Move _WIN32_WINNT definition from command line to e_os.h. The change is

[openssl.git] / e_os.h

diff --git a/e_os.h b/e_os.h
index 3ff9f3cd1c4ce2f2816d6d0789b3860846d49043..cf76632b1e07c025bed8154db81da8e3aa110189 100644 (file)
--- a/e_os.h
+++ b/e_os.h
@@ -235,6 +235,23 @@ extern "C" {
 #  define NO_DIRENT
 
 #  ifdef WINDOWS
+#    ifndef _WIN32_WINNT
+       /*
+       * Defining _WIN32_WINNT here in e_os.h implies certain "discipline."
+       * Most notably we ought to check for availability of each specific
+       * routine with GetProcAddress() and/or quard NT-specific calls with
+       * GetVersion() < 0x80000000. One can argue that in latter "or" case
+       * we ought to /DELAYLOAD some .DLLs in order to protect ourselves
+       * against run-time link errors. This doesn't seem to be necessary,
+       * because it turned out that already Windows 95, first non-NT Win32
+       * implementation, is equipped with at least NT 3.51 stubs, dummy
+       * routines with same name, but which do nothing. Meaning that it's
+       * apparently appropriate to guard generic NT calls with GetVersion
+       * alone, while NT 4.0 and above calls ought to be additionally
+       * checked upon with GetProcAddress.
+       */
+#      define _WIN32_WINNT 0x0400
+#    endif
 #    include <windows.h>
 #    include <stddef.h>
 #    include <errno.h>