The NetBSD operating system is famous for running on a wide variety of CPU architectures. While this portability is very useful, it means upgrading the compiler and related code development tools can be a tricky process requiring lots of review. Matthew Green has announced that he is working on upgrading the NetBSD ports compiler to version 7 of the GNU Compiler Collection (GCC) and has invited people to test the transition: "I plan to switch amd64 and arm64 to GCC 7 soon. i386, sparc, mips, ppc, and alpha are probably ready and tested enough for anyone else to try out. 32-bit arm is only just now working so not well tested yet. hppa, m68k, vax, and sh3 all build but have not been tested yet. ia64 and ppc64 are currently not building, and I haven't looked at the hopefully revived riscv port yet, or the or1k. If you'd like to test now from -current, build a clean tree with 'build.sh -V HAVE_GCC=7'. It should just work." A list of the optimizations and other improvements in GCC 7 can be found on the compiler's Changes page.
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