Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
libmx-devel
libmx-devel(x86-64)
pkgconfig(mx-1.0)
pkgconfig(mx-gtk-1.0)

Requires :

/usr/bin/pkg-config
clutter-devel
gdk-pixbuf2-devel
libmx(x86-64) = 1.4.7-9.el7
libmx-1.0.so.2()(64bit)
libmx-gtk-1.0.so.0()(64bit)
pkgconfig
pkgconfig(clutter-1.0)
pkgconfig(gtk+-2.0)
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsXz) <= 5.2-1

Content of RPM :
/usr/include/mx-1.0
/usr/include/mx-1.0/mx
/usr/include/mx-1.0/mx-gtk
/usr/include/mx-1.0/mx-gtk/mx-gtk-frame.h
/usr/include/mx-1.0/mx-gtk/mx-gtk-light-switch.h
/usr/include/mx-1.0/mx-gtk/mx-gtk.h
/usr/include/mx-1.0/mx/mx-action.h
/usr/include/mx-1.0/mx/mx-actor-manager.h
/usr/include/mx-1.0/mx/mx-adjustment.h
/usr/include/mx-1.0/mx/mx-application.h
/usr/include/mx-1.0/mx/mx-bin.h
/usr/include/mx-1.0/mx/mx-box-layout-child.h
/usr/include/mx-1.0/mx/mx-box-layout.h
/usr/include/mx-1.0/mx/mx-button-group.h
/usr/include/mx-1.0/mx/mx-button.h
/usr/include/mx-1.0/mx/mx-clipboard.h
/usr/include/mx-1.0/mx/mx-combo-box.h
/usr/include/mx-1.0/mx/mx-deform-bow-tie.h
/usr/include/mx-1.0/mx/mx-deform-page-turn.h
/usr/include/mx-1.0/mx/mx-deform-texture.h
/usr/include/mx-1.0/mx/mx-deform-waves.h
/usr/include/mx-1.0/mx/mx-dialog.h
/usr/include/mx-1.0/mx/mx-draggable.h
/usr/include/mx-1.0/mx/mx-droppable.h
/usr/include/mx-1.0/mx/mx-entry.h
/usr/include/mx-1.0/mx/mx-enum-types.h
/usr/include/mx-1.0/mx/mx-expander.h
/usr/include/mx-1.0/mx/mx-fade-effect.h
/usr/include/mx-1.0/mx/mx-floating-widget.h
/usr/include/mx-1.0/mx/mx-focus-manager.h
There is 47 files more in these RPM.