X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=Makefile.config.in;h=7af5d3c90200f2ce1f89d5ea27fd4950af708fab;hb=3690da1dfae7d55044569485865f4024de329da1;hp=a4d641040f336a781264be1d3433d28164ba887a;hpb=598eeb5703730e132415645c1ef32dafa5dc5d00;p=oota-llvm.git

diff --git a/Makefile.config.in b/Makefile.config.in
index a4d641040f3..7af5d3c9020 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -58,6 +58,22 @@ LLVM_OBJ_ROOT   := $(call realpath, @abs_top_builddir@)
 PROJ_SRC_ROOT   := $(LLVM_SRC_ROOT)
 PROJ_SRC_DIR    := $(LLVM_SRC_ROOT)$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR))
 
+# FIXME: This is temporary during the grace period where in-source builds are
+# deprecated. Convert to a hard error when that period is up.
+#
+# See: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20150323/268067.html
+ifeq ($(LLVM_SRC_ROOT), $(LLVM_OBJ_ROOT))
+  $(warning ######################################################################################)
+  $(warning #                                                                                    #)
+  $(warning #                                   WARNING                                          #)
+  $(warning #                                                                                    #)
+  $(warning #                        In-source builds are deprecated.                            #)
+  $(warning #                                                                                    #)
+  $(warning #               Please configure from a separate build directory!                    #)
+  $(warning #                                                                                    #)
+  $(warning ######################################################################################)
+endif
+
 ifneq ($(CLANG_SRC_ROOT),)
   CLANG_SRC_ROOT:= $(call realpath, $(CLANG_SRC_ROOT))
   PROJ_SRC_DIR  := $(patsubst $(LLVM_SRC_ROOT)/tools/clang%,$(CLANG_SRC_ROOT)%,$(PROJ_SRC_DIR))