[LLVMdev] newbie llc build problem: BreakCriticalEdges.cpp:44: undefined reference to `llvm::LoopSimplifyID'

Chris Lattner sabre at nondot.org
Tue Oct 25 10:14:59 PDT 2005 

On Tue, 25 Oct 2005, Kurt Harriman wrote:
> Looking into LLVM for a database query engine project...
>
> After downloading the latest source from CVS, it's my first time trying
> to build LLVM.  Following the "Getting Started" instructions, all went well
> until gmake reported this error while trying to link llc:

> AFAICT, 'LoopSimplifyID' does in fact appear to be present in 
> libLLVMScalarOpts.a, and
> that library does appear to be specified in the linker command line displayed 
> by gmake.
>
> What should I do to solve the link error?

This appears to be a problem exposed by some recent reorg of the libraries 
(to build one version of each library instead of two).  To fix this, I 
moved the loopsimplify pass from the Scalar library to the utils library. 
Please do the following:

1. cd lib/Transforms
2. cvs up -P -d
3. cd Utils; make clean
4. cd Scalar; make clean

Then rebuild.  Hopefully LLC will build now.  If not, please send in the 
error message.  Thanks for reporting the problem!

People who haven't hit this problem shouldn't need to do the steps above: 
normal update and builds should be fine.

