configure: WARNING: Your version of Gtk+ will have problems with closing open displays. This is no problem if you just use one display, but if you use more than one and close one of them Emacs may crash. See https://gitlab.gnome.org/GNOME/gtk/issues/221 Configured for 'x86_64-slackware-linux-gnu'. Where should the build process find the source code? . What compiler should emacs be built with? gcc -O2 -fPIC Should Emacs use the GNU version of malloc? no (The GNU allocators don't work with this system configuration.) Should Emacs use a relocating allocator for buffers? no Should Emacs use mmap(2) for buffer allocation? no What window system should Emacs use? x11 What toolkit should Emacs use? GTK3 Where do we find X Windows header files? Standard dirs Where do we find X Windows libraries? Standard dirs Does Emacs use -lXaw3d? no Does Emacs use -lXpm? yes Does Emacs use -ljpeg? yes Does Emacs use -ltiff? yes Does Emacs use a gif library? yes -lgif Does Emacs use a png library? yes -lpng16 -lz Does Emacs use -lrsvg-2? yes Does Emacs use -lwebp? yes Does Emacs use -lsqlite3? yes Does Emacs use cairo? yes Does Emacs use -llcms2? yes Does Emacs use imagemagick? no Does Emacs use native APIs for images? no Does Emacs support sound? yes Does Emacs use -lgpm? yes Does Emacs use -ldbus? yes Does Emacs use -lgconf? no Does Emacs use GSettings? yes Does Emacs use a file notification library? yes -lglibc (inotify) Does Emacs use access control lists? yes -lacl Does Emacs use -lselinux? no Does Emacs use -lgnutls? yes Does Emacs use -lxml2? yes Does Emacs use -lfreetype? yes Does Emacs use HarfBuzz? yes Does Emacs use -lm17n-flt? no Does Emacs use -lotf? no Does Emacs use -lxft? no Does Emacs use -lsystemd? no Does Emacs use -ljansson? yes Does Emacs use -ltree-sitter? yes Does Emacs use the GMP library? yes Does Emacs directly use zlib? yes Does Emacs have dynamic modules support? yes Does Emacs use toolkit scroll bars? yes Does Emacs support Xwidgets? no Does Emacs have threading support in lisp? yes Does Emacs support the portable dumper? yes Does Emacs support legacy unexec dumping? no Which dumping strategy does Emacs use? pdumper Does Emacs have native lisp compiler? yes Does Emacs use version 2 of the X Input Extension? yes Does Emacs generate a smaller-size Japanese dictionary? no configure: WARNING: This configuration installs a 'movemail' program that does not retrieve POP3 email. By default, Emacs 25 and earlier installed a 'movemail' program that retrieved POP3 email via only insecure channels, a practice that is no longer recommended but that you can continue to support by using './configure --with-pop'. configure: You might want to install GNU Mailutils and use './configure --with-mailutils'. Configured for 'x86_64-slackware-linux-gnu'. Where should the build process find the source code? . What compiler should emacs be built with? gcc -O2 -fPIC Should Emacs use the GNU version of malloc? no (The GNU allocators don't work with this system configuration.) Should Emacs use a relocating allocator for buffers? no Should Emacs use mmap(2) for buffer allocation? no What window system should Emacs use? x11 What toolkit should Emacs use? GTK3 Where do we find X Windows header files? Standard dirs Where do we find X Windows libraries? Standard dirs Does Emacs use -lXaw3d? no Does Emacs use -lXpm? yes Does Emacs use -ljpeg? yes Does Emacs use -ltiff? yes Does Emacs use a gif library? yes -lgif Does Emacs use a png library? yes -lpng16 -lz Does Emacs use -lrsvg-2? yes Does Emacs use -lwebp? yes Does Emacs use -lsqlite3? yes Does Emacs use cairo? yes Does Emacs use -llcms2? yes Does Emacs use imagemagick? no Does Emacs use native APIs for images? no Does Emacs support sound? yes Does Emacs use -lgpm? yes Does Emacs use -ldbus? yes Does Emacs use -lgconf? no Does Emacs use GSettings? yes Does Emacs use a file notification library? yes -lglibc (inotify) Does Emacs use access control lists? yes -lacl Does Emacs use -lselinux? no Does Emacs use -lgnutls? yes Does Emacs use -lxml2? yes Does Emacs use -lfreetype? yes Does Emacs use HarfBuzz? yes Does Emacs use -lm17n-flt? no Does Emacs use -lotf? no Does Emacs use -lxft? no Does Emacs use -lsystemd? no Does Emacs use -ljansson? yes Does Emacs use -ltree-sitter? yes Does Emacs use the GMP library? yes Does Emacs directly use zlib? yes Does Emacs have dynamic modules support? yes Does Emacs use toolkit scroll bars? yes Does Emacs support Xwidgets? no Does Emacs have threading support in lisp? yes Does Emacs support the portable dumper? yes Does Emacs support legacy unexec dumping? no Which dumping strategy does Emacs use? pdumper Does Emacs have native lisp compiler? yes Does Emacs use version 2 of the X Input Extension? yes Does Emacs generate a smaller-size Japanese dictionary? no