[Bug c++/41091] Using section attribute in c and c++ function causes section type conflict

["roland at redhat dot com" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #4 from roland at redhat dot com  2010-08-11 23:52 -------
The compiler is being internally inconsistent here.  It somtimes decides that
__attribute__((section ("name"))) means a "name" section in a COMDAT group, and
sometimes decides that it means just a plain "name" section.  If it's going to
have that behavior implicitly, then it should not call this a conflict. 
Instead, it should implicitly recognize that the particular COMDAT version of
"name" is a different animal than the non-COMDAT "name".

In fact, it has an arguably more severe version of this bug too:

        class C
        {
        public:
          void m()
          {
            static int TWO __attribute__((section(".consts"))) = 2;
          }
        };

        class D
        {
        public:
          void m()
          {
            static int THREE __attribute__((section(".consts"))) = 2;
          }
        };

        int
        main (int argc, char **argv)
        {
          C inst = C();
          inst.m();
          D inst2 = D();
          inst2.m();
          return 0;
        }

For that, it happily puts TWO and THREE initializers both in the COMDAT group
for C::m()::TWO, which is quite clearly wrong.  The left hand uses multiple
different sections of the same name, but the right hand thinks that any section
matching the simple name it's looking for is the same thing regardless of
whether or not its a distinct COMDAT variant.


-- 

roland at redhat dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |roland at redhat dot com,
                   |                            |jakub at redhat dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41091