[LLVMdev] Using LLVM components

[汶翰 (Wen-Han)]

Dear all,

I'm a beginner in LLVM field. If any rudeness, I feel sorry to that.

I have checked-out the source and built successfully.
Now I want to use it, so I write a simple code.

// context.cpp
#include "llvm/LLVMContext.h"
int main() {
  llvm::LLVMContext& context = llvm::getGlobalContext();
  return 0;
}

$ clang++ `llvm-config --cxxflags --ldflags --libs` context.cpp

But it yells

/tmp/cc-maq8ar.o: In function `main':
/nfs/m1/99/r99922105/context.cpp:4: undefined reference to
`llvm::getGlobalContext()'
collect2: ld returned 1 exit status
clang: error: linker (via gcc) command failed with exit code 1 (use -v to
see invocation)

Seems like it cannot find the library.
I have tried debugging

$ echo `llvm-config --cxxflags --ldflags --libs`

-I/home/master/99/r99922105/llvm-101011/include
-I/home/master/99/r99922105/llvm-101011/include -D_DEBUG -D_GNU_SOURCE
-D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -g -fno-exceptions -fno-rtti
-fPIC -Woverloaded-virtual -Wcast-qual
-L/nfs/m1/99/r99922105/llvm-101011/Debug+Asserts/lib -lpthread -ldl -lm
-lLLVMMCDisassembler -lLLVMXCoreAsmPrinter -lLLVMXCoreCodeGen
-lLLVMXCoreInfo -lLLVMSystemZAsmPrinter -lLLVMSystemZCodeGen
-lLLVMSystemZInfo -lLLVMSparcAsmPrinter -lLLVMSparcCodeGen -lLLVMSparcInfo
-lLLVMPowerPCAsmPrinter -lLLVMPowerPCCodeGen -lLLVMPowerPCInfo
-lLLVMPTXAsmPrinter -lLLVMPTXCodeGen -lLLVMPTXInfo -lLLVMMipsAsmPrinter
-lLLVMMipsCodeGen -lLLVMMipsInfo -lLLVMMSP430CodeGen -lLLVMMSP430Info
-lLLVMMSP430AsmPrinter -lLLVMMBlazeAsmPrinter -lLLVMMBlazeCodeGen
-lLLVMMBlazeInfo -lLLVMLinker -lLLVMipo -lLLVMInterpreter
-lLLVMInstrumentation -lLLVMJIT -lLLVMExecutionEngine -lLLVMCppBackend
-lLLVMCppBackendInfo -lLLVMCellSPUAsmPrinter -lLLVMCellSPUCodeGen
-lLLVMCellSPUInfo -lLLVMCBackend -lLLVMCBackendInfo -lLLVMBlackfinAsmPrinter
-lLLVMBlackfinCodeGen -lLLVMBlackfinInfo -lLLVMBitWriter
-lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen
-lLLVMX86AsmPrinter -lLLVMX86Info -lLLVMAsmParser -lLLVMARMDisassembler
-lLLVMARMAsmParser -lLLVMARMCodeGen -lLLVMARMAsmPrinter -lLLVMARMInfo
-lLLVMArchive -lLLVMBitReader -lLLVMAlphaAsmPrinter -lLLVMAsmPrinter
-lLLVMMCParser -lLLVMAlphaCodeGen -lLLVMSelectionDAG -lLLVMCodeGen
-lLLVMScalarOpts -lLLVMInstCombine -lLLVMTransformUtils -lLLVMipa
-lLLVMAnalysis -lLLVMTarget -lLLVMMC -lLLVMCore -lLLVMAlphaInfo
-lLLVMSupport -lLLVMSystem

It seems everything is OK.

I have no idea what I should fix now.
Could anyone give me some advices? I appreciate for that.

Thank you.


-- 
Best regards,
Wen-Han (nowar)
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