Add autoconf test to detect x87-style double rounding, as described in
tree23078d4419a31ee344552ae6c6dd81eb41df77ff
-rw-r--r-- 673 .bzrignore
-rw-r--r-- 866 .hgignore
drwxr-xr-x - Demo
drwxr-xr-x - Doc
drwxr-xr-x - Grammar
drwxr-xr-x - Include
-rw-r--r-- 13925 LICENSE
drwxr-xr-x - Lib
drwxr-xr-x - Mac
-rw-r--r-- 38892 Makefile.pre.in
drwxr-xr-x - Misc
drwxr-xr-x - Modules
drwxr-xr-x - Objects
drwxr-xr-x - PC
drwxr-xr-x - PCbuild
drwxr-xr-x - Parser
drwxr-xr-x - Python
-rw-r--r-- 56967 README
drwxr-xr-x - RISCOS
drwxr-xr-x - Tools
-rwxr-xr-x 678742 configure
-rw-r--r-- 107225 configure.in
-rwxr-xr-x 7122 install-sh
-rw-r--r-- 29334 pyconfig.h.in
-rw-r--r-- 82464 setup.py