doc: fix typo in variable name

Message-Id: <YJ4Tm3WEkv86L/YV@FSAPPLE2215.fi.f-secure.com>
(tiny change)

diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 7b42dd6a879fb7ba748a327b5aefb8d9a7ba7365..33cebc376f51e1101de9b79a2534afdd16ca9cd4 100644 (file)
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -7887,7 +7887,7 @@ ISO Standard C++ features with extensions, preferring the newest edition
 of the C++ standard that is supported.  Currently the newest edition
 Autoconf knows how to detect support for is ISO C++ 2011.  After calling
 this macro, you can check whether the C++ compiler has been set to
-accept standard C++ by inspecting the shell variable @code{ac_prog_cc_stdc}.
+accept standard C++ by inspecting the shell variable @code{ac_prog_cxx_stdcxx}.
 Its value will be @samp{cxx11} or @samp{cxx98}, respectively,
 if the C++ compiler has been set to use the 2011 or 1990 edition of the
 C++ standard, and @samp{no} if the compiler does not support compiling