2 INSTALLATION ON THE WIN32 PLATFORM
3 ----------------------------------
5 Heres a few comments about building OpenSSL in Windows environments. Most of
6 this is tested on Win32 but it may also work in Win 3.1 with some
9 You need Perl for Win32 (available from http://www.activestate.com/ActivePerl)
10 and one of the following C compilers:
14 * GNU C (Mingw32 or Cygwin32)
16 If you want to compile in the assembly language routines with Visual C++ then
17 you will need an assembler. This is worth doing because it will result in
18 faster code: for example it will typically result in a 2 times speedup in the
19 RSA routines. Currently the following assemblers are supported:
21 * Microsoft MASM (aka "ml")
22 * Free Netwide Assembler NASM.
24 MASM was at one point distributed with VC++. It is now distributed with some
25 Microsoft DDKs, for example the Windows NT 4.0 DDK and the Windows 98 DDK. If
26 you do not have either of these DDKs then you can just download the binaries
27 for the Windows 98 DDK and extract and rename the two files XXXXXml.exe and
28 XXXXXml.err, to ml.exe and ml.err and install somewhere on your PATH. Both
29 DDKs can be downloaded from the Microsoft developers site www.msdn.com.
31 NASM is freely available. Version 0.98 was used during testing: other versions
32 may also work. It is available from many places, see for example:
33 http://www.kernel.org/pub/software/devel/nasm/binaries/win32/
34 The NASM binary nasmw.exe needs to be installed anywhere on your PATH.
36 If you are compiling from a tarball or a CVS snapshot then the Win32 files
37 may well be not up to date. This may mean that some "tweaking" is required to
38 get it all to work. See the trouble shooting section later on for if (when?)
44 Firstly you should run Configure:
46 > perl Configure VC-WIN32
48 Next you need to build the Makefiles and optionally the assembly language
51 - If you are using MASM then run:
55 - If you are using NASM then run:
59 - If you don't want to use the assembly language files at all then run:
63 If you get errors about things not having numbers assigned then check the
64 troubleshooting section: you probably won't be able to compile it as it
67 Then from the VC++ environment at a prompt do:
69 > nmake -f ms\ntdll.mak
71 If all is well it should compile and you will have some DLLs and executables
72 in out32dll. If you want to try the tests then do:
79 There are various changes you can make to the Win32 compile environment. By
80 default the library is not compiled with debugging symbols. If you add 'debug'
81 to the mk1mk.pl lines in the do_* batch file then debugging symbols will be
84 The default Win32 environment is to leave out any Windows NT specific
87 If you want to enable the NT specific features of OpenSSL (currently only the
88 logging BIO) follow the instructions above but call the batch file do_nt.bat
91 You can also build a static version of the library using the Makefile
94 Borland C++ builder 3 and 4
95 ---------------------------
97 * Setup PATH. First must be GNU make then bcb4/bin
107 To build OpenSSL, you need the Mingw32 package and GNU make.
109 * Compiler installation:
111 Mingw32 is available from <ftp://ftp.xraylith.wisc.edu/pub/khan/gnu-win32/
112 mingw32/egcs-1.1.2/egcs-1.1.2-mingw32.zip>. GNU make is at
113 <ftp://agnes.dida.physik.uni-essen.de/home/janjaap/mingw32/binaries/
114 make-3.76.1.zip>. Install both of them in C:\egcs-1.1.2 and run
115 C:\egcs-1.1.2\mingw32.bat to set the PATH.
121 This will create the library and binaries in out. In case any problems
126 libcrypto.a and libssl.a are the static libraries. To use the DLLs,
127 link with libeay32.a and libssl32.a instead.
129 See troubleshooting if you get error messages about functions not having
132 * You can now try the tests:
140 Since the Win32 build is only occasionally tested it may not always compile
141 cleanly. If you get an error about functions not having numbers assigned
142 when you run ms\do_ms then this means the Win32 ordinal files are not up to
145 > perl util\mkdef.pl crypto ssl update
147 then ms\do_XXX should not give a warning any more. However the numbers that
148 get assigned by this technique may not match those that eventually get
149 assigned in the CVS tree: so anything linked against this version of the
150 library may need to be recompiled.
152 If you get errors about unresolved symbols there are several possible
155 If this happens when the DLL is being linked and you have disabled some
156 ciphers then it is possible the DEF file generator hasn't removed all
157 the disabled symbols: the easiest solution is to edit the DEF files manually
158 to delete them. The DEF files are ms\libeay32.def ms\ssleay32.def.
160 Another cause is if you missed or ignored the errors about missing numbers
163 If you get warnings in the code then the compilation will halt.
165 The default Makefile for Win32 halts whenever any warnings occur. Since VC++
166 has its own ideas about warnings which don't always match up to other
167 environments this can happen. The best fix is to edit the file with the
168 warning in and fix it. Alternatively you can turn off the halt on warnings by
169 editing the CFLAG line in the Makefile and deleting the /WX option.
171 You might get compilation errors. Again you will have to fix these or report
174 One final comment about compiling applications linked to the OpenSSL library.
175 If you don't use the multithreaded DLL runtime library (/MD option) your
176 program will almost certainly crash because malloc gets confused -- the
177 OpenSSL DLLs are statically linked to one version, the application must
178 not use a different one. You might be able to work around such problems
179 by adding CRYPTO_malloc_init() to your program before any calls to the
180 OpenSSL libraries: This tells the OpenSSL libraries to use the same
181 malloc(), free() and realloc() as the application. However there are many
182 standard library functions used by OpenSSL that call malloc() internally
183 (e.g. fopen()), and OpenSSL cannot change these; so in general you cannot
184 rely on CYRPTO_malloc_init() solving your problem, and you should
185 consistently use the multithreaded library.