Merge PIVX-Project#2918: [Build] Update m4 macros from upstream

90b1892 build: AX_BOOST_UNIT_TEST_FRAMEWORK() serial 22 (Fuzzbawls)
92d478c build: AX_BOOST_THREAD() serial 33 (Fuzzbawls)
103b802 build: AX_BOOST_SYSTEM() serial 20 (Fuzzbawls)
1712d9a build: AX_BOOST_FILESYSTEM() serial 28 (Fuzzbawls)
583adf6 build: AX_BOOST_CHRONO() serial 5 (Fuzzbawls)
7d93e29 build: AX_BOOST_BASE() serial 54 (Fuzzbawls)
076fbf4 build: AX_PTHREAD() serial 31 (Fuzzbawls)
8813235 build: AX_GCC_FUNC_ATTRIBUTE() serial 13 (Fuzzbawls)
3596f0f build: AX_CXX_COMPILE_STDCXX() serial 18 (Fuzzbawls)
52a11ff build: AX_CHECK_PREPROC_FLAG() serial 6 (Fuzzbawls)
3200d3f build: AX_CHECK_LINK_FLAG() serial 6 (Fuzzbawls)
fd78360 build: AX_CHECK_COMPILE_FLAG() serial 6 (Fuzzbawls)

Pull request description:

  This is the first part in what will be a series of updates to our autotools build system. these commits are simply updating macro scripts from their upstream published versions. the only manual change that i've made is to ensure there is a new line at the bottom of each file.

ACKs for top commit: 90b1892
  panleone:
    utACK 90b1892,
  Liquid369:
    tACK 90b1892

Tree-SHA512: 273dec63811972835802ee890206e159494ec8934dac4e570bb74013473b4716022dcc933e593ab4634334a2acabf81e4e94df99d4d96b3aeaa6f328468bd7e1

build-aux/m4/ax_boost_chrono.m4

@@ -29,7 +29,7 @@
 #   and this notice are preserved. This file is offered as-is, without any
 #   warranty.
 
-#serial 4
+#serial 5
 
 AC_DEFUN([AX_BOOST_CHRONO],
 [
@@ -105,7 +105,7 @@ AC_DEFUN([AX_BOOST_CHRONO],
 
             fi
             if test "x$ax_lib" = "x"; then
-                AC_MSG_ERROR(Could not find a version of the library!)
+                AC_MSG_ERROR(Could not find a version of the Boost::Chrono library!)
             fi
 			if test "x$link_chrono" = "xno"; then
 				AC_MSG_ERROR(Could not link against $ax_lib !)

build-aux/m4/ax_boost_filesystem.m4

@@ -1,5 +1,5 @@
 # ===========================================================================
-#    http://www.gnu.org/software/autoconf-archive/ax_boost_filesystem.html
+#   https://www.gnu.org/software/autoconf-archive/ax_boost_filesystem.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -31,7 +31,7 @@
 #   and this notice are preserved. This file is offered as-is, without any
 #   warranty.
 
-#serial 26
+#serial 28
 
 AC_DEFUN([AX_BOOST_FILESYSTEM],
 [
@@ -80,7 +80,6 @@ AC_DEFUN([AX_BOOST_FILESYSTEM],
 		if test "x$ax_cv_boost_filesystem" = "xyes"; then
 			AC_DEFINE(HAVE_BOOST_FILESYSTEM,,[define if the Boost::Filesystem library is available])
             BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
-            ax_lib=
             if test "x$ax_boost_user_filesystem_lib" = "x"; then
                 for libextension in `ls -r $BOOSTLIBDIR/libboost_filesystem* 2>/dev/null | sed 's,.*/lib,,' | sed 's,\..*,,'` ; do
                      ax_lib=${libextension}
@@ -105,7 +104,7 @@ AC_DEFUN([AX_BOOST_FILESYSTEM],
 
             fi
             if test "x$ax_lib" = "x"; then
-                AC_MSG_ERROR(Could not find a version of the boost_filesystem library!)
+                AC_MSG_ERROR(Could not find a version of the Boost::Filesystem library!)
             fi
 			if test "x$link_filesystem" != "xyes"; then
 				AC_MSG_ERROR(Could not link against $ax_lib !)

build-aux/m4/ax_boost_system.m4

@@ -1,5 +1,5 @@
 # ===========================================================================
-#      http://www.gnu.org/software/autoconf-archive/ax_boost_system.html
+#     https://www.gnu.org/software/autoconf-archive/ax_boost_system.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -31,7 +31,7 @@
 #   and this notice are preserved. This file is offered as-is, without any
 #   warranty.
 
-#serial 18
+#serial 20
 
 AC_DEFUN([AX_BOOST_SYSTEM],
 [
@@ -84,7 +84,6 @@ AC_DEFUN([AX_BOOST_SYSTEM],
 
 			LDFLAGS_SAVE=$LDFLAGS
             if test "x$ax_boost_user_system_lib" = "x"; then
-                ax_lib=
                 for libextension in `ls -r $BOOSTLIBDIR/libboost_system* 2>/dev/null | sed 's,.*/lib,,' | sed 's,\..*,,'` ; do
                      ax_lib=${libextension}
 				    AC_CHECK_LIB($ax_lib, exit,
@@ -109,7 +108,7 @@ AC_DEFUN([AX_BOOST_SYSTEM],
 
             fi
             if test "x$ax_lib" = "x"; then
-                AC_MSG_ERROR(Could not find a version of the boost_system library!)
+                AC_MSG_ERROR(Could not find a version of the Boost::System library!)
             fi
 			if test "x$link_system" = "xno"; then
 				AC_MSG_ERROR(Could not link against $ax_lib !)

build-aux/m4/ax_boost_thread.m4

@@ -1,5 +1,5 @@
 # ===========================================================================
-#      http://www.gnu.org/software/autoconf-archive/ax_boost_thread.html
+#     https://www.gnu.org/software/autoconf-archive/ax_boost_thread.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -30,121 +30,158 @@
 #   and this notice are preserved. This file is offered as-is, without any
 #   warranty.
 
-#serial 27
+#serial 33
 
 AC_DEFUN([AX_BOOST_THREAD],
 [
-	AC_ARG_WITH([boost-thread],
-	AS_HELP_STRING([--with-boost-thread@<:@=special-lib@:>@],
-                   [use the Thread library from boost - it is possible to specify a certain library for the linker
-                        e.g. --with-boost-thread=boost_thread-gcc-mt ]),
+    AC_ARG_WITH([boost-thread],
+    AS_HELP_STRING([--with-boost-thread@<:@=special-lib@:>@],
+                   [use the Thread library from boost -
+                    it is possible to specify a certain library for the linker
+                    e.g. --with-boost-thread=boost_thread-gcc-mt ]),
         [
-        if test "$withval" = "no"; then
-			want_boost="no"
-        elif test "$withval" = "yes"; then
+        if test "$withval" = "yes"; then
             want_boost="yes"
             ax_boost_user_thread_lib=""
         else
-		    want_boost="yes"
-		ax_boost_user_thread_lib="$withval"
-		fi
+            want_boost="yes"
+            ax_boost_user_thread_lib="$withval"
+        fi
         ],
         [want_boost="yes"]
-	)
+    )
 
-	if test "x$want_boost" = "xyes"; then
+    if test "x$want_boost" = "xyes"; then
         AC_REQUIRE([AC_PROG_CC])
         AC_REQUIRE([AC_CANONICAL_BUILD])
-		CPPFLAGS_SAVED="$CPPFLAGS"
-		CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
-		export CPPFLAGS
+        CPPFLAGS_SAVED="$CPPFLAGS"
+        CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
+        export CPPFLAGS
 
-		LDFLAGS_SAVED="$LDFLAGS"
-		LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
-		export LDFLAGS
+        LDFLAGS_SAVED="$LDFLAGS"
+        LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
+        export LDFLAGS
 
         AC_CACHE_CHECK(whether the Boost::Thread library is available,
-					   ax_cv_boost_thread,
+                       ax_cv_boost_thread,
         [AC_LANG_PUSH([C++])
-			 CXXFLAGS_SAVE=$CXXFLAGS
+             CXXFLAGS_SAVE=$CXXFLAGS
+
+             case "x$host_os" in
+                 xsolaris )
+                     CXXFLAGS="-pthreads $CXXFLAGS"
+                     break;
+                     ;;
+                 xmingw32 )
+                     CXXFLAGS="-mthreads $CXXFLAGS"
+                     break;
+                     ;;
+                 *android* )
+                     break;
+                     ;;
+                 * )
+                     CXXFLAGS="-pthread $CXXFLAGS"
+                     break;
+                     ;;
+             esac
 