-Chris


> ++++++++++++++ Configuration: Red Hat Enterprise Linux 4 - x86 - GCC 3.4.3
>
> $ export LLVM_SRC_ROOT=~/llvm.cvs/llvm
> $ export LLVM_OBJ_ROOT=~/llvm/obj
> $ export LLVM_GCC_DIR=~/llvm/cfrontend/x86/llvm-gcc
> $ export LLVM_LIB_SEARCH_PATH=~/llvm/obj/lib
> $ PATH=${PATH}:${LLVM_GCC_DIR}/bin
> # (using the prebuilt 1.5 llvm-gcc)
> $ cd $LLVM_OBJ_ROOT
>
> $ $LLVM_SRC_ROOT/configure --enable-targets=host-only
>
> ++++++++++++++ gmake stderr...
> $ gmake TOOL_VERBOSE=1 >../make2.log
> Reading specs from /usr/lib/gcc/i386-redhat-linux/3.4.3/specs
> Configured with: ../configure --prefix=/usr --mandir=/usr/share/man 
> --infodir=/usr/share/info --enable-shared --enable-threads=posix 
> --disable-checking --with-system-zlib --enable-__cxa_atexit 
> --disable-libunwind-exceptions --enable-java-awt=gtk --host=i386-redhat-linux
> Thread model: posix
> gcc version 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)
> /usr/libexec/gcc/i386-redhat-linux/3.4.3/collect2 --eh-frame-hdr -m elf_i386 
> -dynamic-linker /lib/ld-linux.so.2 -o /home/kh/llvm/obj/Debug/bin/llc 
> /usr/lib/gcc/i386-redhat-linux/3.4.3/../../../crt1.o 
> /usr/lib/gcc/i386-redhat-linux/3.4.3/../../../crti.o 
> /usr/lib/gcc/i386-redhat-linux/3.4.3/crtbegin.o -L/home/kh/llvm/obj/Debug/lib 
> -L/usr/lib/gcc/i386-redhat-linux/3.4.3 -L/usr/lib/gcc/i386-redhat-linux/3.4.3 
> -L/usr/lib/gcc/i386-redhat-linux/3.4.3/../../.. 
> /home/kh/llvm/obj/tools/llc/Debug/llc.o 
> /home/kh/llvm/obj/Debug/lib/LLVMCBackend.o 
> /home/kh/llvm/obj/Debug/lib/LLVMX86.o 
> /home/kh/llvm/obj/Debug/lib/LLVMSelectionDAG.o 
> /home/kh/llvm/obj/Debug/lib/LLVMCodeGen.o 
> /home/kh/llvm/obj/Debug/lib/LLVMBCReader.o 
> /home/kh/llvm/obj/Debug/lib/LLVMBCWriter.o 
> /home/kh/llvm/obj/Debug/lib/LLVMCore.o 
> /home/kh/llvm/obj/Debug/lib/LLVMbzip2.o --export-dynamic -lLLVMTarget 
> -lLLVMipa -lLLVMTransforms -lLLVMScalarOpts -lLLVMAnalysis 
> -lLLVMTransformUtils -lLLVMSupport -lLLVMSystem -lpthread /usr/lib/libltdl.so 
> -ldl --rpath /home/kh/llvm/obj/Debug/bin -lstdc++ -lm -lgcc_s -lgcc -lc 
> -lgcc_s -lgcc /usr/lib/gcc/i386-redhat-linux/3.4.3/crtend.o 
> /usr/lib/gcc/i386-redhat-linux/3.4.3/../../../crtn.o
> /home/kh/llvm/obj/Debug/lib/libLLVMTransformUtils.a(BreakCriticalEdges.o)(.gnu.linkonce.t._ZNK95_GLOBAL__N__home_kh_llvm.cvs_llvm_lib_Transforms_Utils_BreakCriticalEdges.cpp_DD76033A_46A04D1D18BreakCriticalEdges16getAnalysisUsageERN4llvm13AnalysisUsageE+0x51): 
> In function `(anonymous 
> namespace)::BreakCriticalEdges::getAnalysisUsage(llvm::AnalysisUsage&) 
> const':
> /home/kh/llvm.cvs/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp:44: 
> undefined reference to `llvm::LoopSimplifyID'
> collect2: ld returned 1 exit status
> gmake[2]: *** [/home/kh/llvm/obj/Debug/bin/llc] Error 1
> gmake[1]: *** [llc/.makeall] Error 2
>
>
> ++++++++++++++ gmake stdout tail...
> gmake[2]: Entering directory `/home/kh/llvm/obj/tools/llc'
> llvm[2]: Linking Debug executable llc
> /home/kh/llvm/obj/mklib --tag=CXX --tag=disable-shared --mode=link g++ 
> -I/home/kh/llvm/obj/tools/llc -I/home/kh/llvm.cvs/llvm/tools/llc 
> -I/home/kh/llvm/obj/include -I/home/kh/llvm.cvs/llvm/include 
> -I/home/kh/llvm/obj/include -I/home/kh/llvm.cvs/llvm/include -D_GNU_SOURCE 
> -D__STDC_LIMIT_MACROS -Wall -W -Wwrite-strings -Wno-unused -g -D_DEBUG   -v 
> -rpath /home/kh/llvm/obj/Debug/bin -export-dynamic 
> -L/home/kh/llvm/obj/Debug/lib -L/home/kh/llvm/obj/Debug/lib   -o 
> /home/kh/llvm/obj/Debug/bin/llc /home/kh/llvm/obj/tools/llc/Debug/llc.o 
> /home/kh/llvm/obj/Debug/lib/LLVMCBackend.o 
> /home/kh/llvm/obj/Debug/lib/LLVMX86.o 
> /home/kh/llvm/obj/Debug/lib/LLVMSelectionDAG.o 
> /home/kh/llvm/obj/Debug/lib/LLVMCodeGen.o -lLLVMTarget -lLLVMipa 
> -lLLVMTransforms -lLLVMScalarOpts -lLLVMAnalysis -lLLVMTransformUtils 
> /home/kh/llvm/obj/Debug/lib/LLVMBCReader.o 
> /home/kh/llvm/obj/Debug/lib/LLVMBCWriter.o 
> /home/kh/llvm/obj/Debug/lib/LLVMCore.o -lLLVMSupport 
> /home/kh/llvm/obj/Debug/lib/LLVMbzip2.o -lLLVMSystem \
>             -lpthread -lltdl
> g++ -I/home/kh/llvm/obj/tools/llc -I/home/kh/llvm.cvs/llvm/tools/llc 
> -I/home/kh/llvm/obj/include -I/home/kh/llvm.cvs/llvm/include 
> -I/home/kh/llvm/obj/include -I/home/kh/llvm.cvs/llvm/include -D_GNU_SOURCE 
> -D__STDC_LIMIT_MACROS -Wall -W -Wwrite-strings -Wno-unused -g -D_DEBUG -v -o 
> /home/kh/llvm/obj/Debug/bin/llc /home/kh/llvm/obj/tools/llc/Debug/llc.o 
> /home/kh/llvm/obj/Debug/lib/LLVMCBackend.o 
> /home/kh/llvm/obj/Debug/lib/LLVMX86.o 
> /home/kh/llvm/obj/Debug/lib/LLVMSelectionDAG.o 
> /home/kh/llvm/obj/Debug/lib/LLVMCodeGen.o 
> /home/kh/llvm/obj/Debug/lib/LLVMBCReader.o 
> /home/kh/llvm/obj/Debug/lib/LLVMBCWriter.o 
> /home/kh/llvm/obj/Debug/lib/LLVMCore.o 
> /home/kh/llvm/obj/Debug/lib/LLVMbzip2.o -Wl,--export-dynamic 
> -L/home/kh/llvm/obj/Debug/lib -lLLVMTarget -lLLVMipa -lLLVMTransforms 
> -lLLVMScalarOpts -lLLVMAnalysis -lLLVMTransformUtils -lLLVMSupport 
> -lLLVMSystem -lpthread /usr/lib/libltdl.so -ldl -Wl,--rpath 
> -Wl,/home/kh/llvm/obj/Debug/bin
> gmake[2]: Leaving directory `/home/kh/llvm/obj/tools/llc'
> gmake[1]: Leaving directory `/home/kh/llvm/obj/tools'
>
>
> ++++++++++++++ checking whether the library exists and contains the symbol...
> $ nm --print-armap /home/kh/llvm/obj/Debug/lib/libLLVMScalarOpts.a | grep 
> LoopSimplifyID
> _ZN4llvm14LoopSimplifyIDE in LoopSimplify.o
>         U _ZN4llvm14LoopSimplifyIDE
>         U _ZN4llvm14LoopSimplifyIDE
> 00000024 B _ZN4llvm14LoopSimplifyIDE
>         U _ZN4llvm14LoopSimplifyIDE
>         U _ZN4llvm14LoopSimplifyIDE
>         U _ZN4llvm14LoopSimplifyIDE
>
>
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>

-Chris

-- 
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