bzr merge from guilhem's maria tree to our local 5.1

configure.in:
  Manually merged
mysql-test/lib/My/ConfigFactory.pm:
  Manually merged
mysql-test/mysql-test-run.pl:
  Manually merged
mysql-test/t/information_schema.test:
  Manually merged
sql/handler.cc:
  Manually merged
support-files/mysql.spec.sh:
  Manually merged

1 files changed, 36 insertions, 4 deletions

diff --git a/include/my_global.h b/include/my_global.h
index 37bcab244ff..f14204cf215 100644
--- a/include/my_global.h
+++ b/include/my_global.h
@@ -430,6 +430,9 @@ C_MODE_END
 #ifdef HAVE_FLOAT_H
 #include <float.h>
 #endif
+#ifdef HAVE_FENV_H
+#include <fenv.h> /* For fesetround() */
+#endif
 
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
@@ -592,8 +595,39 @@ typedef unsigned short ushort;
 #define set_bits(type, bit_count) (sizeof(type)*8 <= (bit_count) ? ~(type) 0 : ((((type) 1) << (bit_count)) - (type) 1))
 #define array_elements(A) ((uint) (sizeof(A)/sizeof(A[0])))
 #ifndef HAVE_RINT
-#define rint(A) floor((A)+(((A) < 0)? -0.5 : 0.5))
-#endif
+/**
+   All integers up to this number can be represented exactly as double precision
+   values (DBL_MANT_DIG == 53 for IEEE 754 hardware).
+*/
+#define MAX_EXACT_INTEGER ((1LL << DBL_MANT_DIG) - 1)
+
+/**
+   rint(3) implementation for platforms that do not have it.
+   Always rounds to the nearest integer with ties being rounded to the nearest
+   even integer to mimic glibc's rint() behavior in the "round-to-nearest"
+   FPU mode. Hardware-specific optimizations are possible (frndint on x86).
+   Unlike this implementation, hardware will also honor the FPU rounding mode.
+*/
+
+static inline double rint(double x)
+{
+  double f, i;
+  f = modf(x, &i);
+  /*
+    All doubles with absolute values > MAX_EXACT_INTEGER are even anyway,
+    no need to check it.
+  */
+  if (x > 0.0)
+    i += (double) ((f > 0.5) || (f == 0.5 &&
+                                 i <= (double) MAX_EXACT_INTEGER &&
+                                 (longlong) i % 2));
+  else
+    i -= (double) ((f < -0.5) || (f == -0.5 &&
+                                  i >= (double) -MAX_EXACT_INTEGER &&
+                                  (longlong) i % 2));
+  return i;
+}
+#endif /* HAVE_RINT */
 
 /* Define some general constants */
 #ifndef TRUE
@@ -635,7 +669,6 @@ C_MODE_END
 */
 #define _VARARGS(X) X
 #define _STATIC_VARARGS(X) X
-#define _PC(X)	X
 
 /* The DBUG_ON flag always takes precedence over default DBUG_OFF */
 #if defined(DBUG_ON) && defined(DBUG_OFF)
@@ -739,7 +772,6 @@ typedef SOCKET_SIZE_TYPE size_socket;
 #define UNSINT32		/* unsigned int32 */
 
 	/* General constants */
-#define SC_MAXWIDTH	256	/* Max width of screen (for error messages) */
 #define FN_LEN		256	/* Max file name len */
 #define FN_HEADLEN	253	/* Max length of filepart of file name */
 #define FN_EXTLEN	20	/* Max length of extension (part of FN_LEN) */