From 18969fbc9f19fbc62d25ff2e83098c3143d77a33 Mon Sep 17 00:00:00 2001
From: Reid Spencer <rspencer@reidspencer.com>
Date: Fri, 22 Apr 2005 17:20:11 +0000
Subject: [PATCH] Implement the --enable-targets= feature of the configure
 script. The make variable TARGETS_TO_BUILD is used to determine which targets
 in lib/Target are built and which libraries are linked into llc. This
 effectively implements the feature. One item remains: disabling targets in
 the dejagnu test suite.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21450 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Makefile | 10 ++++++++--
 tools/llc/Makefile  | 48 ++++++++++++++++++++++++++++++++++-----------
 2 files changed, 45 insertions(+), 13 deletions(-)

diff --git a/lib/Target/Makefile b/lib/Target/Makefile
index 5b69f49b2eb..ae70488a4d0 100644
--- a/lib/Target/Makefile
+++ b/lib/Target/Makefile
@@ -7,8 +7,14 @@
 # 
 ##===----------------------------------------------------------------------===##
 LEVEL = ../..
-PARALLEL_DIRS = CBackend X86 SparcV8 SparcV9 PowerPC Alpha IA64 Skeleton
 LIBRARYNAME = LLVMTarget
 BUILD_ARCHIVE = 1
 
-include $(LEVEL)/Makefile.common
+# We include this early so we can access the value of TARGETS_TO_BUILD as the
+# value for PARALLEL_DIRS which must be set before Makefile.rules is included
+include $(LEVEL)/Makefile.config
+
+PARALLEL_DIRS := $(TARGETS_TO_BUILD)
+
+include $(LLVM_SRC_ROOT)/Makefile.rules
+
diff --git a/tools/llc/Makefile b/tools/llc/Makefile
index 6d7edf8efe7..8eff3c16129 100644
--- a/tools/llc/Makefile
+++ b/tools/llc/Makefile
@@ -9,22 +9,50 @@
 
 LEVEL = ../..
 TOOLNAME = llc
-USEDLIBS = \
+
+# Include this here so we can get the configuration of the targets
+# that have been configured for construction. We have to do this 
+# early so we can set up USEDLIBS properly before includeing Makefile.rules
+include $(LEVEL)/Makefile.config
+
+# We always build the C Backend and the Skeleton
+USEDLIBS := LLVMCBackend LLVMSkeleton
+
+# Check for Sparc target
+ifneq ($(strip $(filter SparcV8,$(TARGETS_TO_BUILD))),)
+USEDLIBS += \
 	LLVMSparcV9ModuloSched \
-	LLVMCBackend \
-	LLVMPowerPC \
 	LLVMSparcV8 \
 	LLVMSparcV9 \
-	LLVMX86 \
-	LLVMAlpha \
-	LLVMIA64 \
-	LLVMSkeleton \
 	LLVMSparcV9RegAlloc \
 	LLVMSparcV9InstrSched \
+	LLVMSparcV9LiveVar
+endif
+
+#Check for X86 Target
+ifneq ($(strip $(filter X86,$(TARGETS_TO_BUILD))),)
+USEDLIBS += LLVMX86
+endif
+
+#Check for PowerPC Target
+ifneq ($(strip $(filter PowerPC,$(TARGETS_TO_BUILD))),)
+USEDLIBS += LLVMPowerPC
+endif
+
+#Check for Alpha Target
+ifneq ($(strip $(filter Alpha,$(TARGETS_TO_BUILD))),)
+USEDLIBS += LLVMAlpha
+endif
+
+#Check for IA64 Target
+ifneq ($(strip $(filter IA64,$(TARGETS_TO_BUILD))),)
+USEDLIBS += LLVMIA64
+endif
+
+USEDLIBS += \
 	LLVMSelectionDAG \
 	LLVMCodeGen \
 	LLVMTarget.a \
-	LLVMSparcV9LiveVar \
 	LLVMipa.a \
 	LLVMTransforms.a \
 	LLVMScalarOpts \
@@ -37,7 +65,5 @@ USEDLIBS = \
 	LLVMbzip2 \
 	LLVMSystem.a
 
-TOOLLINKOPTS = $(PLATFORMLIBDL)
-
-include $(LEVEL)/Makefile.common
+include $(LLVM_SRC_ROOT)/Makefile.rules
 
-- 
2.34.1