implement a "make no-installed" command

src/Makefile

@@ -547,6 +547,9 @@ yes-all:
 no-all:
 	@for p in $(PACKAGE); do $(MAKE) no-$$p; done
 
+no-installed:
+	@for p in $(PACKAGESORTED); do $(SHELL) Package.sh $$p info && $(MAKE) no-$$p || : ; done
+
 yes-standard yes-std:
 	@echo 'There are no more "standard" or "user" packages in LAMMPS'
 

src/Package.sh

@@ -41,6 +41,15 @@ elif (test $2 = "installed") then
     echo "Installed YES: package $1"
   fi
 
+# info, exit with true/false status depending on whether a package is installed
+
+elif (test $2 = "info") then
+  if (test $installed = 1) then
+    exit 0
+  else
+    exit 1
+  fi
+
 # update, only if installed
 # perform a re-install, but only if the package is already installed