Add missing Substitute.am

diff --git a/doc/manuals/Substitute.am b/doc/manuals/Substitute.am
new file mode 100644 (file)
index 0000000..0c9804b
--- /dev/null
+++ b/doc/manuals/Substitute.am
@@ -0,0 +1,14 @@
+
+## DEFAULT_MIME_TABLE      = $(sysconfdir)/mime.conf
+## DEFAULT_ERROR_DIR       = $(datadir)/errors
+
+SUBSTITUTE=sed "\
+       s%@DEFAULT_ERROR_DIR@%$(DEFAULT_ERROR_DIR)%g;\
+       s%@DEFAULT_MIME_TABLE@%$(DEFAULT_MIME_TABLE)%g;\
+       s%@""PACKAGE_STRING""@%$(PACKAGE_STRING)%g;\
+       s%@SYSCONFDIR@%$(sysconfdir)%g;\
+       "
+
+## Example of how to substitute:
+## squid.8: $(srcdir)/squid.8.in Makefile
+##     $(SUBSTITUTE) < $(srcdir)/squid.8.in > $@