fix for C++17, requires at least C+17

ChangeLog

@@ -1,3 +1,70 @@
+2018-10-23 21:21  
+
+	* [r126] build-in-docker.sh, mac-create-app-bundle.sh,
+	  resolve-rpmbuilddeps.sh:
+	  update buildsystem
+
+2018-09-19 11:22  
+
+	* [r125] build-in-docker.sh:
+	  fixed for build with centos / yum
+
+2018-09-19 08:21  
+
+	* [r124] build-in-docker.sh:
+	  fixed for build with opensuse tumbleweed and leap - and fedora,
+	  centos, mageia
+
+2018-09-18 14:50  
+
+	* [r123] build-in-docker.conf, build-in-docker.sh:
+	  fixed for build with opensuse tumbleweed and leap
+
+2018-09-17 13:08  
+
+	* [r122] INSTALL, build-in-docker.sh:
+	  support opensuse tumbleweed
+
+2018-09-11 10:12  
+
+	* [r121] INSTALL, ax_init_standard_project.m4, build-in-docker.sh:
+	  fix installation check after package build
+
+2018-09-10 21:28  
+
+	* [r120] ax_init_standard_project.m4, build-in-docker.sh:
+	  add check whether built package can be installed
+
+2018-09-10 11:26  
+
+	* [r119] ax_check_qt.m4, ax_init_standard_project.m4, bootstrap.sh,
+	  build-in-docker.sh, debian/control.in, mac-create-app-bundle.sh:
+	  fixed dependency-bug in ubuntu cosmic and stretch
+
+2018-07-16 13:53  
+
+	* [r118] INSTALL, ax_check_qt.m4, ax_init_standard_project.m4,
+	  build-in-docker.sh, mac-create-app-bundle.sh:
+	  fix build for buster
+
+2018-07-05 08:26  
+
+	* [r117] INSTALL, bootstrap.sh, build-in-docker.sh,
+	  libxml-cxx.spec.in:
+	  fixed rpm build for all distros
+
+2018-06-22 14:45  
+
+	* [r116] bootstrap.sh, libxml-cxx.spec.in, resolve-rpmbuilddeps.sh:
+	  fixed rpm build
+
+2018-06-20 13:05  
+
+	* [r115] ChangeLog, ax_init_standard_project.m4,
+	  build-in-docker.sh, mac-create-app-bundle.sh,
+	  resolve-debbuilddeps.sh:
+	  fixed build for mageia
+
 2018-04-04 19:45  
 
 	* [r114] ChangeLog, bootstrap.sh, build-in-docker.sh: