Ticket #313: llvm-3.0-srcdirv2.diff

Makefile.config.in

@@ -46 +46 @@
 PROJ_OBJ_DIR  := $(call realpath, .)
 PROJ_OBJ_ROOT := $(call realpath, $(PROJ_OBJ_DIR)/$(LEVEL))
 
+CLANG_SRC_ROOT  := @CLANG_SRC_ROOT@
+
 ifeq ($(PROJECT_NAME),llvm)
 LLVM_SRC_ROOT   := $(call realpath, @abs_top_srcdir@)
 LLVM_OBJ_ROOT   := $(call realpath, @abs_top_builddir@)
 PROJ_SRC_ROOT   := $(LLVM_SRC_ROOT)
-PROJ_SRC_DIR    := $(call realpath, $(LLVM_SRC_ROOT)/$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR)))
+PROJ_SRC_DIR    := $(LLVM_SRC_ROOT)$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR))
+
+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))
+endif
+
 prefix          := @prefix@
 PROJ_prefix     := $(prefix)
 PROJ_VERSION    := $(LLVMVersion)

Makefile.rules

@@ -806 +806 @@
 # Handle the OPTIONAL_PARALLEL_DIRS options for optional parallel construction
 #-----------------------------------------------------------
 ifdef OPTIONAL_PARALLEL_DIRS
-  PARALLEL_DIRS += $(foreach T,$(OPTIONAL_PARALLEL_DIRS),$(shell test -d $(PROJ_SRC_DIR)/$(T) && echo "$(T)"))
+  PARALLEL_DIRS += $(foreach T,$(OPTIONAL_PARALLEL_DIRS),$(shell test -d $(PROJ_SRC_DIR)/$(T) -o -f $(T)/Makefile && echo "$(T)"))
 endif
 
 #-----------------------------------------------------------
@@ -828 +828 @@
 ParallelTargets := $(foreach T,$(RecursiveTargets),%/.make$(T))
 
 $(ParallelTargets) :
-        $(Verb) if ([ ! -f $(@D)/Makefile ] || \
-                    command test $(@D)/Makefile -ot \
-                      $(PROJ_SRC_DIR)/$(@D)/Makefile ); then \
-          $(MKDIR) $(@D); \
-          $(CP) $(PROJ_SRC_DIR)/$(@D)/Makefile $(@D)/Makefile; \
+        $(Verb) \
+          SD=$(PROJ_SRC_DIR)/$(@D); \
+          DD=$(@D); \
+          if [ ! -f $$SD/Makefile ]; then \
+            SD=$(@D); \
+            DD=$(notdir $(@D)); \
+          fi; \
+          if ([ ! -f $$DD/Makefile ] || \
+                    command test $$DD/Makefile -ot \
+                      $$SD/Makefile ); then \
+          $(MKDIR) $$DD; \
+          $(CP) $$SD/Makefile $$DD/Makefile; \
         fi; \
-        $(MAKE) -C $(@D) $(subst $(@D)/.make,,$@)
+        $(MAKE) -C $$DD $(subst $(@D)/.make,,$@)
 endif
 
 #---------------------------------------------------------

autoconf/configure.ac

@@ -795 +795 @@
   *) AC_MSG_ERROR([Invalid path for --with-ocaml-libdir. Provide full path]) ;;
 esac
 
+AC_ARG_WITH(clang-srcdir,
+  AS_HELP_STRING([--with-clang-srcdir],
+    [Directory to the out-of-tree Clang source]),,
+    withval="-")
+case "$withval" in
+  -) clang_src_root="" ;;
+  /* | [[A-Za-z]]:[[\\/]]*) clang_src_root="$withval" ;;
+  *) clang_src_root="$ac_pwd/$withval" ;;
+esac
+AC_SUBST(CLANG_SRC_ROOT,[$clang_src_root])
+
 AC_ARG_WITH(clang-resource-dir,
   AS_HELP_STRING([--with-clang-resource-dir],
     [Relative directory from the Clang binary for resource files]),,

test/Makefile

@@ -59 +59 @@
 
 ifneq ($(strip $(filter check-local-all,$(MAKECMDGOALS))),)
 ifndef TESTSUITE
-ifeq ($(shell test -d $(PROJ_SRC_DIR)/../tools/clang && echo OK), OK)
+ifeq ($(shell test -f $(PROJ_OBJ_DIR)/../tools/clang/Makefile && echo OK), OK)
 LIT_ALL_TESTSUITES += $(PROJ_OBJ_DIR)/../tools/clang/test
 
 # Force creation of Clang's lit.site.cfg.

tools/Makefile

@@ -9 +9 @@
 
 LEVEL := ..
 
+include $(LEVEL)/Makefile.config
+
 # Build clang if present.
-OPTIONAL_PARALLEL_DIRS := clang
+
+ifneq ($(CLANG_SRC_ROOT),)
+  OPTIONAL_PARALLEL_DIRS := $(CLANG_SRC_ROOT)
+else
+  OPTIONAL_PARALLEL_DIRS := clang
+endif
 
 # Build LLDB if present. Note LLDB must be built last as it depends on the
 # wider LLVM infrastructure (including Clang).
@@ -36 +43 @@
   PARALLEL_DIRS := $(filter-out lldb,$(ONLY_TOOLS))
 endif
 
-include $(LEVEL)/Makefile.config
-
-
 # These libraries build as dynamic libraries (.dylib /.so), they can only be
 # built if ENABLE_PIC is set.
 ifndef ONLY_TOOLS