[deng]

I will not restrict myself to an arcane subset of Make just because you refuse to type 'gmake' instead of 'make'. Parallel execution, pattern rules, order-only prerequisites, includes, not to mention the dozens of useful function like (not)dir, (pat)subst, info... There's a reason why most POSIX Makefiles nowadays are generated. It's not GNU's fault that POSIX is stale.

EDIT: There's one exception, and that would be using Guile as an extension language, as that is often not available. However, thanks to conditionals (also not in POSIX, of course), it can be used optionally. I once sped up a Windows build by an order of magnitude by implementing certain things in Guile instead of calling shell (which is notoriously slow on Windows).

[Tor3]

Agreed. My company decided on using GNU Make on every platform we supported, which back then (last century) was a bunch of Unix variants, and Linux. That made it possible to write a simple and portable build system which could be used for everything we did, no hassle. And not difficult, because gmake was available basically everywhere, then just as now.

[matheusmoreira]

Completely agree. POSIX is irrelevant anyway. Every single unixlike has unique features that are vastly superior to whatever legacy happens to be standardized by POSIX. Avoiding their use leads to nothing but misery.