https://bugs.llvm.org/show_bug.cgi?id=48869
Bug ID: 48869
Summary: gcc 5.3: fails with error: implicit instantiation of
undefined template
'std::hash'
Product: lldb
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: release blocker
Priority: P
Component: All Bugs
Assignee: lldb-dev@lists.llvm.org
Reporter: sylves...@debian.org
CC: apra...@apple.com, jdevliegh...@apple.com,
llvm-b...@lists.llvm.org, teempe...@gmail.com
In theory, llvm should support gcc from version 5.1:
https://llvm.org/docs/GettingStarted.html#software
but it fails to build using 5.3.1, the version of gcc on Ubuntu Xenial (a LTS).
I think the regressor is https://reviews.llvm.org/D92759
apt.llvm.org for xenial has been broke since Dec 10
Full error:
cd
"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/build-llvm/tools/clang/stage2-bins/tools/lldb/source/Plugins/TypeSystem/Clang"
&&
"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/build-llvm/./bin/clang++"
-DHAVE_ROUND -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS
-D__STDC_LIMIT_MACROS
-I"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/build-llvm/tools/clang/stage2-bins/tools/lldb/source/Plugins/TypeSystem/Clang"
-I"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/lldb/source/Plugins/TypeSystem/Clang"
-I"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/build-llvm/tools/clang/stage2-bins/tools/lldb/source"
-I"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/lldb/include"
-I"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/build-llvm/tools/clang/stage2-bins/tools/lldb/include"
-I"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/build-llvm/tools/clang/stage2-bins/include"
-I"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/llvm/include"
-I/usr/include/python3.5m
-I"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/clang/include"
-I"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/build-llvm/tools/clang/stage2-bins/tools/lldb/../clang/include"
-I"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/lldb/source/."
-fuse-ld=gold -fPIC -Wno-unused-command-line-argument
-Wno-unknown-warning-option -fPIC -fvisibility-inlines-hidden -Werror=date-time
-Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter
-Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic
-Wno-long-long -Wimplicit-fallthrough -Wcovered-switch-default
-Wno-class-memaccess -Wno-noexcept-type -Wnon-virtual-dtor
-Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion
-ffunction-sections -fdata-sections -Wno-deprecated-declarations
-Wno-unknown-pragmas -Wno-strict-aliasing -Wno-deprecated-register
-Wno-vla-extension -O2 -DNDEBUG -g1 -fno-exceptions -std=c++14 -o
CMakeFiles/lldbPluginTypeSystemClang.dir/TypeSystemClang.cpp.o -c
"/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
In file included from
/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp:9:
In file included from
/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.h:30:
In file included from
/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/lldb/source/./Plugins/ExpressionParser/Clang/ClangPersistentVariables.h:14:
In file included from
/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/lldb/source/./Plugins/ExpressionParser/Clang/ClangExpressionVariable.h:23:
In file included from
/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/lldb/include/lldb/Expression/ExpressionVariable.h:17:
In file included from
/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/lldb/include/lldb/Core/ValueObject.h:16:
In file included from
/build/llvm-toolchain-snapshot-12~++20210125020813+f4537935dcdb/lldb/include/lldb/Target/Process.h:21:
In file included from
/usr/lib/gcc/x86_64-linux-gnu/5.3.1/../../../../include/c++/5.3.1/unordered_set:47:
In file included from
/usr/lib/gcc/x86_64-linux-gnu/5.3.1/../../../../include/c++/5.3.1/bits/hashtable.h:35:
/usr/lib/gcc/x86_64-linux-gnu/5.3.1/../../../../include/c++/5.3.1/bits/hashtable_policy.h:85:11:
error: implicit instantiation of undefined template
'std::hash'
noexcept(declval()(declval()))>
^
/usr/lib/gcc/x86_64-linux-gnu/5.3.1/../../../../include/c++/5.3.1/type_traits:138:14:
note: in instantiation of template class
'std::__detail::__is_noexcept_hash>' requested
here
: public conditional<_B1::value, _B2, _B1>::type
^
/usr/lib/gcc/x86_64-linux-gnu/5.3.1/../../../../include/c++/5.3.1/type_traits:148:3
