We already use __VA_OPT__ in multiple places, which was introduced in
gcc 8 [0], so let's bump the baseline to reflect that. I chose gcc 8.4,
as that was the lowest 8.x version I could easily get my hands on when I
verified this (on Ubuntu Focal with the gcc-8 package).
Closes: #31191
[0] https://gcc.gnu.org/gcc-8/changes.html
pyelftools (optional, required for systemd-boot)
meson >= 0.60.0
ninja
- gcc >= 4.7
+ gcc >= 8.4
awk, sed, grep, and similar tools
clang >= 10.0, llvm >= 10.0 (optional, required to build BPF programs
from source code in C)