From beaea73fa0ffbd5f2fbc839e9c9135f9bc0b3280 Mon Sep 17 00:00:00 2001
From: Bill Hoffman <bill.hoffman@kitware.com>
Date: Fri, 16 Nov 2007 14:06:40 -0500
Subject: [PATCH] ENH: add a try compile for va_copy

---
 Utilities/cmxmlrpc/CMakeLists.txt     |  2 ++
 Utilities/cmxmlrpc/xmlrpc_config.h.in |  2 ++
 Utilities/cmxmlrpc/xmlrpc_data.c      | 10 +++++++---
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/Utilities/cmxmlrpc/CMakeLists.txt b/Utilities/cmxmlrpc/CMakeLists.txt
index a29e0bd58..e3f42c839 100644
--- a/Utilities/cmxmlrpc/CMakeLists.txt
+++ b/Utilities/cmxmlrpc/CMakeLists.txt
@@ -44,6 +44,8 @@ INCLUDE (TryCompileFromSource)
 SET(HEADER_INCLUDES "${CURRENT_INCLUDES}")
 TRY_COMPILE_FROM_SOURCE("va_list list1, list2; list1 = list2"
   VA_LIST_ISNOT_ARRAY_DEFINE)
+TRY_COMPILE_FROM_SOURCE("va_list list1, list2; va_copy(list1, list2);"
+  HAS_VA_COPY)
 SET(VA_LIST_IS_ARRAY_DEFINE 0)
 IF(NOT VA_LIST_ISNOT_ARRAY_DEFINE)
   SET(VA_LIST_IS_ARRAY_DEFINE 1)
diff --git a/Utilities/cmxmlrpc/xmlrpc_config.h.in b/Utilities/cmxmlrpc/xmlrpc_config.h.in
index d940e4dcc..9683c1e69 100644
--- a/Utilities/cmxmlrpc/xmlrpc_config.h.in
+++ b/Utilities/cmxmlrpc/xmlrpc_config.h.in
@@ -22,6 +22,8 @@
 
 #define VA_LIST_IS_ARRAY @VA_LIST_IS_ARRAY_DEFINE@
 
+#cmakedefine HAS_VA_COPY @HAS_VA_COPY@
+
 #define HAVE_LIBWWW_SSL @HAVE_LIBWWW_SSL_DEFINE@
 
 #define ATTR_UNUSED @ATTR_UNUSED@
diff --git a/Utilities/cmxmlrpc/xmlrpc_data.c b/Utilities/cmxmlrpc/xmlrpc_data.c
index 0d3c3cad6..456d8e487 100644
--- a/Utilities/cmxmlrpc/xmlrpc_data.c
+++ b/Utilities/cmxmlrpc/xmlrpc_data.c
@@ -24,10 +24,14 @@ typedef double va_double;
 ** tricky fashions. We don't why Python does this, but since we're
 ** abusing our va_list objects in a similar fashion, we'll copy them
 ** too. */
-#if VA_LIST_IS_ARRAY
-#define VA_LIST_COPY(dest,src) memcpy((dest), (src), sizeof(va_list))
+#ifdef HAS_VA_COPY
+#  define VA_LIST_COPY(dest,src) va_copy((dest), (src))
 #else
-#define VA_LIST_COPY(dest,src) ((dest) = (src))
+#  if VA_LIST_IS_ARRAY
+#    define VA_LIST_COPY(dest,src) memcpy((dest), (src), sizeof(va_list))
+#  else
+#    define VA_LIST_COPY(dest,src) ((dest) = (src))
+#  endif
 #endif