m4: add page (#2488)

2018-10-31 05:52:33 +05:30
parent 201bf8428e
commit 3e39c7c263
1 changed files with 11 additions and 0 deletions
--- a/pages/common/m4.md
+++ b/pages/common/m4.md
@@ -0,0 +1,11 @@
+# m4
+
+> Macro processor.
+
+- Process macros in a file:
+
+`m4 {{path/to/file}}`
+
+- Define a macro before processing files:
+
+`m4 -D{{macro_name}}={{macro_value}} {{path/to/file}}`