Add a Configure test to see if NV 0.0 is stored as all bits zero, and

[perl5.git] / config_h.SH

diff --git a/config_h.SH b/config_h.SH
index 422bd6c..7ff827f 100644 (file)
--- a/config_h.SH
+++ b/config_h.SH
@@ -3235,6 +3235,10 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
  *     This symbol contains the number of bits a variable of type NVTYPE
  *     can preserve of a variable of type UVTYPE.
  */
+/* NV_ZERO_IS_ALLBITS_ZERO
+ *     This symbol, if defined, indicates that a variable of type NVTYPE
+ *     stores 0.0 in memory as all bits zero.
+ */
 #define        IVTYPE          $ivtype         /**/
 #define        UVTYPE          $uvtype         /**/
 #define        I8TYPE          $i8type         /**/
@@ -3263,6 +3267,7 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
 #define        NVSIZE          $nvsize         /**/
 #$d_nv_preserves_uv    NV_PRESERVES_UV
 #define        NV_PRESERVES_UV_BITS    $nv_preserves_uv_bits
+#$d_nv_zero_is_allbits_zero    NV_ZERO_IS_ALLBITS_ZERO
 #if UVSIZE == 8
 #   ifdef BYTEORDER
 #       if BYTEORDER == 0x1234