39 lines
1.4 KiB
Diff
39 lines
1.4 KiB
Diff
|
Index: Python-3.1.2/Makefile.pre.in
|
||
|
|
===================================================================
|
||
|
|
--- Python-3.1.2.orig/Makefile.pre.in
|
||
|
|
+++ Python-3.1.2/Makefile.pre.in
|
||
|
|
@@ -215,6 +215,7 @@ IO_OBJS= \
|
||
|
|
|
||
|
|
##########################################################################
|
||
|
|
# Grammar
|
||
|
|
+GRAMMAR_STAMP= $(srcdir)/grammar-stamp
|
||
|
|
GRAMMAR_H= $(srcdir)/Include/graminit.h
|
||
|
|
GRAMMAR_C= $(srcdir)/Python/graminit.c
|
||
|
|
GRAMMAR_INPUT= $(srcdir)/Grammar/Grammar
|
||
|
|
@@ -535,9 +536,24 @@ Modules/python.o: $(srcdir)/Modules/pyth
|
||
|
|
|
||
|
|
$(IO_OBJS): $(IO_H)
|
||
|
|
|
||
|
|
-$(GRAMMAR_H) $(GRAMMAR_C): $(PGEN) $(GRAMMAR_INPUT)
|
||
|
|
+# GNU "make" interprets rules with two dependents as two copies of the rule.
|
||
|
|
+#
|
||
|
|
+# In a parallel build this can lead to pgen being run twice, once for each of
|
||
|
|
+# GRAMMAR_H and GRAMMAR_C, leading to race conditions in which the compiler
|
||
|
|
+# reads a partially-overwritten copy of one of these files, leading to syntax
|
||
|
|
+# errors (or linker errors if the fragment happens to be syntactically valid C)
|
||
|
|
+#
|
||
|
|
+# See http://www.gnu.org/software/hello/manual/automake/Multiple-Outputs.html
|
||
|
|
+# for more information
|
||
|
|
+#
|
||
|
|
+# Introduce ".grammar-stamp" as a contrived single output from PGEN to avoid
|
||
|
|
+# this:
|
||
|
|
+$(GRAMMAR_H) $(GRAMMAR_C): $(GRAMMAR_STAMP)
|
||
|
|
+
|
||
|
|
+$(GRAMMAR_STAMP): $(PGEN) $(GRAMMAR_INPUT)
|
||
|
|
-@$(INSTALL) -d Include
|
||
|
|
-$(PGEN) $(GRAMMAR_INPUT) $(GRAMMAR_H) $(GRAMMAR_C)
|
||
|
|
+ touch $(GRAMMAR_STAMP)
|
||
|
|
|
||
|
|
$(PGEN): $(PGENOBJS)
|
||
|
|
$(CC) $(OPT) $(LDFLAGS) $(PGENOBJS) $(LIBS) -o $(PGEN)
|