arb: change openmotif to motif and bump revision

* Remove unneeded dependency on libXp and sablotron
* Add a dependency on libXi to satisfy XLIBS
* files/changeset_18439.diff dos -> unix line endings
* Update the compiler blacklist as this version of arb fails with
  anything newer than clang 13.

science/arb/Portfile

@@ -5,7 +5,7 @@ PortSystem              1.0
 name                    arb
 epoch                   2
 version                 6.0.6
-revision                4
+revision                5
 checksums               rmd160  3bc93a511a6eabb108e9811a3c66ea25182da19f \
                         sha256  8b1fc3fd11bbb05aca4731ac8803c004a4f2b6b87c11b543660d07ea349a6c21 \
                         size    13286019
@@ -39,15 +39,16 @@ conflicts               elixir
 depends_build           port:makedepend \
                         port:pkgconfig
 
-depends_lib             port:openmotif \
+depends_lib             port:motif \
                         port:lynx \
                         port:gsed \
-                        port:sablotron \
+                        path:bin/xsltproc:libxslt \
                         port:glw \
                         port:glew \
                         port:xfig \
                         port:gv \
                         port:xorg-libXaw \
+                        port:xorg-libXi \
                         port:gtime \
                         path:lib/pkgconfig/glib-2.0.pc:glib2 \
                         port:libpng \
@@ -67,7 +68,8 @@ patchfiles              patch-ARB-config.makefile.diff \
                         patch-ARB-intro.fig.diff \
                         patch-ARB-subfams.cpp.diff \
                         changeset_18439.diff \
-                        patch-ARB-arb.diff
+                        patch-ARB-arb.diff \
+                        arb-no-xprint.diff
 
 platform darwin {
     if {${os.major} < 11} {
@@ -93,7 +95,7 @@ build.env-append        PREFIX=${prefix} \
                         ARBHOME=${worksrcpath} \
                         PATH=${worksrcpath}/bin:$env(PATH)
 
-compiler.blacklist      *gcc-4.0 *gcc-4.2 {clang < 138}
+compiler.blacklist      *gcc-4.0 *gcc-4.2 {clang < 138} {clang > 1400} {macports-clang-1[456789]} macports-clang-2*
 
 build.args-append       CXX=${configure.cxx} \
                         CC=${configure.cc}

science/arb/files/arb-no-xprint.diff

@@ -0,0 +1,11 @@
+--- Makefile	2026-04-28 13:29:08.000000000 -0400
++++ Makefile	2026-04-28 13:29:22.000000000 -0400
+@@ -417,7 +417,7 @@
+ ifeq ($(DARWIN),1)
+ 	XINCLUDES += -I$(OSX_FW)/GLUT.framework/Headers -I$(OSX_FW)/OpenGL.framework/Headers -I$(OSX_SDK)/usr/include/krb5
+
+-	XLIBS := -L$(XHOME)/lib -lXm -lpng -lz -lXt -lX11 -lXext -lXp -lXmu -lXi
++	XLIBS := -L$(XHOME)/lib -lXm -lpng -lz -lXt -lX11 -lXext -lXmu -lXi
+ 	XLIBS += -Wl,-dylib_file,$(OSX_FW_OPENGL)/libGL.dylib:$(OSX_FW_OPENGL)/libGL.dylib
+ 	XLIBS += -Wl,-dylib_file,$(OSX_FW_OPENGL)/libGLU.dylib:$(OSX_FW_OPENGL)/libGLU.dylib
+ else