upgrade boost to 1.81

build-aux/m4/ax_boost_chrono.m4

@@ -33,72 +33,72 @@
 
 AC_DEFUN([AX_BOOST_CHRONO],
 [
-	AC_ARG_WITH([boost-chrono],
-	AS_HELP_STRING([--with-boost-chrono@<:@=special-lib@:>@],
+    AC_ARG_WITH([boost-chrono],
+    AS_HELP_STRING([--with-boost-chrono@<:@=special-lib@:>@],
                    [use the Chrono library from boost - it is possible to specify a certain library for the linker
                         e.g. --with-boost-chrono=boost_chrono-gcc-mt ]),
         [
         if test "$withval" = "no"; then
-			want_boost="no"
+            want_boost="no"
         elif test "$withval" = "yes"; then
             want_boost="yes"
             ax_boost_user_chrono_lib=""
         else
-		    want_boost="yes"
-		ax_boost_user_chrono_lib="$withval"
-		fi
+            want_boost="yes"
+        ax_boost_user_chrono_lib="$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::Chrono library is available,
-					   ax_cv_boost_chrono,
+                       ax_cv_boost_chrono,
         [AC_LANG_PUSH([C++])
-			 CXXFLAGS_SAVE=$CXXFLAGS
+             CXXFLAGS_SAVE=$CXXFLAGS
 
-			 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/chrono.hpp>]],
+             AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/chrono.hpp>]],
                                    [[boost::chrono::system_clock::time_point* time = new boost::chrono::system_clock::time_point; delete time;]])],
                    ax_cv_boost_chrono=yes, ax_cv_boost_chrono=no)
-			 CXXFLAGS=$CXXFLAGS_SAVE
+             CXXFLAGS=$CXXFLAGS_SAVE
              AC_LANG_POP([C++])
-		])
-		if test "x$ax_cv_boost_chrono" = "xyes"; then
-			AC_SUBST(BOOST_CPPFLAGS)
+        ])
+        if test "x$ax_cv_boost_chrono" = "xyes"; then
+            AC_SUBST(BOOST_CPPFLAGS)
 
-			AC_DEFINE(HAVE_BOOST_CHRONO,,[define if the Boost::Chrono library is available])
+            AC_DEFINE(HAVE_BOOST_CHRONO,,[define if the Boost::Chrono library is available])
             BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
 
-			LDFLAGS_SAVE=$LDFLAGS
+            LDFLAGS_SAVE=$LDFLAGS
             if test "x$ax_boost_user_chrono_lib" = "x"; then
                 for libextension in `ls $BOOSTLIBDIR/libboost_chrono*.so* $BOOSTLIBDIR/libboost_chrono*.dylib* $BOOSTLIBDIR/libboost_chrono*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_chrono.*\)\.so.*$;\1;' -e 's;^lib\(boost_chrono.*\)\.dylib.*$;\1;' -e 's;^lib\(boost_chrono.*\)\.a.*$;\1;'` ; do
                      ax_lib=${libextension}
-				    AC_CHECK_LIB($ax_lib, exit,
+                    AC_CHECK_LIB($ax_lib, exit,
                                  [BOOST_CHRONO_LIB="-l$ax_lib"; AC_SUBST(BOOST_CHRONO_LIB) link_chrono="yes"; break],
                                  [link_chrono="no"])
-				done
+                done
                 if test "x$link_chrono" != "xyes"; then
                 for libextension in `ls $BOOSTLIBDIR/boost_chrono*.dll* $BOOSTLIBDIR/boost_chrono*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^\(boost_chrono.*\)\.dll.*$;\1;' -e 's;^\(boost_chrono.*\)\.a.*$;\1;'` ; do
                      ax_lib=${libextension}
-				    AC_CHECK_LIB($ax_lib, exit,
+                    AC_CHECK_LIB($ax_lib, exit,
                                  [BOOST_CHRONO_LIB="-l$ax_lib"; AC_SUBST(BOOST_CHRONO_LIB) link_chrono="yes"; break],
                                  [link_chrono="no"])
-				done
+                done
                 fi
 
             else
                for ax_lib in $ax_boost_user_chrono_lib boost_chrono-$ax_boost_user_chrono_lib; do
-				      AC_CHECK_LIB($ax_lib, exit,
+                      AC_CHECK_LIB($ax_lib, exit,
                                    [BOOST_CHRONO_LIB="-l$ax_lib"; AC_SUBST(BOOST_CHRONO_LIB) link_chrono="yes"; break],
                                    [link_chrono="no"])
                   done
@@ -107,12 +107,12 @@ AC_DEFUN([AX_BOOST_CHRONO],
             if test "x$ax_lib" = "x"; then
                 AC_MSG_ERROR(Could not find a version of the library!)
             fi
-			if test "x$link_chrono" = "xno"; then
-				AC_MSG_ERROR(Could not link against $ax_lib !)
-			fi
-		fi
+            if test "x$link_chrono" = "xno"; then
+                AC_MSG_ERROR(Could not link against $ax_lib !)
+            fi
+        fi
 
-		CPPFLAGS="$CPPFLAGS_SAVED"
-	LDFLAGS="$LDFLAGS_SAVED"
-	fi
+        CPPFLAGS="$CPPFLAGS_SAVED"
+    LDFLAGS="$LDFLAGS_SAVED"
+    fi
 ])

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 !)