configure: remove some header checks

do them using C++17's __has_include instead

* configure.ac: Do not check for sys/times.h,
valgrind/memcheck.h, and spawn.h.
* bin/common_trans.cc, spot/misc/fixpool.hh, spot/misc/mspool.hh,
spot/misc/timer.hh: Adjust to use __has_include instead.

bin/common_trans.cc

@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2015-2021 Laboratoire de Recherche et Développement
+// Copyright (C) 2015-2022 Laboratoire de Recherche et Développement
 // de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -27,7 +27,8 @@
 #include <sys/wait.h>
 #include <fcntl.h>
 #include <iomanip>
-#ifdef HAVE_SPAWN_H
+#if __has_include(<spawn.h>)
+#define HAVE_SPAWN_H 1
 #include <spawn.h>
 #endif
 #include <regex>

configure.ac

@@ -147,7 +147,6 @@ CHECK_ATOMIC
 
 AX_CHECK_BUDDY
 
-AC_CHECK_HEADERS([sys/times.h valgrind/memcheck.h spawn.h])
 AC_CHECK_FUNCS([times kill alarm sigaction sched_getcpu])
 
 oLIBS=$LIBS

spot/misc/fixpool.hh

@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2011, 2015-2018, 2020 Laboratoire de Recherche et
+// Copyright (C) 2011, 2015-2018, 2020, 2022 Laboratoire de Recherche et
 // Développement de l'Epita (LRDE)
 //
 // This file is part of Spot, a model checking library.
@@ -22,7 +22,9 @@
 #include <spot/misc/common.hh>
 #include <spot/misc/clz.hh>
 
-#if SPOT_DEBUG && defined(HAVE_VALGRIND_MEMCHECK_H)
+#if SPOT_DEBUG && __has_include(<valgrind/memcheck.h>)
+#undef USES_MEMCHECK_H
+#define USES_MEMCHECK_H 1
 #include <valgrind/memcheck.h>
 #endif
 
@@ -90,7 +92,7 @@ namespace spot
       // If we have free blocks available, return the first one.
       if (f)
         {
-#if SPOT_DEBUG && defined(HAVE_VALGRIND_MEMCHECK_H)
+#ifdef USES_MEMCHECK_H
           if (Kind == pool_type::Safe)
             {
               VALGRIND_MALLOCLIKE_BLOCK(f, size_, 0, false);
@@ -112,7 +114,7 @@ namespace spot
 
       void* res = free_start_;
       free_start_ += size_;
-#if SPOT_DEBUG && defined(HAVE_VALGRIND_MEMCHECK_H)
+#ifdef USES_MEMCHECK_H
       if (Kind == pool_type::Safe)
         {
           VALGRIND_MALLOCLIKE_BLOCK(res, size_, 0, false);
@@ -134,7 +136,7 @@ namespace spot
       block_* b = reinterpret_cast<block_*>(ptr);
       b->next = freelist_;
       freelist_ = b;
-#if SPOT_DEBUG && defined(HAVE_VALGRIND_MEMCHECK_H)
+#ifdef USES_MEMCHECK_H
       if (Kind == pool_type::Safe)
         {
           VALGRIND_FREELIKE_BLOCK(ptr, 0);

spot/misc/mspool.hh

@@ -1,6 +1,6 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2011, 2013, 2015, 2016, 2018 Laboratoire de Recherche et
+// Copyright (C) 2011, 2013, 2015-2016, 2018, 2022 Laboratoire de
-// Developpement de l'Epita (LRDE)
+// Recherche et Developpement de l'Epita (LRDE)
 //
 // This file is part of Spot, a model checking library.
 //
@@ -22,7 +22,9 @@
 #include <spot/misc/common.hh>
 #include <unordered_map>
 
-#if SPOT_DEBUG && defined(HAVE_VALGRIND_MEMCHECK_H)
+#if SPOT_DEBUG && __has_include(<valgrind/memcheck.h>)
+#undef USES_MEMCHECK_H
+#define USES_MEMCHECK_H 1
 #include <valgrind/memcheck.h>
 #endif
 
@@ -70,7 +72,7 @@ namespace spot
       if (f)
         {
           block_* first = f;
-#if SPOT_DEBUG && defined(HAVE_VALGRIND_MEMCHECK_H)
+#ifdef USES_MEMCHECK_H
           VALGRIND_MALLOCLIKE_BLOCK(f, size, 0, false);
           // field f->next is initialized: prevents valgrind from complaining
           // about jumps depending on uninitialized memory
@@ -99,7 +101,7 @@ namespace spot
 
       void* res = free_start_;
       free_start_ += size;
-#if SPOT_DEBUG && defined(HAVE_VALGRIND_MEMCHECK_H)
+#ifdef USES_MEMCHECK_H
       VALGRIND_MALLOCLIKE_BLOCK(res, size, 0, false);
 #endif
       return res;
@@ -123,7 +125,7 @@ namespace spot
       block_*& f = freelist_[size];
       b->next = f;
       f = b;
-#if SPOT_DEBUG && defined(HAVE_VALGRIND_MEMCHECK_H)
+#ifdef USES_MEMCHECK_H
       VALGRIND_FREELIKE_BLOCK(ptr, 0);
 #endif
     }

spot/misc/timer.hh

@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2009, 2011, 2012, 2013, 2014, 2015, 2016 Laboratoire de
+// Copyright (C) 2009, 2011, 2012, 2013, 2014, 2015, 2016, 2022 Laboratoire de
 // Recherche et Développement de l'Epita (LRDE).
 // Copyright (C) 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
 // département Systèmes Répartis Coopératifs (SRC), Université Pierre
@@ -29,7 +29,7 @@
 #include <string>
 #include <map>
 #include <chrono>
-#if SPOT_HAVE_SYS_TIMES_H
+#if __has_include(<sys/times.h>)
 # include <sys/times.h>
 #endif
 #include <ctime>