Trying to link with OpenSSL libraries in Windows

[azarubkin]

Hello!

I'm making a project which includes a statically linked library which in turn uses OpenSSL.
I have installed 32-bit OpenSSL from https://slproweb.com/products/Win32OpenSSL.html in default folder.
I have added to my static library pro file:

INCLUDEPATH += C:/OpenSSL-Win32/include
DEPENDPATH += C:/OpenSSL-Win32/include

I have added to my application pro file:

win32: LIBS += -L"C:/OpenSSL-Win32/lib/MinGW/" -leay32

I get:

C:\Qt\projects\build-config-Desktop_Qt_5_4_2_MinGW_32bit-Debug\common/../../config/common/QueryLogic.cpp:650: undefined reference to `AES_set_encrypt_key'
C:\Qt\projects\build-config-Desktop_Qt_5_4_2_MinGW_32bit-Debug\common/../../config/common/QueryLogic.cpp:651: undefined reference to `AES_encrypt'

If I change my application pro file to:

win32: LIBS += -L"C:/OpenSSL-Win32/lib/MinGW/" -llibeay32

I get:

C:/Qt/Tools/mingw491_32/bin/../lib/gcc/i686-w64-mingw32/4.9.1/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -llibeay32

But libeay32.a is there, in C:/OpenSSL-Win32/lib/MinGW/ folder. How do I link with OpenSSL in Windows?

Thanks!

[Leonardo]

Linkage is done from right to left. Maybe you're adding your static library after openssl. Put it before.

[SGaist]

Hi,

Do you also have libcrypto in your OpenSSL install ?

[Leonardo]

libcrypto is how it's called on unix systems. On Windows it's libeay32.

[JKSH]

@azarubkin said:

I have added to my application pro file:

win32: LIBS += -L"C:/OpenSSL-Win32/lib/MinGW/" -leay32

This works for me: LIBS += C:/OpenSSL-Win32/lib/libeay32.lib

[azarubkin]

@Leonardo said:

Linkage is done from right to left. Maybe you're adding your static library after openssl. Put it before.
Yes, you're right. Moving static library after openssl solved my issue.