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mk: Avoid broken rebuild if program --help fails

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Make will happily consider a target available if it's zero sized.

When writing output files with shell redirections for commands that usually
succeed we can apply the `|| rm $@` pattern.

For commands where --help exits with failure we always rerun the recipe
instead.
This commit is contained in:
Daniel Gröber 2025-03-14 21:25:14 +01:00
parent 6884c98e08
commit de11624f42
1 changed files with 4 additions and 2 deletions
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6
Makefile
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@ -1038,7 +1038,7 @@ docs/source/generated:
# some commands return an error and print the usage text to stderr
define DOC_USAGE_STDERR
docs/source/generated/$(1): $(TARGETS) docs/source/generated
docs/source/generated/$(1): $(TARGETS) docs/source/generated FORCE
-$(Q) ./$(PROGRAM_PREFIX)$(1) --help 2> $$@
endef
DOCS_USAGE_STDERR := yosys-config yosys-filterlib
@ -1053,7 +1053,7 @@ $(foreach usage,$(DOCS_USAGE_STDERR),$(eval $(call DOC_USAGE_STDERR,$(usage))))
# others print to stdout
define DOC_USAGE_STDOUT
docs/source/generated/$(1): $(TARGETS) docs/source/generated
$(Q) ./$(PROGRAM_PREFIX)$(1) --help > $$@
$(Q) ./$(PROGRAM_PREFIX)$(1) --help > $$@ || rm $$@
endef
DOCS_USAGE_STDOUT := yosys yosys-smtbmc yosys-witness
$(foreach usage,$(DOCS_USAGE_STDOUT),$(eval $(call DOC_USAGE_STDOUT,$(usage))))
@ -1190,5 +1190,7 @@ echo-cxx:
-include kernel/*.d
-include techlibs/*/*.d
FORCE:
.PHONY: all top-all abc test install install-abc docs clean mrproper qtcreator coverage vcxsrc
.PHONY: config-clean config-clang config-gcc config-gcc-static config-gprof config-sudo