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Faster ISO builds (69 s to 9 s) and a faster write.sh check

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make iso recompiled the kernel and every command each time: iso and
ramroot wiped build/kernel, build/lib and build/cmd to make sure nothing
was compiled for the wrong RAMROOT setting. Only kernel/proc/proc.c and
kernel/dev/ramdisk.c read RAMDISK_ROOT, so only their objects go now.

Even then a no-op make iso took 69 s, because sysroot.stamp lists every
staged file with its mtime and two things re-copied files on every run:
the plain cp in etc-install (now cp -p) and fastfetch's install (now
install -C). A changed stamp rebuilds the Alpine root, the root image
and its zstd -19 compression. A no-op, and a one-file kernel change,
now take about 9 s.

write.sh read the stick back with a buffered cmp, slowly and possibly from
the page cache. It now reads 4 MB at a time with iflag=direct, which
checks the stick itself; --no-verify skips the check.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015f73FesGZGYPkmDvUcj6QX
This commit is contained in:
Nexoniarz 2026-10-25 19:28:03 +01:00
commit 7d2eca8271
3 changed files with 38 additions and 16 deletions
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2
ports/fastfetch/Makefile
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@ -91,7 +91,7 @@ $(BUILDDIR)/fastfetch: $(BUILDDIR)/toolchain.cmake
build: $(BUILDDIR)/fastfetch
install: $(BUILDDIR)/fastfetch | $(SYSROOT)/bin
install -m 0755 $(BUILDDIR)/fastfetch $(SYSROOT)/bin/fastfetch
install -C -m 0755 $(BUILDDIR)/fastfetch $(SYSROOT)/bin/fastfetch
clean:
rm -rf $(PORTDIR)