Compiling OpenSSL with MinGW

Qt 5 / QtWebkit can make use of OpenSSL, which MinGW distributions do not ship.

Pre-built packages

The Win32OpenSSL project [slproweb.com] provides pre-compiled libraries for both 32 and 64 bit. However, these depend on the Microsoft Visual C++ 2008 runtime being installed.

Compiling on your own

Requirements

MSYS command prompt (an sh shell + some UNIX tools, get it from http://sourceforge.net/projects/mingw/files/MSYS/Base/msys-core/msys-1.0.11/MSYS-1.0.11.exe/download?use_mirror=garr. It’s also an (optional) part of mingw.org installer.)
Perl
Working MinGW, or MinGW-w64 toolchain

How to build

Download latest OpenSSL from http://www.openssl.org/source (e.g. openssl-1.0.1c.tar.gz)
Start a MSYS command prompt (C:\msys\1.0\msys.bat)
Extract tar.gz using MSYS tar (and ignore the symlink warnings)
- don’t use 7zip or other apps, since they fail to set up any symlinks! tar will also complain about symlinks, but compilation will still succeed.

Check that gcc is in PATH, otherwise add it, e.g.

for MinGW (32 bit) do:

for MinGW-w64 do:

Compile & install:

Errors

If you run into

check out http://openssl.6102.n7.nabble.com/Compile-error-with-MinGW-w64-td36657.html

Use MSYS perl
or change crypto/perlasm/x86_64-xlate.pl as mentioned in the e-mail thread.

Using it

Add the bin, include, lib folders to your compilation environment, e.g. for cmd.exe:

When you now run Qt’s configure.exe openssl should be detected, and Qt links against the libraries.

Compiling OpenSSL with MinGW

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