acinclude.m4: remove definition of va_copy, just detect its presence.

printf.c vasprintf.c: #define a replacement of va_copy if needed (in the same way as gmp).


git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@6143 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 13 insertions, 0 deletions

diff --git a/printf.c b/printf.c
index 1557cc652..38b754229 100644
--- a/printf.c
+++ b/printf.c
@@ -28,6 +28,19 @@ http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
 #ifdef HAVE_STDARG
 
 #include <stdarg.h>
+
+#ifndef HAVE_VA_COPY
+# ifdef HAVE___VA_COPY
+#  define va_copy(dst,src) __va_copy(dst, src)
+# else
+/* autoconf manual advocates this fallback.
+   This is also the solution chosen by gmp */
+#  define va_copy(dst,src) \
+  do { memcpy(&(dst), &(src), sizeof(va_list)); } while (0)
+# endif /* HAVE___VA_COPY */
+#endif /* HAVE_VA_COPY */
+
+
 #include <errno.h>
 #include "mpfr-impl.h"