add a proper way to make platform-dependent code, update readme with compilation instructions

1 files changed, 17 insertions, 0 deletions

diff --git a/sh/platdep.sh b/sh/platdep.sh
new file mode 100755
index 0000000..dda0588
--- /dev/null
+++ b/sh/platdep.sh
@@ -0,0 +1,17 @@
+#! /bin/sh
+
+# Of all the available platform-dependent object file sets defined in the 
+# working directory's make file of the form 'OBJS_...', list all those that
+# could be relevant to the current platform.
+
+keywords=$(uname -a)
+
+sets=""
+for k in $keywords
+do
+	sets="$sets\n$(echo "$k" | tr '[:lower:]' '[:upper:]' | xargs -I '%' grep '^OBJS_%[ =]' Makefile)"
+	
+done
+
+echo "$sets" | sort | uniq | awk '/\n\n/ { print '\n' }'
+