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Fix buildworld with gcc 13 after llvm-19 import

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It turns out the new libc++ 19 headers result in a -Werror warning from
gcc 13:

  In file included from /usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/__memory/shared_ptr.h:31:
  /usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/__memory/uninitialized_algorithms.h: In instantiation of 'constexpr void std::__1::__uninitialized_allocator_relocate(_Alloc&, _Tp*, _Tp*, _Tp*) [with _Alloc = allocator<basic_string<char> >; _Tp = basic_string<char>]':
  /usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/vector:1052:42:   required from 'void std::__1::vector<_Tp, _Alloc>::__swap_out_circular_buffer(std::__1::__split_buffer<_Tp, _Allocator&>&) [with _Tp = std::__1::basic_string<char>; _Allocator = std::__1::allocator<std::__1::basic_string<char> >]'
  /usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/vector:1469:31:   required from 'void std::__1::vector<_Tp, _Alloc>::reserve(size_type) [with _Tp = std::__1::basic_string<char>; _Allocator = std::__1::allocator<std::__1::basic_string<char> >; size_type = long unsigned int]'
  /usr/src/freebsd/src/contrib/googletest/googletest/src/gtest.cc:795:27:   required from here
  /usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/__memory/uninitialized_algorithms.h:645:21: error: 'void* __builtin_memcpy(void*, const void*, long unsigned int)' writing to an object of type 'std::__1::__remove_const_t<std::__1::basic_string<char> >' {aka 'class std::__1::basic_string<char>'} with no trivial copy-assignment; use copy-assignment or copy-initialization instead o[-Werror=class-memaccess]
    645 |     __builtin_memcpy(const_cast<__remove_const_t<_Tp>*>(__result), __first, sizeof(_Tp) * (__last - __first));
        |     ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  In file included from /usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/__system_error/error_category.h:15,
                   from /usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/__system_error/error_code.h:18,
                   from /usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/__ostream/basic_ostream.h:16:
  /usr/obj/usr/src/freebsd/src/amd64.amd64/tmp/usr/include/c++/v1/string:752:7: note: 'std::__1::__remove_const_t<std::__1::basic_string<char> >' {aka 'class std::__1::basic_string<char>'} declared here
    752 | class basic_string {
        |       ^~~~~~~~~~~~

Since this is all benign, turn off errors for -Wclass-memaccess.

PR:		280562
MFC after:	3 days
This commit is contained in:
Dimitry Andric
2024-10-24 23:42:36 +02:00
parent ce5b5361d4
commit a3a88aa132
1 changed files with 1 additions and 0 deletions
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share/mk/bsd.sys.mk
+1
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@@ -221,6 +221,7 @@ CWARNFLAGS+= -Wno-error=aggressive-loop-optimizations \
-Wno-error=restrict \
-Wno-error=sizeof-pointer-memaccess \
-Wno-error=stringop-truncation
CXXWARNFLAGS+= -Wno-error=class-memaccess
.endif
# GCC 9.2.0