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4262c5b1ee
Back-patch commit 72b1e3a21 into the pre-9.6 branches.
As noted in the original commit, this has some extra benefits: we can
narrow the scope of the -Wno-error flag that's forced on scan.c. Also,
since these grammar and lexer files are so large, splitting them into
separate build targets should have some advantages in build speed,
particularly in parallel or ccache'd builds.
However, the real reason for doing this now is that it avoids symbol-
redefinition warnings (or worse) with the latest version of flex.
It's not unreasonable that people would want to compile our old branches
with recent tools. Per report from Дилян Палаузов.
Discussion: https://postgr.es/m/d845c1af-e18d-6651-178f-9f08cdf37e10@aegee.org
53 lines
1.6 KiB
Makefile
53 lines
1.6 KiB
Makefile
#-------------------------------------------------------------------------
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#
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# Makefile for parser
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#
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# src/backend/parser/Makefile
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#
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#-------------------------------------------------------------------------
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subdir = src/backend/parser
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top_builddir = ../../..
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include $(top_builddir)/src/Makefile.global
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override CPPFLAGS := -I. -I$(srcdir) $(CPPFLAGS)
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OBJS= analyze.o gram.o scan.o keywords.o kwlookup.o parser.o \
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parse_agg.o parse_clause.o parse_coerce.o parse_collate.o parse_cte.o \
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parse_expr.o parse_func.o parse_node.o parse_oper.o parse_param.o \
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parse_relation.o parse_target.o parse_type.o parse_utilcmd.o scansup.o
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include $(top_srcdir)/src/backend/common.mk
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# Latest flex causes warnings in this file.
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ifeq ($(GCC),yes)
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scan.o: CFLAGS += -Wno-error
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endif
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# There is no correct way to write a rule that generates two files.
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# Rules with two targets don't have that meaning, they are merely
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# shorthand for two otherwise separate rules. To be safe for parallel
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# make, we must chain the dependencies like this. The semicolon is
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# important, otherwise make will choose the built-in rule for
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# gram.y=>gram.c.
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gram.h: gram.c ;
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gram.c: BISONFLAGS += -d
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gram.c: BISON_CHECK_CMD = $(PERL) $(srcdir)/check_keywords.pl $< $(top_srcdir)/src/include/parser/kwlist.h
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scan.c: FLEXFLAGS = -CF -p -p
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scan.c: FLEX_NO_BACKUP=yes
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# Force these dependencies to be known even without dependency info built:
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gram.o scan.o keywords.o parser.o: gram.h
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# gram.c, gram.h, and scan.c are in the distribution tarball, so they
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# are not cleaned here.
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clean distclean maintainer-clean:
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rm -f lex.backup
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