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| author | Reuben Thomas <rrt@sc3d.org> | 2009-08-06 22:39:54 +0100 |
|---|---|---|
| committer | Reuben Thomas <rrt@sc3d.org> | 2009-08-06 22:39:54 +0100 |
| commit | 3ea011f8cd6c4c47bdd8e9779169efe2ad05caa6 (patch) | |
| tree | b985d888c9fc54bb8bbf7a7b7b6c3178fc58bb11 /m4/ax_cxx_have_numeric_limits.m4 | |
| parent | 2ff01bdb018a1a1bc9e5800314d70e06972192cc (diff) | |
| download | autoconf-archive-3ea011f8cd6c4c47bdd8e9779169efe2ad05caa6.tar.gz | |
Rename AC_ prefixes to AX_ (only in names of aa macros!).
Diffstat (limited to 'm4/ax_cxx_have_numeric_limits.m4')
| -rw-r--r-- | m4/ax_cxx_have_numeric_limits.m4 | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/m4/ax_cxx_have_numeric_limits.m4 b/m4/ax_cxx_have_numeric_limits.m4 new file mode 100644 index 0000000..da7884e --- /dev/null +++ b/m4/ax_cxx_have_numeric_limits.m4 @@ -0,0 +1,38 @@ +# =========================================================================== +# http://www.nongnu.org/autoconf-archive/ax_cxx_have_numeric_limits.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_CXX_HAVE_NUMERIC_LIMITS +# +# DESCRIPTION +# +# If the compiler has numeric_limits<T>, define HAVE_NUMERIC_LIMITS. +# +# LICENSE +# +# Copyright (c) 2008 Todd Veldhuizen +# Copyright (c) 2008 Luc Maisonobe <luc@spaceroots.org> +# +# 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. + +AC_DEFUN([AX_CXX_HAVE_NUMERIC_LIMITS], +[AC_CACHE_CHECK(whether the compiler has numeric_limits<T>, +ac_cv_cxx_have_numeric_limits, +[AC_REQUIRE([AC_CXX_NAMESPACES]) + AC_LANG_SAVE + AC_LANG_CPLUSPLUS + AC_TRY_COMPILE([#include <limits> +#ifdef HAVE_NAMESPACES +using namespace std; +#endif],[double e = numeric_limits<double>::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<T>]) +fi +]) |