires you to rebuild Qt as a 'static' build. For MingW, there still is a dependency on some mingw DLL. For VS, you have to make changes to the qmake.conf file in your mkspecs directory ( change the MD compiler flag to MT, and add /NODEFAULTLIB:”MSVCRT” to the linker flags).

After several rebuilds and searching a lot of forums, I now finally have a standalone .EXE that I can just copy onto another PC

Best regards,
Marc

[squidge]

Don't forget static applications have different licensing requirements than dynamic ones. A lot of people seem to forget this.