winscp/libs/expat/win32/README.txt

Expat can be built on Windows in two ways:
  using MS Visual Studio .NET or Cygwin.

* Cygwin:
  This follows the Unix build procedures.

* MS Visual Studio 2013, 2015 and 2017:
  A solution file for Visual Studio 2013 is provided: expat.sln.
  The associated project files (*.vcxproj) reside in the appropriate
  project directories. This solution file can be opened in VS 2015 or VS 2017
  and should be upgraded automatically if VS 2013 is not also installed.
  Note: Tests have their own solution files.

* All MS C/C++ compilers:
  The output for all projects will be generated in the win32\bin
  directory, intermediate files will be located in project-specific
  subdirectories of win32\tmp.
  
* Creating MinGW dynamic libraries from MS VC++ DLLs:
  
  On the command line, execute these steps:
  pexports libexpat.dll > expat.def
  pexports libexpatw.dll > expatw.def
  dlltool -d expat.def -l libexpat.a
  dlltool -d expatw.def -l libexpatw.a
  
  The *.a files are mingw libraries.

* Special note about MS VC++ and runtime libraries:

  There are three possible configurations: using the
  single threaded or multithreaded run-time library,
  or using the multi-threaded run-time Dll. That is, 
  one can build three different Expat libraries depending
  on the needs of the application.

  Dynamic Linking:

  By default the Expat Dlls are built to link statically
  with the multi-threaded run-time library. 
  The libraries are named
  - libexpat(w).dll 
  - libexpat(w).lib (import library)
  The "w" indicates the UTF-16 version of the library.

  One rarely uses other versions of the Dll, but they can
  be built easily by specifying a different RTL linkage in
  the IDE on the C/C++ tab under the category Code Generation.

  Static Linking:

  The libraries should be named like this:
  Single-theaded:     libexpat(w)ML.lib
  Multi-threaded:     libexpat(w)MT.lib
  Multi-threaded Dll: libexpat(w)MD.lib
  The suffixes conform to the compiler switch settings
  /ML, /MT and /MD for MS VC++.
  
  Note: In Visual Studio 2005 (Visual C++ 8.0) and later, the
  single-threaded runtime library is not supported anymore.

  By default, the expat-static and expatw-static projects are set up
  to link statically against the multithreaded run-time library,
  so they will build libexpatMT.lib or libexpatwMT.lib files.

  To build the other versions of the static library, 
  go to Project - Settings:
  - specify a different RTL linkage on the C/C++ tab
    under the category Code Generation.
  - then, on the Library tab, change the output file name
    accordingly, as described above

  An application linking to the static libraries must
  have the global macro XML_STATIC defined.