Otherwise Curl_gethostname always fails. Windows has gethostname
since Vista according to
http://msdn.microsoft.com/en-us/library/ms738527%28VS.85%29.aspx, but
accordings to byte_bucket's VC 2005 documentation, it is available even
in Windows 95. (possibly after installing a Platform SDK, the
Windows Server 2003 SP1 Platform SDK should be sufficient).

Signed-off-by: Peter Wu <peter_at_lekensteyn.nl>

---
 CMake/Platforms/WindowsCache.cmake | 1 +
 CMakeLists.txt                     | 2 ++
 2 files changed, 3 insertions(+)
diff --git a/CMake/Platforms/WindowsCache.cmake b/CMake/Platforms/WindowsCache.cmake
index 53d1c6d..6fc2991 100644
--- a/CMake/Platforms/WindowsCache.cmake
+++ b/CMake/Platforms/WindowsCache.cmake
@@ -5,6 +5,7 @@ if(NOT UNIX)
     set(HAVE_LIBSOCKET 0)
     set(NOT_NEED_LIBNSL 0)
     set(HAVE_LIBNSL 0)
+    set(HAVE_GETHOSTNAME 1)
     set(HAVE_LIBZ 0)
     set(HAVE_LIBCRYPTO 0)
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 45f46ec..a325d1c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -252,6 +252,8 @@ if(NOT NOT_NEED_LIBNSL)
   check_library_exists_concat("nsl"    gethostbyname  HAVE_LIBNSL)
 endif(NOT NOT_NEED_LIBNSL)
 
+check_function_exists(gethostname HAVE_GETHOSTNAME)
+
 if(WIN32)
   check_library_exists_concat("ws2_32" getch        HAVE_LIBWS2_32)
   check_library_exists_concat("winmm"  getch        HAVE_LIBWINMM)
-- 
2.1.2
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