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* contributing: add guidelines for including changelogsRobin Jarry2023-08-241-0/+3
| | | | | | | | | | Recently there were several contributors that included their changelog in the commit message and/or didn't include a changelog at all. Add comprehensive guidelines to help people figuring the email-based review workflow. Signed-off-by: Robin Jarry <robin@jarry.cc> Acked-by: Moritz Poldrack <moritz@poldrack.dev>
* mk: deprecate BSD make in favor of GNU makeRobin Jarry2023-08-111-0/+199
Being portable between BSD and GNU make is a nightmare. It restricts features to a very minimal surface and in turn requires a lot of code duplication and manual updating of file lists. Worse, aerc's makefile relies on the shell assignment operator (!=) which has been supported by BSD make 2.2 since 1997 but GNU make 4.0 since 2013. Unfortunately, MacOS runs GNU make 3.8 which does not have that feature. Reducing the feature set even more. Stop that nonsense and remove BSD make compatibility. The majority of aerc's users either run a GNU Linux distribution or MacOS. For those who run any *BSD variant, it is easy for them to install GNU make (gmake) if they don't have it installed already. Use GNU make constructs to generate build and install rules dynamically based on source files discovery. GNU make will use "GNUmakefile" in priority over "Makefile" if possible. Leverage this to display an explicit message when other flavours of make are used. Leave a "Makefile" with a .DEFAULT: target and rename the actual file to "GNUmakefile". Signed-off-by: Robin Jarry <robin@jarry.cc> Acked-by: Moritz Poldrack <moritz@poldrack.dev>