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generated...
2007-08-05

(C) 2007 guidod
Download the M4 Source.

ac_cxx_have_numeric_limits

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Synopsis
AC_CXX_HAVE_NUMERIC_LIMITS
, 
,
Version

2004-02-04

Author

Todd Veldhuizen Luc Maisonobe <luc@spaceroots.org>

License

AllPermissive
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. Users of this software should generally follow the principles of the MIT License includings its disclaimer.

Category

cryp.to ac-archive's C++ Support (released)

Documentation

If the compiler has numeric_limits<T>, define HAVE_NUMERIC_LIMITS.

M4 Source Code
AC_DEFUN([AC_CXX_HAVE_NUMERIC_LIMITS],
[AC_CACHE_CHECK(whether the compiler has numeric_limits&lt;T&gt;,
ac_cv_cxx_have_numeric_limits,
[AC_REQUIRE([AC_CXX_NAMESPACES])
 AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
 AC_TRY_COMPILE([#include &lt;limits&gt;
#ifdef HAVE_NAMESPACES
using namespace std;
#endif],[double e = numeric_limits&lt;double&gt;::epsilon(); return 0;],
 ac_cv_cxx_have_numeric_limits=yes, ac_cv_cxx_have_numeric_limits=no)
 AC_LANG_RESTORE
])
if test "$ac_cv_cxx_have_numeric_limits" = yes; then
  AC_DEFINE(HAVE_NUMERIC_LIMITS,,[define if the compiler has numeric_limits&lt;T&gt;])
fi
])