Add infrastructure for simple C-based tools

.gitignore

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+.make-and-exec-binaries

.make-and-exec

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+#!/bin/bash
+# Usage: create a file foo.c, make foo a symlink to this script
+# When foo is executed, this script silently compiles foo.c into .make-and-exec-binaries/foo and execs that with the arguments provided.
+# The compilation goes through make, so later invocations directly exec the binary with little delay.
+# To customise the compilation, you can set a CFLAGS env var before running foo.
+set -e
+name="$(basename "$0")"
+cd "$(dirname "$0")"
+make --file .make-and-exec-Makefile --silent ".make-and-exec-binaries/${name}"
+exec "./.make-and-exec-binaries/${name}" "$@"

.make-and-exec-Makefile

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+.make-and-exec-binaries/%: %.c .%-test
+	mkdir -p .make-and-exec-binaries
+	$(CC) -O3 -o $@ $< $(CFLAGS)
+	./.$(notdir $(@))-test