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-rw-r--r--libiberty/vprintf.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/libiberty/vprintf.c b/libiberty/vprintf.c
index 65b425a4d6..c57c3e4f31 100644
--- a/libiberty/vprintf.c
+++ b/libiberty/vprintf.c
@@ -1,3 +1,20 @@
+/*
+
+@deftypefn Supplemental int vprintf (const char *@var{format}, va_list @var{ap})
+@deftypefnx Supplemental int vfprintf (FILE *@var{stream}, const char *@var{format}, va_list @var{ap})
+@deftypefnx Supplemental int vsprintf (char *@var{str}, const char *@var{format}, va_list @var{ap})
+
+These functions are the same as @code{printf}, @code{fprintf}, and
+@code{sprintf}, respectively, except that they are called with a
+@code{va_list} instead of a variable number of arguments. Note that
+they do not call @code{va_end}; this is the application's
+responsibility. In @libib{} they are implemented in terms of the
+nonstandard but common function @code{_doprnt}.
+
+@end deftypefn
+
+*/
+
#ifdef __STDC__
#include <stdarg.h>
#else
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