From ae9b8d637bae923bf8069f5e0f9bdb327bb98559 Mon Sep 17 00:00:00 2001
From: David Kastrup <dak@gnu.org>
Date: Thu, 22 Dec 2011 19:41:26 +0100
Subject: [PATCH] Make parser.cc and parser.hh independently to lessen parallel
 build problems.

---
 lily/GNUmakefile                 | 3 +--
 stepmake/stepmake/c++-rules.make | 9 +++++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/lily/GNUmakefile b/lily/GNUmakefile
index 9926316a55..71073ce6af 100644
--- a/lily/GNUmakefile
+++ b/lily/GNUmakefile
@@ -14,7 +14,6 @@ MODULE_CXXFLAGS= -Wno-pmf-conversions
 HELP2MAN_EXECS = lilypond
 STEPMAKE_TEMPLATES=c c++ executable po help2man
 
-# list parser.hh first: making parser.hh removes parser.cc
 OUT_DIST_FILES=$(addprefix $(outdir)/,parser.hh parser.cc)
 
 include $(depth)/make/stepmake.make
@@ -64,7 +63,7 @@ $(outdir)/lilypond: $(outdir)/libstdc++.a
 endif
 
 # force these: Make can't know these have to be generated in advance
-$(outdir)/lily-parser.o: $(outdir)/parser.hh
+$(outdir)/lily-parser.o $(outdir)/parser.o: $(outdir)/parser.hh
 $(outdir)/lily-lexer.o: $(outdir)/parser.hh $(outdir)/FlexLexer.h
 $(outdir)/lexer.o: $(outdir)/parser.hh $(outdir)/version.hh
 
diff --git a/stepmake/stepmake/c++-rules.make b/stepmake/stepmake/c++-rules.make
index 25c1d1207a..a368f4f666 100644
--- a/stepmake/stepmake/c++-rules.make
+++ b/stepmake/stepmake/c++-rules.make
@@ -12,8 +12,13 @@ $(outdir)/%.lo: %.cc
 $(outdir)/%.lo: $(outdir)/%.cc
 	$(DO_LO_DEP) $(CXX) -c $(ALL_CXXFLAGS) $(PIC_FLAGS) -o $@ $<
 
-$(outdir)/%.cc $(outdir)/%.hh: %.yy
-	$(BISON) -d -o $(subst .hh,.cc,$@)  $<
+$(outdir)/%.cc: %.yy
+	$(BISON) -o $@  $<
+
+$(outdir)/%.hh: %.yy
+	$(BISON) -o $(subst .hh,-tmp.cc,$@) -d  $<
+	rm $(subst .hh,-tmp.cc,$@)
+	mv $(subst .hh,-tmp.hh,$@) $@
 
 $(outdir)/%.cc: %.ll
 	$(FLEX) -Cfe -p -p -o$@ $<
-- 
2.39.2