In math code we often have to make sure the compiler does not fold operations
at compile time. In glibc we use variable declared as
static const volatile double foo = 42.0;
The problem is that gcc moves such variables into .data. But we could achieve
that easily by leaving out the 'const'. What is needed is a method to achieve
volatile behavior while having the variable in .rodata (and .rodata.cst8 etc).
I therefore would like to ask for a change in the compiler which preserves the
'const' in the presence of 'volatile' and place the variable in read-only
memory.
--
Summary: change semantics of const volatile variables
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: drepper at redhat dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25521
