[Bug web/34443] New: The GCC manual about section variable attribute is incorrect

[fbuihuu at gmail dot com]

Since at least 3.4, the GCC manual says:

     Use the `section' attribute with an _initialized_ definition of a
     _global_ variable, as shown in the example.  GCC issues a warning
     and otherwise ignores the `section' attribute in uninitialized
     variable declarations.

but this doesn't seem correct.

For example compiling the following tiny program:

        int foo __attribute__ ((__section__ (".init.data")));

        int main(int argc, char **argv)
        {
                foo = 4;
                return 0;
        }

produces no warning and the section attribute is not ignored at all:

        $ readelf -S a.out | grep -A1 init.data
        [24] .init.data        PROGBITS         000000000060080c  0000080c
        0000000000000004  0000000000000000  WA       0     0     4

This is with 4.1.2 from fedora, but I guess other GCC give the same result.

I would be nice to have all manuals reflecting this too.

Thanks !


-- 
           Summary: The GCC manual about section variable attribute is
                    incorrect
           Product: gcc
           Version: 4.2.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: web
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: fbuihuu at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34443