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Make Bison parser conflicts errors

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Bison reports shift/reduce and reduce/reduce parser conflicts as warnings by
default. This allows parser changes to introduce new conflicts while the normal
build still succeeds.

Pass the conflict warning classes as errors to Bison when generating the
parsers. This makes the regular build fail if either parser has unresolved
conflicts.

Signed-off-by: Lars-Peter Clausen <[email protected]>
This commit is contained in:
Lars-Peter Clausen
2026-07-05 21:36:03 -07:00
parent ff0b4a3154
commit 2cef311be2
1 changed files with 3 additions and 2 deletions
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Makefile.in
+3 -2
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@@ -85,6 +85,7 @@ INSTALL_PROGRAM = @INSTALL_PROGRAM@
INSTALL_DATA = @INSTALL_DATA@
LEX = @LEX@
YACC = @YACC@
YACC_CONFLICT_FLAGS = -Werror=conflicts-sr -Werror=conflicts-rr
MAN = @MAN@
PS2PDF = @PS2PDF@
GROFF = @GROFF@
@@ -241,10 +242,10 @@ parse.o: parse.cc
# Use pattern rules to avoid parallel build issues (see pr3462585)
parse%cc parse%h: $(srcdir)/parse%y
$(YACC) --verbose -t -p VL --defines=parse.h -o parse.cc $<
$(YACC) --verbose $(YACC_CONFLICT_FLAGS) -t -p VL --defines=parse.h -o parse.cc $<
syn-rules.cc: $(srcdir)/syn-rules.y
$(YACC) --verbose -t -p syn_ -o $@ $<
$(YACC) --verbose $(YACC_CONFLICT_FLAGS) -t -p syn_ -o $@ $<
lexor.cc: $(srcdir)/lexor.lex
$(LEX) -s -t $< > $@