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Extentions of the explanations to the linking problem on Win32. Provided by Andrew Gray <agray@iconsinc.com>

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Richard Levitte
2001-11-19 20:46:35 +00:00
parent a7ce69dbd7
commit a542db90c6
1 changed files with 37 additions and 4 deletions
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41
FAQ
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@@ -467,10 +467,43 @@ OpenSSL. This is described in the threads(3) manpage.
* I've compiled a program under Windows and it crashes: why?
This is usually because you've missed the comment in INSTALL.W32. You
must link with the multithreaded DLL version of the VC++ runtime library
otherwise the conflict will cause a program to crash: typically on the
first BIO related read or write operation.
This is usually because you've missed the comment in INSTALL.W32.
Your application must link against the same version of the Win32
C-Runtime against which your openssl libraries were linked. The
default version for OpenSSL is /MD - "Multithreaded DLL".
If you are using Microsoft Visual C++'s IDE (Visual Studio), in
many cases, your new project most likely defaulted to "Debug
Singlethreaded" - /ML. This is NOT interchangeable with /MD and your
program will crash, typically on the first BIO related read or write
operation.
For each of the six possible link stage configurations within Win32,
your application must link against the same by which OpenSSL was
built. If you are using MS Visual C++ (Studio) this can be changed
by:
1. Select Settings... from the Project Menu.
2. Select the C/C++ Tab.
3. Select "Code Generation from the "Category" drop down list box
4. Select the Appropriate library (see table below) from the "Use
run-time library" drop down list box. Perform this step for both
your debug and release versions of your application (look at the
top left of the settings panel to change between the two)
Single Threaded /ML - MS VC++ often defaults to
this for the release
version of a new project.
Debug Single Threaded /MLd - MS VC++ often defaults to
this for the debug version
of a new project.
Multithreaded /MT
Debug Multithreaded /MTd
Multithreaded DLL /MD - OpenSSL defaults to this.
Debug Multithreaded DLL /MDd
Note that debug and release libraries are NOT interchangeable. If you
built OpenSSL with /MD your application must use /MD and cannot use /MDd.
* How do I read or write a DER encoded buffer using the ASN1 functions?