build/Make: Define a TARGET_NATIVE_ARCH variable to be a bit more pre…

…cise than

ARCH, which gets tested in many more contexts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144434 91177308-0d34-0410-b5e6-96231b3b80d8

Makefile

@@ -126,7 +126,7 @@ cross-compile-build-tools:
 	 $(MAKE) -C BuildTools \
 	  BUILD_DIRS_ONLY=1 \
 	  UNIVERSAL= \
-	  ARCH="$(ARCH)" \
+	  TARGET_NATIVE_ARCH="$(TARGET_NATIVE_ARCH)" \
 	  TARGETS_TO_BUILD="$(TARGETS_TO_BUILD)" \
 	  ENABLE_OPTIMIZED=$(ENABLE_OPTIMIZED) \
 	  ENABLE_PROFILING=$(ENABLE_PROFILING) \

Makefile.config.in

@@ -107,6 +107,7 @@ TARGET_OS=@TARGET_OS@
 
 # Target hardware architecture
 ARCH=@ARCH@
+TARGET_NATIVE_ARCH := $(ARCH)
 
 # Indicates, whether we're cross-compiling LLVM or not
 LLVM_CROSS_COMPILING=@LLVM_CROSS_COMPILING@

Makefile.rules

@@ -81,6 +81,11 @@ LLVMBuildMakeFrag := $(PROJ_OBJ_ROOT)/Makefile.llvmbuild
 LLVMConfigLibraryDependenciesInc := \
 	$(PROJ_OBJ_ROOT)/tools/llvm-config-2/LibraryDependencies.inc
 
+# This is for temporary backwards compatibility.
+ifndef TARGET_NATIVE_ARCH
+TARGET_NATIVE_ARCH := $(ARCH)
+endif
+
 # The rule to create the LLVMBuild Makefile fragment as well as the llvm-config
 # library table.
 #
@@ -92,7 +97,7 @@ LLVMConfigLibraryDependenciesInc := \
 $(LLVMBuildMakeFrag): $(PROJ_SRC_ROOT)/Makefile.rules
 	$(Echo) Constructing LLVMBuild project information.
 	$(Verb) $(LLVMBuildTool) \
-	  --native-target "$(ARCH)" \
+	  --native-target "$(TARGET_NATIVE_ARCH)" \
 	  --enable-targets "$(TARGETS_TO_BUILD)" \
 	  --write-library-table $(LLVMConfigLibraryDependenciesInc) \
 	  --write-make-fragment $(LLVMBuildMakeFrag)