Update cheatsheets

mk

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mk
+
+> Task runner for targets described in Mkfile.
+> Mostly used to control the compilation of an executable from source code.
+> More information: <http://doc.cat-v.org/plan_9/4th_edition/papers/mk>.
+
+- Call the first target specified in the Mkfile (usually named "all"):
+
+`mk`
+
+- Call a specific target:
+
+`mk {{target}}`
+
+- Call a specific target, executing 4 jobs at a time in parallel:
+
+`NPROC=4 mk {{target}}`
+
+- Force mking of a target, even if source files are unchanged:
+
+`mk -w{{target}} {{target}}`
+
+- Assume all targets to be out of date. Thus, update `target` and all of its dependencies:
+
+`mk -a {{target}}`
+
+- Keep going as far as possible on error:
+
+`mk -k`