For PR614:
Move the implementation of the fix from Makefile.rules to Makefile. This
ensures that it is only checked on a top-level rebuild, and not in every
single subdirectory. This removes some annoying messages from the build and
numerous executions of config.status if the .in file changes but not
substantively enough to cause the .h file to be modified by config.status.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23039 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile b/Makefile
index 818128e..b474a3a 100644
--- a/Makefile
+++ b/Makefile
@@ -51,3 +51,21 @@
tools-only: all
libs-only: all
+
+#------------------------------------------------------------------------
+# Make sure the generated headers are up-to-date. This must be kept in
+# sync with the AC_CONFIG_HEADER invocations in autoconf/configure.ac
+#------------------------------------------------------------------------
+FilesToConfig := \
+ include/llvm/Config/config.h \
+ include/llvm/Support/DataTypes.h \
+ include/llvm/ADT/hash_map \
+ include/llvm/ADT/hash_set \
+ include/llvm/ADT/iterator
+FilesToConfigPATH := $(addprefix $(LLVM_OBJ_ROOT)/,$(FilesToConfig))
+
+all-local:: $(FilesToConfigPATH)
+$(FilesToConfigPATH) : $(LLVM_OBJ_ROOT)/% : $(LLVM_SRC_ROOT)/%.in
+ $(Echo) Regenerating $*
+ $(Verb) cd $(LLVM_OBJ_ROOT) && $(ConfigStatusScript) $*
+.PRECIOUS: $(FilesToConfigPATH)