GNU Make notes

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+# README
+
+Creates a graph of dependencies from GNU-Make using [make2graph](https://github.com/lindenb/makefile2graph).
+
+```console
+git clone https://github.com/lindenb/makefile2graph.git
+cd makefile2graph
+make
+./make2graph --version
+```
+```
+1.5.0
+```
+
+Install `graphviz`.
+
+```console
+sudo apt update
+sudo apt install -y graphviz
+```
+
+`make`
+
+* -B, --always-make
+    * Unconditionally make all targets.
+* -n, --just-print, --dry-run, --recon
+    * Print the commands that would be executed, but do not execute them (except in certain circumstances).
+* -d
+    * Print debugging information in addition to normal processing.
+
+```console
+make -Bnd | ./make2graph | dot -Tpng -o out.png
+```
+
+![](out.png)