Support compilation on gcc-7.4.0 (#19470)

Summary:
There are two corrections in this pull request.
The first is specific to gcc-7.4.0.
compiled with -std=c++14 gcc-7.4.0 has __cplusplus = 201402L
This does not meet the check set in Deprecated.h, which asks for >201402L.
The compiler goes down to the __GNUC__ check, which passes and sets C10_DEPRECATED_MESSAGE to a value that c++14 does not appear to support or even recognize, leading to a compile time error.
My recommended solution, which worked for my case, was to change the = into a >=

The second correction comes in response to this error:
caffe2/operators/crash_op.cc: In member function ‘virtual bool caffe2::CrashOp::RunOnDevice()’:
caffe2/operators/crash_op.cc:14:11: error: ‘SIGABRT’ was not declared in this scope

I am merely committing to the repository the solution suggested here (which worked for me)
https://discuss.pytorch.org/t/building-pytorch-from-source-in-conda-fails-in-pytorch-caffe2-operators-crash-op-cc/42859
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19470

Differential Revision: D15019529

Pulled By: ailzhang

fbshipit-source-id: 9ce9d713c860ee5fd4266e5c2a7f336a97d7a90d

1 files changed, 1 insertions, 0 deletions

diff --git a/caffe2/operators/crash_op.cc b/caffe2/operators/crash_op.cc
index a7bb9b1f84..70ef069cfd 100644
--- a/caffe2/operators/crash_op.cc
+++ b/caffe2/operators/crash_op.cc
@@ -2,6 +2,7 @@
 
 #include "caffe2/core/context.h"
 #include "caffe2/core/operator.h"
+#include <csignal>
 
 namespace caffe2 {