other packages expect it as <X11/xpm.h>

xpm/xpm.spec

@@ -80,13 +80,13 @@ AutoReqProv:  no
     %{l_shtool} mkdir -f -p -m 755 \
         $RPM_BUILD_ROOT%{l_prefix}/bin \
         $RPM_BUILD_ROOT%{l_prefix}/lib \
-        $RPM_BUILD_ROOT%{l_prefix}/include
+        $RPM_BUILD_ROOT%{l_prefix}/include/X11
     %{l_shtool} install -c -s -m 755 \
         cxpm/cxpm sxpm/sxpm $RPM_BUILD_ROOT%{l_prefix}/bin/
     %{l_shtool} install -c -m 644 \
         lib/libXpm.a $RPM_BUILD_ROOT%{l_prefix}/lib/
     %{l_shtool} install -c -m 644 \
-        lib/xpm.h $RPM_BUILD_ROOT%{l_prefix}/include/
+        lib/xpm.h $RPM_BUILD_ROOT%{l_prefix}/include/X11/
 
     #   determine installation files
     %{l_rpmtool} files -v -ofiles -r$RPM_BUILD_ROOT %{l_files_std}