diff -ur makeall.csh makeall.csh
--- makeall.csh
+++ makeall.csh
@@ -17,7 +17,42 @@
 cd csupport
 chmod u+x mkprodct.csh; ./mkprodct.csh
 cd ..
+
 echo
+echo Linking libcspice.dylib
+echo
+if (! $?TKCOMPILER) then
+    set TKCOMPILER=clang
+endif
+if (! $?TKLINKOPTIONS) then
+    # These options are both unnecessary, but they preserve the default used
+    # downstream, important because other things will be appended to
+    # TKLINKOPTIONS later, overriding the downstream default.
+    set TKLINKOPTIONS="-m64 -lm"
+endif
+if ($?DYLIB_INSTALL_PREFIX) then
+    set DYLIB_INSTALL_PREFIX=${DYLIB_INSTALL_PREFIX}/
+else
+    set DYLIB_INSTALL_PREFIX=
+endif
+if (! $?DYLIB_VERSION) then
+    set DYLIB_VERSION=`sed -En -e 's/^ *CSPICE\.+V\.N0*([0-9]+)$/\1/p' ../doc/version.txt`.0.0
+endif
+$TKCOMPILER $TKLINKOPTIONS -dynamiclib -Wl,-all_load -install_name ${DYLIB_INSTALL_PREFIX}libcspice.${DYLIB_VERSION}.dylib -compatibility_version ${DYLIB_VERSION} -current_version ${DYLIB_VERSION} -o ../lib/libcspice.${DYLIB_VERSION}.dylib ../lib/cspice.a ../lib/csupport.a
+ln -f -s libcspice.${DYLIB_VERSION}.dylib ../lib/libcspice.dylib
+
+# Subsequent links will produce executables. Replace the static libraries with
+# empty libraries to avoid having to those linker invocations that expect these
+# to exist, while ensuring that no code will be linked from the static
+# libraries. Arrange for those links to link against libcspice.dylib instead.
+rm ../lib/cspice.a ../lib/csupport.a
+$TKCOMPILER -x c -c -o empty.o - < /dev/null
+ar -crs ../lib/cspice.a empty.o
+rm empty.o
+cp ../lib/cspice.a ../lib/csupport.a
+setenv TKLINKOPTIONS "${TKLINKOPTIONS} -L../../lib -lcspice"
+
+echo
 echo Creating brief_c
 echo
 cd brief_c
@@ -126,4 +161,5 @@
 chmod u+x mkprodct.csh; ./mkprodct.csh
 cd ..
 cd ..
+rm lib/cspice.a lib/csupport.a
 echo Toolkit Build Complete