------- Comment #4 from paolo dot carlini at oracle dot com 2010-06-21 14:44
-------
I don't think signbit is special: including *any* <c*> header first undefs the
names, thus if they are defined as macros in C, you don't see them anymore in
the global namespace, only in std::. If, on the other hand, your specific point
is one about the C99 classification macros, yes those are enabled by default,
can be disabled at library configure time with --disable-c99. In fact the issue
whether C99 facilities should be enabled by default in c++98 mode is a very old
one, you can find traces of it in bugzilla for sure, and now is definitely *way
too old* to change our decision, considering that all of that is standard in
c++0x, which is behind the corner.
--
paolo dot carlini at oracle dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Including <math,h> and |Including <math.h> and
|<cmath> hides ::signbit |<cmath> hides ::signbit
|function |function
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44611
