build: make 'clean' target an alias for 'purge' #2819
Merged
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Autotools and many handwritten Makefiles only provide a 'clean' target, which typically removes everything. However, the 'clean' target here does not fully do this, leaving some artifacts behind after it is run. This leads to confusion when, after cleaning, the build step still doesn't reflect configuration changes such as newly installed libraries.
Therefore, update the 'clean' target to behave like the 'purge' step.