Allow the XML2RFC GNU Make variable to be overridden by the caller

jviotti · Relequestual · commit 707431358d52 · 2022-01-18T11:22:33.000Z
It is a best practice to allow callers to override the value of these program variables. For example, with this chance, you can do: ```sh make XML2RFC=/opt/bin/xml2rfc ``` See: https://www.gnu.org/software/make/manual/make.html#Command-Variables Signed-off-by: Juan Cruz Viotti <jv@jviotti.com>
diff --git a/Makefile b/Makefile
@@ -1,4 +1,4 @@
-XML2RFC=xml2rfc
+XML2RFC ?= xml2rfc
 
 OUT = \
 	jsonschema-core.html jsonschema-core.txt \

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-XML2RFC=xml2rfc`
	`1`	`+XML2RFC ?= xml2rfc`
`2`	`2`
`3`	`3`	`OUT = \`
`4`	`4`	`jsonschema-core.html jsonschema-core.txt \`