NOTES.WIN

   1
   2  NOTES FOR THE WINDOWS PLATFORMS
   3  ===============================
   4
   5  [Notes for Windows CE can be found in INSTALL.WCE]
   6
   7  Requirement details for native (Visual C++) builds
   8  --------------------------------------------------
   9
  10  - You need Perl.  We recommend ActiveState Perl, available from
  11    http://www.activestate.com/ActivePerl.
  12    You also need the perl module Text::Template, available on CPAN.
  13    Please read README.PERL for more information.
  14
  15  - You need a C compiler.  OpenSSL has been tested to build with these:
  16
  17    * Visual C++
  18
  19  - Netwide Assembler, a.k.a. NASM, available from http://www.nasm.us,
  20    is required if you intend to utilize assembler modules. Note that NASM
  21    is the only supported assembler. The Microsoft provided assembler is NOT
  22    supported.
  23
  24
  25  Visual C++ (native Windows)
  26  ---------------------------
  27
  28  Installation directories
  29
  30  The default installation directories are derived from environment
  31  variables.
  32
  33  For VC-WIN32, the following defaults are use:
  34
  35      PREFIX:      %ProgramFiles(86)%\OpenSSL
  36      OPENSSLDIR:  %CommonProgramFiles(86)%\SSL
  37
  38  For VC-WIN32, the following defaults are use:
  39
  40      PREFIX:      %ProgramW6432%\OpenSSL
  41      OPENSSLDIR:  %CommonProgramW6432%\SSL
  42
  43  Should those environment variables not exist (on a pure Win32
  44  installation for examples), these fallbacks are used:
  45
  46      PREFIX:      %ProgramFiles%\OpenSSL
  47      OPENSSLDIR:  %CommonProgramFiles%\SSL
  48
  49
  50  GNU C (Cygwin)
  51  --------------
  52
  53  Cygwin implements a Posix/Unix runtime system (cygwin1.dll) on top of the
  54  Windows subsystem and provides a bash shell and GNU tools environment.
  55  Consequently, a make of OpenSSL with Cygwin is virtually identical to the
  56  Unix procedure.
  57
  58  To build OpenSSL using Cygwin, you need to:
  59
  60  * Install Cygwin (see http://cygwin.com/)
  61
  62  * Install Cygwin Perl and ensure it is in the path. Recall that
  63    as least 5.10.0 is required.
  64
  65  * Run the Cygwin bash shell
  66
  67  Apart from that, follow the Unix instructions in INSTALL.
  68
  69  NOTE: "make test" and normal file operations may fail in directories
  70  mounted as text (i.e. mount -t c:\somewhere /home) due to Cygwin
  71  stripping of carriage returns. To avoid this ensure that a binary
  72  mount is used, e.g. mount -b c:\somewhere /home.
  73
  74  It is also possible to create "conventional" Windows binaries that use
  75  the Microsoft C runtime system (msvcrt.dll or crtdll.dll) using MinGW
  76  development add-on for Cygwin. MinGW is supported even as a standalone
  77  setup as described in the following section. In the context you should
  78  recognize that binaries targeting Cygwin itself are not interchangeable
  79  with "conventional" Windows binaries you generate with/for MinGW.
  80
  81
  82  GNU C (MinGW/MSYS)
  83  ------------------
  84
  85  * Compiler and shell environment installation:
  86
  87    MinGW and MSYS are available from http://www.mingw.org/, both are
  88    required. Run the installers and do whatever magic they say it takes
  89    to start MSYS bash shell with GNU tools and matching Perl on its PATH.
  90    "Matching Perl" refers to chosen "shell environment", i.e. if built
  91    under MSYS, then Perl compiled for MSYS is highly recommended.
  92
  93    Alternativelly, one can use MSYS2 from http://msys2.github.io/,
  94    which includes MingW (32-bit and 64-bit).
  95
  96  * It is also possible to cross-compile it on Linux by configuring
  97    with './Configure --cross-compile-prefix=i386-mingw32- mingw ...'.
  98    Other possible cross compile prefixes include x86_64-w64-mingw32-
  99    and i686-w64-mingw32-.
 100
 101
 102  Linking your application
 103  ------------------------
 104
 105  This section applies to non-Cygwin builds.
 106
 107  If you link with static OpenSSL libraries then you're expected to
 108  additionally link your application with WS2_32.LIB, ADVAPI32.LIB,
 109  GDI32.LIB and USER32.LIB. Those developing non-interactive service
 110  applications might feel concerned about linking with the latter two,
 111  as they are justly associated with interactive desktop, which is not
 112  available to service processes. The toolkit is designed to detect in
 113  which context it's currently executed, GUI, console app or service,
 114  and act accordingly, namely whether or not to actually make GUI calls.
 115  Additionally those who wish to /DELAYLOAD:GDI32.DLL and /DELAYLOAD:USER32.DLL
 116  and actually keep them off service process should consider
 117  implementing and exporting from .exe image in question own
 118  _OPENSSL_isservice not relying on USER32.DLL.
 119  E.g., on Windows Vista and later you could:
 120
 121         __declspec(dllexport) __cdecl BOOL _OPENSSL_isservice(void)
 122         {   DWORD sess;
 123             if (ProcessIdToSessionId(GetCurrentProcessId(),&sess))
 124                 return sess==0;
 125             return FALSE;
 126         }
 127
 128  If you link with OpenSSL .DLLs, then you're expected to include into
 129  your application code small "shim" snippet, which provides glue between
 130  OpenSSL BIO layer and your compiler run-time. See the OPENSSL_Applink
 131  manual page for further details.