Be inspired more by Hugo-- introduce HAS_MODFL_POW32_BUG.

[p5sagit/p5-mst-13.2.git] / Porting / Glossary

diff --git a/Porting/Glossary b/Porting/Glossary
index aef6a26..6995d08 100644 (file)
--- a/Porting/Glossary
+++ b/Porting/Glossary
@@ -1005,6 +1005,13 @@ d_modfl (d_modfl.U):
        This variable conditionally defines the HAS_MODFL symbol, which
        indicates to the C program that the modfl() routine is available.
 
+d_modfl_pow32_bug (d_modfl.U):
+       This variable conditionally defines the HAS_MODFL_POW32_BUG symbol,
+       which indicates that modfl() is broken for long doubles >= pow(2, 32).
+       For example from 4294967303.150000 one would get 4294967302.000000
+       and 1.150000.  The bug has been seen in certain versions of glibc,
+       release 2.2.2 is known to be okay.
+
 d_mprotect (d_mprotect.U):
        This variable conditionally defines HAS_MPROTECT if mprotect() is
        available to modify the access protection of a memory mapped file.