[LLVMdev] Using non-system compiler to build llvm and llvm-gcc front end

Scott Ricketts sricketts at maxentric.com
Fri May 1 18:20:07 PDT 2009

Ah, nevermind... just needed to make clean to clear out some of the junk I
compiled with gcc-4.1.2. The build completed without error.

On Fri, May 1, 2009 at 2:14 PM, Scott Ricketts <sricketts at maxentric.com>wrote:

> I am attempting to install llvm on CentOS 5.3, which uses gcc-4.1.2 as its
> system compiler. Since this compiler has reported to behave poorly with
> llvm, I built gcc-4.2.4 in an insulated directory for use with my llvm
> installation.
> However, I am not sure I am configuring properly. The gcc-4.2.4
> installation is in /pkg/bin/gcc-4.2.4. Here is my config line:
> ../llvm-2.5/configure --prefix=/pkg/bin/llvm/ CC=/pkg/bin/gcc-4.2.4/bin/gcc
> CXX=/pkg/bin/gcc-4.2.4/bin/g++ CXXCPP=/pkg/bin/gcc-4.2.4/bin/cpp LDFLAGS=-L
> /pkg/bin/gcc-4.2.4/lib64/  CXXFLAGS=-I/pkg/bin/gcc-4.2.4/include/c++/4.2.4/
> CPPFLAGS=-I/pkg/bin/gcc-4.2.4/include/
> I am trying to specify all the appropriate environment variables for using
> the non-default gcc. However, it is likely that I have made an error or are
> ommitting some important variable(s).
> Then I do "gmake tools-only" (because I have yet to build the llvm-gcc
> front end). Here is the error:
> gmake[1]: Entering directory `/pkg/build/llvm/llvm-obj/lib/VMCore'
> llvm[1]: Building Intrinsics.gen.tmp from Intrinsics.td
> /pkg/build/llvm/llvm-obj/Release/bin/tblgen: /usr/lib64/libstdc++.so.6:
> version `GLIBCXX_3.4.9' not found (required by
> /pkg/build/llvm/llvm-obj/Release/bin/tblgen)
> gmake[1]: ***
> [/pkg/build/llvm/llvm-obj/lib/VMCore/Release/Intrinsics.gen.tmp] Error 1
> gmake[1]: Leaving directory `/pkg/build/llvm/llvm-obj/lib/VMCore'
> gmake: *** [all] Error 1
> So it is looking in /usr/lib64/ for libstdc++.so.6, when in fact I want it
> to look in /pkg//bin/gcc-4.2.4/lib64/ (which I thought I had specified with
> the configuration).
> Any help would be appreciated.
> Thanks,
> Scott
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