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make: a clean build no longer stops at lwIP

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From a clean tree the first make failed with "no rule to make target
build/lwip/core/init.o": a pattern rule is only used when its
prerequisite exists or can be made, and before the unpack lwIP's .c
files were neither. A second make worked, which is why it went unseen.
The unpack now claims the .c files. And sysroot-install waits for it,
because its own make -C ports unpacked lwIP too, and two unzips under
-j collided.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
This commit is contained in:
Nexoniarz 2026-10-23 23:21:43 +02:00
commit c3561f9d56
1 changed files with 14 additions and 1 deletions
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15
Makefile
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@ -965,6 +965,17 @@ $(BUILD)/lwip/%.o: $(LWIPDIR)/%.c | $(LWIPDIR)
$(LWIPDIR): $(LWIPDIR):
$(MAKE) -C ports lwip $(MAKE) -C ports lwip
# And say that unpacking is what makes lwIP's .c files. Without this, a clean
# build fails at once with "no rule to make build/lwip/core/init.o": make
# picks a pattern rule only if every prerequisite exists or can be made, and
# before the unpack init.c is neither -- the order-only $(LWIPDIR) above
# would have created it, but make never gets that far. A second `make`
# worked, because by then the first had unpacked it. PRECIOUS because make
# deletes what it thinks it made along a chain of pattern rules.
$(LWIPDIR)/%.c: | $(LWIPDIR)
@test -f $@
.PRECIOUS: $(LWIPDIR)/%.c
# uACPI's headers for its own files and for kernel/acpi/, and the same # uACPI's headers for its own files and for kernel/acpi/, and the same
# configuration for both: a define seen by one side and not the other changes # configuration for both: a define seen by one side and not the other changes
# the size of structures they pass between them. Builtin string functions, # the size of structures they pass between them. Builtin string functions,
@ -1308,7 +1319,9 @@ etc-install: $(SCHINIT_JOBS) $(ETC_PLAIN) $(ETC_ZSH) $(LOGO_ASCII) $(SRV_FILES)
# not mounted over and the marker file would be visible in them. # not mounted over and the marker file would be visible in them.
SYSROOT_DIRS = dev proc sys run tmp root SYSROOT_DIRS = dev proc sys run tmp root
sysroot-install: $(addprefix $(SYSROOT)/bin/, $(CMDS)) etc-install # After lwIP is unpacked: `make -C ports` below unpacks it too, and the two
# unzips running at once under -j trip over each other.
sysroot-install: $(addprefix $(SYSROOT)/bin/, $(CMDS)) etc-install | $(LWIPDIR)
@mkdir -p $(addprefix $(SYSROOT)/, $(SYSROOT_DIRS)) @mkdir -p $(addprefix $(SYSROOT)/, $(SYSROOT_DIRS))
ifdef WINHOST ifdef WINHOST
@echo "ports: skipped (Windows host) -- musl/mksh/toybox are used as already staged in $(SYSROOT)" @echo "ports: skipped (Windows host) -- musl/mksh/toybox are used as already staged in $(SYSROOT)"