[llvm-bugs] [Bug 38654] New: MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMP fails to build with newer libstdc++

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38654

            Bug ID: 38654
           Summary: MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMP fails
                    to build with newer libstdc++
           Product: Test Suite
           Version: 7.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Programs Tests
          Assignee: unassignedbugs at nondot.org
          Reporter: tstellar at redhat.com
                CC: llvm-bugs at lists.llvm.org
            Blocks: 38406

Created attachment 20750
  --> https://bugs.llvm.org/attachment.cgi?id=20750&action=edit
Build fix

I get the following error with gcc/libstdc++ 8.2 when trying to compile
MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMP.  The attached patch fixes it
for me.

gcc  -DNDEBUG
-I/usr/share/llvm-test-suite/MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMR
-IMultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMR -O2 -DNDEBUG -o
MallocPlus.cpp.o -c
/usr/share/llvm-test-suite/MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMR/MallocPlus.cpp
In file included from /usr/include/c++/8/map:60,
                 from
/usr/share/llvm-test-suite/MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMR/MallocPlus.h:56,
                 from
/usr/share/llvm-test-suite/MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMR/MallocPlus.cpp:61:
/usr/include/c++/8/bits/stl_tree.h: In instantiation of 'class
std::_Rb_tree<std::__cxx11::basic_string<char>, std::pair<const
std::__cxx11::basic_string<char>, malloc_plus_memory_entry*>,
std::_Select1st<std::pair<const std::__cxx11::basic_string<char>,
malloc_plus_memory_entry*> >, cmp_str, std::allocator<std::pair<const
std::__cxx11::basic_string<char>, malloc_plus_memory_entry*> > >':
/usr/include/c++/8/bits/stl_map.h:151:17:   required from 'class
std::map<std::__cxx11::basic_string<char>, malloc_plus_memory_entry*, cmp_str>'
/usr/share/llvm-test-suite/MultiSource/Benchmarks/DOE-ProxyApps-C++/CLAMR/MallocPlus.cpp:97:48:
  required from here
/usr/include/c++/8/bits/stl_tree.h:452:21: error: static assertion failed:
comparison object must be invocable with two arguments of key type
       static_assert(__is_invocable<_Compare&, const _Key&, const _Key&>{},


Referenced Bugs:

https://bugs.llvm.org/show_bug.cgi?id=38406
[Bug 38406] [meta] 7.0.0 Release Blockers
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