Issue #15819: Fix out-of-tree builds from a readonly source.
diff --git a/Makefile.pre.in b/Makefile.pre.in
index e0356e6..6812865 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -229,8 +229,8 @@
##########################################################################
# Grammar
-GRAMMAR_H= $(srcdir)/Include/graminit.h
-GRAMMAR_C= $(srcdir)/Python/graminit.c
+GRAMMAR_H= Include/graminit.h
+GRAMMAR_C= Python/graminit.c
GRAMMAR_INPUT= $(srcdir)/Grammar/Grammar
@@ -296,9 +296,9 @@
##########################################################################
# AST
-AST_H_DIR= $(srcdir)/Include
+AST_H_DIR= Include
AST_H= $(AST_H_DIR)/Python-ast.h
-AST_C_DIR= $(srcdir)/Python
+AST_C_DIR= Python
AST_C= $(AST_C_DIR)/Python-ast.c
AST_ASDL= $(srcdir)/Parser/Python.asdl
@@ -665,9 +665,11 @@
Parser/pgenmain.o: $(srcdir)/Include/parsetok.h
$(AST_H): $(AST_ASDL) $(ASDLGEN_FILES)
+ $(MKDIR_P) $(AST_H_DIR)
$(ASDLGEN) -h $(AST_H_DIR) $(AST_ASDL)
$(AST_C): $(AST_H) $(AST_ASDL) $(ASDLGEN_FILES)
+ $(MKDIR_P) $(AST_C_DIR)
$(ASDLGEN) -c $(AST_C_DIR) $(AST_ASDL)
Python/compile.o Python/symtable.o Python/ast.o: $(GRAMMAR_H) $(AST_H)