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[gdb/build] Fix build with -std=c++11

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When building with -std=c++11, we run into two Werror=missing-declarations:
...
new-op.cc: In function 'void operator delete(void*, std::size_t)':
new-op.cc:114:1: error: no previous declaration for \
  'void operator delete(void*, std::size_t)' [-Werror=missing-declarations]
 operator delete (void *p, std::size_t) noexcept
 ^~~~~~~~
new-op.cc: In function 'void operator delete [](void*, std::size_t)':
new-op.cc:132:1: error: no previous declaration for \
  'void operator delete [](void*, std::size_t)' [-Werror=missing-declarations]
 operator delete[] (void *p, std::size_t) noexcept
 ^~~~~~~~
...

These are due to recent commit 5fff6115fea "Fix
LD_PRELOAD=/usr/lib64/libasan.so.6 gdb".

The declarations are provided by <new> (which is included) for c++14 onwards,
but they are missing for c++11.

Fix this by adding the missing declarations.

Tested on x86_64-linux, with gcc 7.5.0, both without (implying -std=gnu++14) and
with -std=c++11.
This commit is contained in:
Tom de Vries
2021-11-11 11:22:39 +01:00
parent 585d6e39eb
commit b038b53f1f
1 changed files with 5 additions and 0 deletions
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5
gdbsupport/new-op.cc
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@ -27,6 +27,11 @@
#include "host-defs.h"
#include <new>
/* These are declared in <new> starting C++14. Add these here to enable
compilation using C++11. */
extern void operator delete (void *p, std::size_t) noexcept;
extern void operator delete[] (void *p, std::size_t) noexcept;
/* Override operator new / operator new[], in order to internal_error
on allocation failure and thus query the user for abort/core
dump/continue, just like xmalloc does. We don't do this from a