// Copyright 2019-2020 CERN and copyright holders of ALICE O2.

// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.

// All rights not expressly granted are reserved.

//

// This software is distributed under the terms of the GNU General Public

// License v3 (GPL Version 3), copied verbatim in the file "COPYING".

//

// In applying this license CERN does not waive the privileges and immunities

// granted to it by virtue of its status as an Intergovernmental Organization

// or submit itself to any jurisdiction.

// To enable check for problematic LIBXML version uncomment this

// #define _PROTECT_LIBXML_

#ifdef __linux

#ifdef _PROTECT_LIBXML_

#include <libxml/xmlversion.h>

#if LIBXML_VERSION > 20912

#define _DUMMY_FEE_TRAP_

#endif // LIBXML_VERSION > 20912

#endif // _PROTECT_LIBXML_

#else // __linux

#define _DUMMY_FEE_TRAP_

#endif // __linux

#ifdef _DUMMY_FEE_TRAP_

void trapfpe() {}

#else // _DUMMY_FEE_TRAP_

#define _GNU_SOURCE 1

#include <cfenv>

#include <cstdlib>

static void __attribute__((constructor)) trapfpe()

{

// allows to disable set of particular FE's by setting corresponding bit of the O2_DISABLE_FPE_TRAP,

// i.e. to enable only FE_DIVBYZERO use O2_DISABLE_FPE_TRAP=9

// const char* ev = std::getenv("O2_DISABLE_FPE_TRAP");

// int enabledFE = (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW) & ~(ev ? atoi(ev) : 0);

const char* ev = std::getenv("O2_ENABLE_FPE_TRAP");

int enabledFE = (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW) & (ev ? atoi(ev) : 0);

if (enabledFE) {

feenableexcept(enabledFE);

}

}

#endif // _DUMMY_FEE_TRAP_