[MESOS-9002] GCC 8.1 build failure in os::Fork::Tree.

• Type: Task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.6.1, 1.7.0
• Assignee: James Peach
• Reporter: James Peach
• Created: 15/Jun/18 17:51
• Updated: 15/Jun/18 23:18
• Resolved: 15/Jun/18 23:18

Description

Building Mesos with gcc 8.1 (Fedora 28)

../../3rdparty/stout/include/stout/os/posix/fork.hpp: In member function ‘pid_t os::Fork::instantiate(const os::Fork::Tree&) const’:
../../3rdparty/stout/include/stout/os/posix/fork.hpp:354:61: error: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘using element_type = std::remove_extent<os::Fork::Tree::Memory>::type’ {aka ‘struct os::Fork::Tree::Memory’} with no trivial copy-assignment [-Werror=class-memaccess]
     memcpy(tree.memory.get(), &process, sizeof(Tree::Memory));
                                                             ^
../../3rdparty/stout/include/stout/os/posix/fork.hpp:235:12: note: ‘using element_type = std::remove_extent<os::Fork::Tree::Memory>::type’ {aka ‘struct os::Fork::Tree::Memory’} declared here
     struct Memory {
            ^~~~~~