7186278: Build error after CR#6995781 / 7151532 with GCC 4.7.0

[David Holmes]

Thank you for the report. We recently encountered a similar GCC 4.7
issue (7172226). I think this may be addressed in the upcoming NoPermGen
changes but we can use the patch in other release trains if necessary.

David Holmes

On 24/07/2012 4:09 PM, Yasumasa Suenaga wrote:
> Hi,
> 
> When I build JDK8 with GCC 4.7.0 on Fedora17, it fails with message as following:
> 
> ----------
> /usr/src/OpenJDK/8/test/jdk8/hotspot/src/share/vm/utilities/hashtable.hpp: In instantiation of 'int Hashtable<T, F>::index_for(Symbol*) [with T = constantPoolOopDesc*; short unsigned int F = 256u]':
> /usr/src/OpenJDK/8/test/jdk8/hotspot/src/share/vm/utilities/hashtable.cpp:317:16:   required from here
> /usr/src/OpenJDK/8/test/jdk8/hotspot/src/share/vm/utilities/hashtable.hpp:263:44: error: 'hash_to_index' was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive]
> /usr/src/OpenJDK/8/test/jdk8/hotspot/src/share/vm/utilities/hashtable.hpp:263:44: note: declarations in dependent base 'BasicHashtable<256u>' are not found by unqualified lookup
> /usr/src/OpenJDK/8/test/jdk8/hotspot/src/share/vm/utilities/hashtable.hpp:263:44: note: use 'this->hash_to_index' instead
> ----------
> 
> This problem is caused by C++ template class.
> We have to explicit references of C++ class member to access them.
> 
>    Bug 43282 - GCC looks into dependent bases during unqualified lookup
>    http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43282
> 
> 
> I posted this problem on BugDatabase as a new bug.
> 
> I've made a patch which attached in this email, and it works fine in my environment.
> I would like to contribute this patch, and I hope to merge this patch into mainline.
> 
> Please cooperate.
> 
> 
> Best regards,
> Yasumasa
>