Reconfigure interop with LLVM

Use more strict linking.
Also remove unused components.

backend.native/llvm.def

@@ -1,4 +1,4 @@
-headers = llvm-c/Core.h llvm-c/ExecutionEngine.h llvm-c/Target.h llvm-c/Analysis.h llvm-c/BitWriter.h \
+headers = llvm-c/Core.h llvm-c/Target.h llvm-c/Analysis.h llvm-c/BitWriter.h \
     llvm-c/BitReader.h llvm-c/Linker.h DebugInfoC.h
 
 headerFilter = llvm-c/* DebugInfoC.h
@@ -15,7 +15,12 @@ linkerOpts = -fPIC -fvisibility-inlines-hidden \
     -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers \
     -pedantic -Wno-long-long -Wcovered-switch-default -Wnon-virtual-dtor -Wdelete-non-virtual-dtor \
     -std=c++11 \
-    -DNDEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+    -DNDEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS \
+    -ldebugInfo -lLLVMTarget -lLLVMMC -lLLVMLinker -lLLVMTransformUtils -lLLVMBitWriter \
+    -lLLVMBitReader -lLLVMAnalysis -lLLVMProfileData -lLLVMCore -lLLVMSupport
+
+# ./llvm-config --libs analysis bitreader bitwriter core linker target
+
 
 linkerOpts.osx = \
     -Wl,-search_paths_first -Wl,-headerpad_max_install_names \
@@ -25,4 +30,8 @@ linkerOpts.linux=\
      -Wl,-z,noexecstack \
      -lrt -ldl -lpthread -lz -lm
 
+excludedFunctions = LLVMInitializeAllAsmParsers LLVMInitializeAllAsmPrinters LLVMInitializeAllDisassemblers \
+    LLVMInitializeAllTargetInfos LLVMInitializeAllTargetMCs LLVMInitializeAllTargets LLVMInitializeNativeTarget \
+    LLVMInitializeNativeAsmParser LLVMInitializeNativeAsmPrinter LLVMInitializeNativeDisassembler
+
 strictEnums = LLVMIntPredicate LLVMOpcode LLVMDLLStorageClass LLVMCallConv LLVMThreadLocalMode LLVMAtomicOrdering