[run-time] Provide and use LFLAGS for linking LLVM.

* sources/lib/run-time/Makefile.in: Provide PLATFORM_LFLAGS,
    LLVM_LFLAGS and LFLAGS. Use them when generating .o from .bc
    to avoid warnings about unused arguments from the CFLAGS.

sources/lib/run-time/Makefile.in

@@ -48,49 +48,58 @@ ifeq ($(OPEN_DYLAN_TARGET_PLATFORM),x86-linux)
   PLATFORM_CFLAGS=-m32 -D_REENTRANT=1 -D_GNU_SOURCE \
     -DOPEN_DYLAN_PLATFORM_LINUX -DOPEN_DYLAN_PLATFORM_UNIX \
     -DOPEN_DYLAN_ARCH_X86
+  PLATFORM_LFLAGS=-m32
   PLATFORM_RUNTIME_LIBRARIES+=$(HARP_RUNTIME_LIBRARY)
   PLATFORM_INSTALL_RUNTIMES+=install-harp-runtime
 else ifeq ($(OPEN_DYLAN_TARGET_PLATFORM),x86_64-linux)
   PLATFORM_CFLAGS=-m64 -fPIC -D_REENTRANT=1 -D_GNU_SOURCE \
     -DOPEN_DYLAN_PLATFORM_LINUX -DOPEN_DYLAN_PLATFORM_UNIX \
     -DOPEN_DYLAN_ARCH_X86_64
+  PLATFORM_LFLAGS=-m64 -fPIC
 else ifeq ($(OPEN_DYLAN_TARGET_PLATFORM),arm-linux)
   PLATFORM_CFLAGS=-fPIC -D_REENTRANT=1 -D_GNU_SOURCE \
     -DOPEN_DYLAN_PLATFORM_LINUX -DOPEN_DYLAN_PLATFORM_UNIX \
     -DOPEN_DYLAN_ARCH_ARM
+  PLATFORM_LFLAGS=-fPIC
 else ifeq ($(OPEN_DYLAN_TARGET_PLATFORM),x86-freebsd)
   PLATFORM_CFLAGS=-m32 -D_REENTRANT=1 \
     -DOPEN_DYLAN_PLATFORM_FREEBSD -DOPEN_DYLAN_PLATFORM_UNIX \
     -DOPEN_DYLAN_ARCH_X86
+  PLATFORM_LFLAGS=-m32
   PLATFORM_RUNTIME_LIBRARIES+=$(HARP_RUNTIME_LIBRARY)
   PLATFORM_INSTALL_RUNTIMES+=install-harp-runtime
 else ifeq ($(OPEN_DYLAN_TARGET_PLATFORM),x86_64-freebsd)
   PLATFORM_CFLAGS=-m64 -fPIC -D_REENTRANT=1 \
     -DOPEN_DYLAN_PLATFORM_FREEBSD -DOPEN_DYLAN_PLATFORM_UNIX \
     -DOPEN_DYLAN_ARCH_X86_64
+  PLATFORM_LFLAGS=-m64 -fPIC
 else ifeq ($(OPEN_DYLAN_TARGET_PLATFORM),x86-darwin)
   PLATFORM_CFLAGS=-arch i386 -D_REENTRANT=1 \
     -DOPEN_DYLAN_PLATFORM_DARWIN -DOPEN_DYLAN_PLATFORM_UNIX \
     -DOPEN_DYLAN_ARCH_X86 -Wno-unknown-attributes
+  PLATFORM_LFLAGS=-arch i386
   DARWIN=yes
 else ifeq ($(OPEN_DYLAN_TARGET_PLATFORM),x86_64-darwin)
   PLATFORM_CFLAGS=-arch x86_64 -D_REENTRANT=1 \
     -DOPEN_DYLAN_PLATFORM_DARWIN -DOPEN_DYLAN_PLATFORM_UNIX \
     -DOPEN_DYLAN_ARCH_X86_64 -Wno-unknown-attributes
+  PLATFORM_LFLAGS=-arch x86_64
   DARWIN=yes
 endif
 
 CC = @CC@
 AR = ar -rcs
 
 CFLAGS		= $(PLATFORM_CFLAGS) -Wall -O -g -I$(srcdir)
+LFLAGS		= $(PLATFORM_LFLAGS)
 
 HARP_CFLAGS     = -DOPEN_DYLAN_BACKEND_HARP
 
 LLVM_CFLAGS     = -DOPEN_DYLAN_BACKEND_LLVM \
 	          -DOPEN_DYLAN_RUNTIME_HEADER=\"llvm-$(OPEN_DYLAN_TARGET_PLATFORM)-runtime.h\" \
 		  -I. \
 		  -fexceptions
+LLVM_LFLAGS     = -fexceptions
 
 C_CFLAGS        = -DOPEN_DYLAN_BACKEND_C
 
@@ -180,7 +189,7 @@ $(OBJDIR_LLVM)/%.o: %.c $(LLVM_RUNTIME_HEADER)
 
 $(OBJDIR_LLVM)/%.o: %.bc
 	mkdir -p $(OBJDIR_LLVM)
-	$(CC) $(CFLAGS) $(LLVM_CFLAGS) -c -o $@ $<
+	$(CC) $(LFLAGS) $(LLVM_LFLAGS) -c -o $@ $<
 
 $(OBJDIR_C)/%.o: $(srcdir)/%.c
 	mkdir -p $(OBJDIR_C)