CODEWITHSUNDEEP
opencvqt5dll
user957121
user957121

Reputation: 3066

libgcc_s_dw2-1.dll is missing making OpenCV and Qt 5 program is unable to start

My project needs opencv library 2.3 and I'm using Qt 5.0.1. However, after building, the program won't start. I tried the Dependency Walker and added all Qt's dlls from C:\Qt\Qt5.0.1\5.0.1\mingw47_32\bin except libgcc_s_dw2-2.dll, which I couldn't find in my computer. The Dependency Walker says that libgcc_s_dw2-1.dll is needed by some opencv dlls such as libopencv_core230.dll. I tried the dll provided here, but got an error about the program couldn't locate the input entrance __gxx_personality_v0 on libopencv_imgproc230.dll. Any advices? :)

I've added the statement 

QMAKE_LFLAGS += -static -static-libgcc -static-libstdc++ -lpthread

into .pro file, not work :(

Upvotes: 0

Views: 2935

Answers (2)

aSproot
aSproot

Reputation: 1

If it don't work, try using .lib from "vc9" directory.

Upvotes: 0

user957121
user957121

Reputation: 3066

Finally, get it work.

The statement above is wrong since -lpthread is 'no use'. I changed it to this one:

QMAKE_LFLAGS += -static-libgcc -static-libstdc++

It seems that -lpthread should be used with -static next to it, ie. -static -lpthread. However, this will cause another problem that the compiler can't find opencv libs. So I just remove them and add libpthread-1.dll to the .exe folder.

Many thanks to this post.

Upvotes: 1

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