构建smplayer到LLVM IR并由lli运行

Question

在ubuntu-14.10_amd64中,我通过clang/llvm-3.4编译smplayer-14.9.0.6690.我在src中更改了Makefile,如:

CC=clang 
CXX=clang
CFLAGS = -emit-llvm ...
CXXFLAGS = -emit-llvm ...
LINK = llvm-link
TARGET = smplayer.bc

...

最后我得到了smplayer.bc.然后我用了

$ llvm-dis smplayer.bc -o smplayer.ll 
$ lli -load=... -load=......  smplayer.ll 

但它有一个错误:

LLVM ERROR: Program used external function '__dso_handle' which could not be resolved!

然后我使用clang将bc构建为本机可执行文件,如下所示:

$ clang smplayer.bc -v -o smplayer.na -m64 -L/usr/lib/x86_64-linux-gnu -lz -lQtDBus -lQtScript -lQtXml -lQtGui -lQtNetwork -lQtCore -lpthread

错误是:

/usr/bin/ld: /tmp/smplayer-7c5fc5.o: undefined reference to symbol '__cxa_pure_virtual@@CXXABI_1.3'
/usr/lib/x86_64-linux-gnu/libstdc++.so.6: error adding symbols: DSO missing from command line

Answer 1

尝试使用'-fno-use-cxa-atexit'和clang.这应该摆脱'__dso_handle'的使用.

http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-January/058748.html

它是有益的.