defines the corresponding bit(s), so that one can call
exception handling functions e.g. using the integer argument
.BR FE_OVERFLOW | FE_UNDERFLOW .
-Other exceptions may be supported. The macro
+Other exceptions may be supported.
+The macro
.B FE_ALL_EXCEPT
is the bitwise OR of all bits corresponding to supported exceptions.
.PP
.BR feholdexcept ()
function does the same, then clears all exception flags,
and sets a non-stop (continue on exceptions) mode,
-if available. It returns zero when successful.
+if available.
+It returns zero when successful.
.LP
The
.BR fesetenv ()
If possible, the GNU C Library defines a macro
.B FE_NOMASK_ENV
which represents an environment where every exception raised causes a
-trap to occur. You can test for this macro using
+trap to occur.
+You can test for this macro using
.BR #ifdef .
It is only defined if
.B _GNU_SOURCE