diff options
| author | Peter Eisentraut <peter_e@gmx.net> | 2001-11-16 16:32:33 +0000 |
|---|---|---|
| committer | Peter Eisentraut <peter_e@gmx.net> | 2001-11-16 16:32:33 +0000 |
| commit | aff53b27f0942cf9a0dcc5b10dca528e88b0cabf (patch) | |
| tree | 662be25b87828f619e0643fe295f92be8f45c749 /src/backend/parser | |
| parent | 7c50767f08a37d10638a6f38d0b4f42c1956e214 (diff) | |
Make the yacc rules safe for parallel make. See discussion on pgsql-patches
and comment in src/backend/parser/Makefile for the technical details.
Diffstat (limited to 'src/backend/parser')
| -rw-r--r-- | src/backend/parser/Makefile | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/src/backend/parser/Makefile b/src/backend/parser/Makefile index 62ff3098ed2..ed910f09a45 100644 --- a/src/backend/parser/Makefile +++ b/src/backend/parser/Makefile @@ -2,7 +2,7 @@ # # Makefile for parser # -# $Header: /cvsroot/pgsql/src/backend/parser/Makefile,v 1.34 2001/08/09 18:13:23 petere Exp $ +# $Header: /cvsroot/pgsql/src/backend/parser/Makefile,v 1.35 2001/11/16 16:32:33 petere Exp $ # #------------------------------------------------------------------------- @@ -20,15 +20,26 @@ all: SUBSYS.o SUBSYS.o: $(OBJS) $(LD) $(LDREL) $(LDOUT) $@ $^ -$(srcdir)/gram.c $(srcdir)/parse.h: gram.y + +# There is no correct way to write a rule that generates two files. +# Rules with two targets don't have that meaning, they are merely +# shorthand for two otherwise separate rules. To be safe for parallel +# make, we must chain the dependencies like this. The semicolon is +# important, otherwise make will choose the built-in rule for +# gram.y=>gram.c. + +$(srcdir)/gram.c: $(srcdir)/parse.h ; + +$(srcdir)/parse.h: gram.y ifdef YACC $(YACC) -d $(YFLAGS) $< - mv y.tab.c $(srcdir)/gram.c - mv y.tab.h $(srcdir)/parse.h + mv -f y.tab.c $(srcdir)/gram.c + mv -f y.tab.h $(srcdir)/parse.h else @$(missing) bison $< $@ endif + $(srcdir)/scan.c: scan.l ifdef FLEX $(FLEX) $(FLEXFLAGS) -Pbase_yy -o'$@' $< |