switch to built-in atanh() on vs2013 and up

diff --git a/win32/build/confutils.js b/win32/build/confutils.js
index d6a6e20ecdda158f5ef6a5e9febe687739d7247d..3e1a99fe4e2fc055d0ad1f3db48881d7187d3224 100644 (file)
--- a/win32/build/confutils.js
+++ b/win32/build/confutils.js
@@ -1892,6 +1892,7 @@ function generate_config_h()
                outfile.WriteLine("");\r
                outfile.WriteLine("#define HAVE_ACOSH 1");\r
                outfile.WriteLine("#define HAVE_ASINH 1");\r
+               outfile.WriteLine("#define HAVE_ATANH 1");\r
        }\r
 \r
        \r