-			 if test "x$host_os" = "xsolaris" ; then
-				 CXXFLAGS="-pthreads $CXXFLAGS"
-			 elif test "x$host_os" = "xmingw32" ; then
-				 CXXFLAGS="-mthreads $CXXFLAGS"
-			 else
-				CXXFLAGS="-pthread $CXXFLAGS"
-			 fi
-			 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/thread/thread.hpp>]],
-                                   [[boost::thread_group thrds;
-                                   return 0;]])],
-                   ax_cv_boost_thread=yes, ax_cv_boost_thread=no)
-			 CXXFLAGS=$CXXFLAGS_SAVE
+             AC_COMPILE_IFELSE([
+                 AC_LANG_PROGRAM(
+                     [[@%:@include <boost/thread/thread.hpp>]],
+                     [[boost::thread_group thrds;
+                       return 0;]])],
+                 ax_cv_boost_thread=yes, ax_cv_boost_thread=no)
+             CXXFLAGS=$CXXFLAGS_SAVE
              AC_LANG_POP([C++])
-		])
-		if test "x$ax_cv_boost_thread" = "xyes"; then
-           if test "x$host_os" = "xsolaris" ; then
-			  BOOST_CPPFLAGS="-pthreads $BOOST_CPPFLAGS"
-		   elif test "x$host_os" = "xmingw32" ; then
-			  BOOST_CPPFLAGS="-mthreads $BOOST_CPPFLAGS"
-		   else
-			  BOOST_CPPFLAGS="-pthread $BOOST_CPPFLAGS"
-		   fi
+        ])
+        if test "x$ax_cv_boost_thread" = "xyes"; then
+            case "x$host_os" in
+                xsolaris )
+                    BOOST_CPPFLAGS="-pthreads $BOOST_CPPFLAGS"
+                    break;
+                    ;;
+                xmingw32 )
+                    BOOST_CPPFLAGS="-mthreads $BOOST_CPPFLAGS"
+                    break;
+                    ;;
+                *android* )
+                    break;
+                    ;;
+                * )
+                    BOOST_CPPFLAGS="-pthread $BOOST_CPPFLAGS"
+                    break;
+                    ;;
+            esac
 
-			AC_SUBST(BOOST_CPPFLAGS)
+            AC_SUBST(BOOST_CPPFLAGS)
 
-			AC_DEFINE(HAVE_BOOST_THREAD,,[define if the Boost::Thread library is available])
+            AC_DEFINE(HAVE_BOOST_THREAD,,
+                      [define if the Boost::Thread library is available])
             BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
 
-			LDFLAGS_SAVE=$LDFLAGS
+            LDFLAGS_SAVE=$LDFLAGS
                         case "x$host_os" in
                           *bsd* )
                                LDFLAGS="-pthread $LDFLAGS"
                           break;
                           ;;
                         esac
             if test "x$ax_boost_user_thread_lib" = "x"; then
-                ax_lib=
                 for libextension in `ls -r $BOOSTLIBDIR/libboost_thread* 2>/dev/null | sed 's,.*/lib,,' | sed 's,\..*,,'`; do
                      ax_lib=${libextension}
-				    AC_CHECK_LIB($ax_lib, exit,
-                                 [BOOST_THREAD_LIB="-l$ax_lib"; AC_SUBST(BOOST_THREAD_LIB) link_thread="yes"; break],
+                    AC_CHECK_LIB($ax_lib, exit,
+                                 [link_thread="yes"; break],
                                  [link_thread="no"])
-				done
+                done
                 if test "x$link_thread" != "xyes"; then
                 for libextension in `ls -r $BOOSTLIBDIR/boost_thread* 2>/dev/null | sed 's,.*/,,' | sed 's,\..*,,'`; do
                      ax_lib=${libextension}
-				    AC_CHECK_LIB($ax_lib, exit,
-                                 [BOOST_THREAD_LIB="-l$ax_lib"; AC_SUBST(BOOST_THREAD_LIB) link_thread="yes"; break],
+                    AC_CHECK_LIB($ax_lib, exit,
+                                 [link_thread="yes"; break],
                                  [link_thread="no"])
-				done
+                done
                 fi
 
             else
                for ax_lib in $ax_boost_user_thread_lib boost_thread-$ax_boost_user_thread_lib; do
-				      AC_CHECK_LIB($ax_lib, exit,
-                                   [BOOST_THREAD_LIB="-l$ax_lib"; AC_SUBST(BOOST_THREAD_LIB) link_thread="yes"; break],
+                      AC_CHECK_LIB($ax_lib, exit,
+                                   [link_thread="yes"; break],
                                    [link_thread="no"])
                   done
 
