Changeset 924

Timestamp:

Oct 2, 2007, 11:47:38 AM (16 years ago)

Author:

Markus Ringnér

Message:

See ticket:190

File:

• trunk/configure.ac (modified) (2 diffs)

trunk/configure.ac

@@ -84 +84 @@
 
 # check for quiet_NaN support in OS
+# At compile time, but this may not work if quiet_NaN exists and returns
+# an incorrect value
 AC_MSG_CHECKING([for std::numeric_limits<>::quiet_NaN()])
 AC_COMPILE_IFELSE(
@@ -90 +92 @@
      extern void f(double);],
     [f(std::numeric_limits<double>::quiet_NaN())])],
+  [quiet_nan=yes],
+  [quiet_nan=no])
+AC_MSG_RESULT($quiet_nan)
+if test "${quiet_nan}" = "no" ; then
+  AC_MSG_FAILURE([
+    Support for quiet NAN required.
+    Yat will not work on this system!])
+fi
+# At run-time, but this has the disadvantage that yat cannot be built  
+# for cross-compilation
+AC_MSG_CHECKING([if std::numeric_limits<>::has_quiet_NaN is true])
+AC_RUN_IFELSE(
+  [AC_LANG_PROGRAM(
+    [#include <limits>],
+    [return !std::numeric_limits<double>::has_quiet_NaN])],
   [quiet_nan=yes],
   [quiet_nan=no])