             fi
             if test "x$ax_lib" = "x"; then
-                AC_MSG_ERROR(Could not find a version of the boost_thread library!)
+                AC_MSG_ERROR(Could not find a version of the Boost::Thread library!)
             fi
-			if test "x$link_thread" = "xno"; then
-				AC_MSG_ERROR(Could not link against $ax_lib !)
-                        else
-                           case "x$host_os" in
-                              *bsd* )
-				BOOST_LDFLAGS="-pthread $BOOST_LDFLAGS"
-                              break;
-                              ;;
-                           esac
-
-			fi
-		fi
+            if test "x$link_thread" = "xno"; then
+                AC_MSG_ERROR(Could not link against $ax_lib !)
+            else
+                BOOST_THREAD_LIB="-l$ax_lib"
+                case "x$host_os" in
+                    *bsd* )
+                        BOOST_LDFLAGS="-pthread $BOOST_LDFLAGS"
+                        break;
+                        ;;
+                    xsolaris )
+                        BOOST_THREAD_LIB="$BOOST_THREAD_LIB -lpthread"
+                        break;
+                        ;;
+                    xmingw32 )
+                        break;
+                        ;;
+                    *android* )
+                        break;
+                        ;;
+                    * )
+                        BOOST_THREAD_LIB="$BOOST_THREAD_LIB -lpthread"
+                        break;
+                        ;;
+                esac
+                AC_SUBST(BOOST_THREAD_LIB)
+            fi
+        fi
 
-		CPPFLAGS="$CPPFLAGS_SAVED"
-	LDFLAGS="$LDFLAGS_SAVED"
-	fi
+        CPPFLAGS="$CPPFLAGS_SAVED"
+        LDFLAGS="$LDFLAGS_SAVED"
+    fi
 ])

build-aux/m4/ax_boost_unit_test_framework.m4

@@ -29,7 +29,7 @@
 #   and this notice are preserved. This file is offered as-is, without any
 #   warranty.
 
-#serial 21
+#serial 22
 
 AC_DEFUN([AX_BOOST_UNIT_TEST_FRAMEWORK],
 [
@@ -124,7 +124,7 @@ AC_DEFUN([AX_BOOST_UNIT_TEST_FRAMEWORK],
                done
             fi
             if test "x$ax_lib" = "x"; then
-                AC_MSG_ERROR(Could not find a version of the library!)
+                AC_MSG_ERROR(Could not find a version of the Boost::Unit_Test_Framework library!)
             fi
 			if test "x$link_unit_test_framework" != "xyes"; then
 				AC_MSG_ERROR(Could not link against $ax_lib !)

build-aux/m4/ax_check_compile_flag.m4

@@ -1,5 +1,5 @@
 # ===========================================================================
-#   http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
+#  https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -29,33 +29,12 @@
 #   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
 #   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
 #
-#   This program is free software: you can redistribute it and/or modify it
-#   under the terms of the GNU General Public License as published by the
-#   Free Software Foundation, either version 3 of the License, or (at your
-#   option) any later version.
-#
-#   This program is distributed in the hope that it will be useful, but
-#   WITHOUT ANY WARRANTY; without even the implied warranty of
-#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-#   Public License for more details.
-#
-#   You should have received a copy of the GNU General Public License along
-#   with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-#   As a special exception, the respective Autoconf Macro's copyright owner
-#   gives unlimited permission to copy, distribute and modify the configure
-#   scripts that are the output of Autoconf when processing the Macro. You
-#   need not follow the terms of the GNU General Public License when using
-#   or distributing such scripts, even though portions of the text of the
-#   Macro appear in them. The GNU General Public License (GPL) does govern
-#   all other use of the material that constitutes the Autoconf Macro.
-#
-#   This special exception to the GPL applies to versions of the Autoconf
-#   Macro released by the Autoconf Archive. When you make and distribute a
-#   modified version of the Autoconf Macro, you may extend this special
-#   exception to the GPL to apply to your modified version as well.
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved.  This file is offered as-is, without any
+#   warranty.
 
-#serial 4
+#serial 6
 
 AC_DEFUN([AX_CHECK_COMPILE_FLAG],
 [AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF