Switching to clang 2.8

Clang Frontend
1

Dear all,
I am working on a project where we use clang internally for parsing and rewriting capabilities.

I decided to give clang 2.8 a try and replaced the old installation with the RC2. I had to make some changes in the code but not big deal, the main problem I cannot solve now is the linking.

When I build llvm I use the flag 'clang-only' to build the part I am interested in.
I built llvm using the following 2 commands:

./configure --prefix=.. --enable-shared --enable-asserts
make REQUIRES_RTTI=1 clang-only && make install clang-only

In order to feed the clang library to my project I have a cmake file where I specify one by one the libraries which has to be linked.
I noticed that libCIndex.a so I updated my cmake file by removing any reference to it. Basically this is the list of libraries (from the cmake file):

find_library(clang_CompilerDriver_LIB NAMES CompilerDriver PATHS ${LLVM_HOME}/lib)
find_library(clang_Basic_LIB NAMES clangBasic PATHS ${LLVM_HOME}/lib)
find_library(clang_Sema_LIB NAMES clangSema PATHS ${LLVM_HOME}/lib)
find_library(clang_CIndex_LIB NAMES CIndex PATHS ${LLVM_HOME}/lib)
find_library(clang_Driver_LIB NAMES clangDriver PATHS ${LLVM_HOME}/lib)
find_library(clang_AST_LIB NAMES clangAST PATHS ${LLVM_HOME}/lib)
find_library(clang_Rewrite_LIB NAMES clangRewrite PATHS ${LLVM_HOME}/lib)
find_library(clang_Analysis_LIB NAMES clangAnalysis PATHS ${LLVM_HOME}/lib)
find_library(clang_Lex_LIB NAMES clangLex PATHS ${LLVM_HOME}/lib)
find_library(clang_Frontend_LIB NAMES clangFrontend PATHS ${LLVM_HOME}/lib)
find_library(clang_Parse_LIB NAMES clangParse PATHS ${LLVM_HOME}/lib)
find_library(clang_Index_LIB NAMES clangIndex PATHS ${LLVM_HOME}/lib)

set(clang_LIBs ${clang_CompilerDriver_LIB} ${clang_CIndex_LIB} ${clang_Sema_LIB} ${clang_Driver_LIB} ${clang_AST_LIB} ${clang_Rewrite_LIB}
                 ${clang_Analysis_LIB} ${clang_Lex_LIB} ${clang_Frontend_LIB} ${clang_Parse_LIB} ${clang_Basic_LIB} ${clang_Index_LIB})

When I try to compile my project with the new clang I get a linking error, it looks like some definitions are missing or perhaps they have been moved in another library:

llvm-2.8/lib/libclangAnalysis.a(AnalysisContext.o): In function `clang::AnalysisContext::getParentMap()':
llvm-2.8-src/tools/clang/lib/Analysis/AnalysisContext.cpp:83: undefined reference to `clang::ParentMap::ParentMap(clang::Stmt*)'
llvm-2.8/lib/libclangAnalysis.a(AnalysisContext.o): In function `~AnalysisContext':
llvm-2.8-src/tools/clang/lib/Analysis/AnalysisContext.cpp:338: undefined reference to `clang::ParentMap::~ParentMap()'
llvm-2.8-src/tools/clang/lib/Analysis/AnalysisContext.cpp:338: undefined reference to `clang::ParentMap::~ParentMap()'
llvm-2.8/lib/libclangFrontend.a(CompilerInstance.o): In function `clang::CompilerInstance::createPCHExternalASTSource(llvm::StringRef, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool, clang::Preprocessor&, clang::ASTContext&, void*)':
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInstance.cpp:270: undefined reference to `clang::ASTReader::ASTReader(clang::Preprocessor&, clang::ASTContext*, char const*, bool)'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInstance.cpp:273: undefined reference to `clang::ASTReader::setDeserializationListener(clang::ASTDeserializationListener*)'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInstance.cpp:274: undefined reference to `clang::ASTReader::ReadAST(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
llvm-2.8/lib/libclangFrontend.a(CompilerInstance.o): In function `CodeCompleteConsumer':
llvm-2.8-src/tools/clang/lib/Frontend/../../include/clang/Sema/CodeCompleteConsumer.h:719: undefined reference to `vtable for clang::CodeCompleteConsumer'
llvm-2.8/lib/libclangFrontend.a(CompilerInstance.o): In function `PrintingCodeCompleteConsumer':
llvm-2.8-src/tools/clang/lib/Frontend/../../include/clang/Sema/CodeCompleteConsumer.h:771: undefined reference to `vtable for clang::PrintingCodeCompleteConsumer'
llvm-2.8/lib/libclangFrontend.a(CompilerInstance.o): In function `CIndexCodeCompleteConsumer':
llvm-2.8-src/tools/clang/lib/Frontend/../../include/clang/Sema/CodeCompleteConsumer.h:797: undefined reference to `vtable for clang::CIndexCodeCompleteConsumer'
llvm-2.8/lib/libclangFrontend.a(CompilerInvocation.o): In function `ParseAnalyzerArgs':
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:762: undefined reference to `clang::driver::ArgList::getLastArg(clang::driver::OptSpecifier) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:772: undefined reference to `clang::driver::Arg::getAsString(clang::driver::ArgList const&) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:777: undefined reference to `clang::driver::ArgList::getLastArg(clang::driver::OptSpecifier) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:787: undefined reference to `clang::driver::Arg::getAsString(clang::driver::ArgList const&) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:792: undefined reference to `clang::driver::ArgList::getLastArg(clang::driver::OptSpecifier) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:802: undefined reference to `clang::driver::Arg::getAsString(clang::driver::ArgList const&) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:815: undefined reference to `clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier, llvm::StringRef) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:821: undefined reference to `clang::driver::ArgList::getLastArgIntValue(clang::driver::OptSpecifier, int, clang::Diagnostic&) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:822: undefined reference to `clang::driver::ArgList::getLastArgIntValue(clang::driver::OptSpecifier, int, clang::Diagnostic&) const'
llvm-2.8/lib/libclangFrontend.a(CompilerInvocation.o): In function `ParseCodeGenArgs':
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:834: undefined reference to `clang::driver::ArgList::getLastArgIntValue(clang::driver::OptSpecifier, int, clang::Diagnostic&) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:837: undefined reference to `clang::driver::ArgList::getLastArg(clang::driver::OptSpecifier) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:837: undefined reference to `clang::driver::Arg::getAsString(clang::driver::ArgList const&) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:849: undefined reference to `clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier, llvm::StringRef) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:862: undefined reference to `clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier, llvm::StringRef) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:863: undefined reference to `clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier, llvm::StringRef) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:865: undefined reference to `clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier, llvm::StringRef) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:867: undefined reference to `clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier, llvm::StringRef) const'
llvm-2.8/lib/libclangFrontend.a(CompilerInvocation.o):/home/motonacciu/software/llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:873: more undefined references to `clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier, llvm::StringRef) const' follow
...

Thanks in advance for the help,
cheers, Simone

2

   Dear all,
I am working on a project where we use clang internally for parsing and
rewriting capabilities.

I decided to give clang 2.8 a try and replaced the old installation with
the RC2. I had to make some changes in the code but not big deal, the
main problem I cannot solve now is the linking.

When I build llvm I use the flag 'clang-only' to build the part I am
interested in.
I built llvm using the following 2 commands:

./configure --prefix=.. --enable-shared --enable-asserts
make REQUIRES_RTTI=1 clang-only&& make install clang-only

In order to feed the clang library to my project I have a cmake file
where I specify one by one the libraries which has to be linked.
I noticed that libCIndex.a so I updated my cmake file by removing any
reference to it. Basically this is the list of libraries (from the cmake
file):

find_library(clang_CompilerDriver_LIB NAMES CompilerDriver PATHS
${LLVM_HOME}/lib)
find_library(clang_Basic_LIB NAMES clangBasic PATHS
${LLVM_HOME}/lib)
find_library(clang_Sema_LIB NAMES clangSema PATHS
${LLVM_HOME}/lib)
find_library(clang_CIndex_LIB NAMES CIndex PATHS
${LLVM_HOME}/lib)
find_library(clang_Driver_LIB NAMES clangDriver PATHS
${LLVM_HOME}/lib)
find_library(clang_AST_LIB NAMES clangAST PATHS
${LLVM_HOME}/lib)
find_library(clang_Rewrite_LIB NAMES clangRewrite PATHS
${LLVM_HOME}/lib)
find_library(clang_Analysis_LIB NAMES clangAnalysis PATHS
${LLVM_HOME}/lib)
find_library(clang_Lex_LIB NAMES clangLex PATHS
${LLVM_HOME}/lib)
find_library(clang_Frontend_LIB NAMES clangFrontend PATHS
${LLVM_HOME}/lib)
find_library(clang_Parse_LIB NAMES clangParse PATHS
${LLVM_HOME}/lib)
find_library(clang_Index_LIB NAMES clangIndex PATHS
${LLVM_HOME}/lib)

set(clang_LIBs ${clang_CompilerDriver_LIB} ${clang_CIndex_LIB}
${clang_Sema_LIB} ${clang_Driver_LIB} ${clang_AST_LIB} ${clang_Rewrite_LIB}
                  ${clang_Analysis_LIB} ${clang_Lex_LIB}
${clang_Frontend_LIB} ${clang_Parse_LIB} ${clang_Basic_LIB}
${clang_Index_LIB})

When I try to compile my project with the new clang I get a linking
error, it looks like some definitions are missing or perhaps they have
been moved in another library:

llvm-2.8/lib/libclangAnalysis.a(AnalysisContext.o): In function
`clang::AnalysisContext::getParentMap()':
llvm-2.8-src/tools/clang/lib/Analysis/AnalysisContext.cpp:83: undefined
reference to `clang::ParentMap::ParentMap(clang::Stmt*)'
llvm-2.8/lib/libclangAnalysis.a(AnalysisContext.o): In function
`~AnalysisContext':
llvm-2.8-src/tools/clang/lib/Analysis/AnalysisContext.cpp:338: undefined
reference to `clang::ParentMap::~ParentMap()'
llvm-2.8-src/tools/clang/lib/Analysis/AnalysisContext.cpp:338: undefined
reference to `clang::ParentMap::~ParentMap()'
llvm-2.8/lib/libclangFrontend.a(CompilerInstance.o): In function
`clang::CompilerInstance::createPCHExternalASTSource(llvm::StringRef,
std::basic_string<char, std::char_traits<char>, std::allocator<char> >
const&, bool, clang::Preprocessor&, clang::ASTContext&, void*)':
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInstance.cpp:270:
undefined reference to
`clang::ASTReader::ASTReader(clang::Preprocessor&, clang::ASTContext*,
char const*, bool)'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInstance.cpp:273:
undefined reference to
`clang::ASTReader::setDeserializationListener(clang::ASTDeserializationListener*)'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInstance.cpp:274:
undefined reference to
`clang::ASTReader::ReadAST(std::basic_string<char,
std::char_traits<char>, std::allocator<char> > const&)'
llvm-2.8/lib/libclangFrontend.a(CompilerInstance.o): In function
`CodeCompleteConsumer':
llvm-2.8-src/tools/clang/lib/Frontend/../../include/clang/Sema/CodeCompleteConsumer.h:719:
undefined reference to `vtable for clang::CodeCompleteConsumer'
llvm-2.8/lib/libclangFrontend.a(CompilerInstance.o): In function
`PrintingCodeCompleteConsumer':
llvm-2.8-src/tools/clang/lib/Frontend/../../include/clang/Sema/CodeCompleteConsumer.h:771:
undefined reference to `vtable for clang::PrintingCodeCompleteConsumer'
llvm-2.8/lib/libclangFrontend.a(CompilerInstance.o): In function
`CIndexCodeCompleteConsumer':
llvm-2.8-src/tools/clang/lib/Frontend/../../include/clang/Sema/CodeCompleteConsumer.h:797:
undefined reference to `vtable for clang::CIndexCodeCompleteConsumer'
llvm-2.8/lib/libclangFrontend.a(CompilerInvocation.o): In function
`ParseAnalyzerArgs':
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:762:
undefined reference to
`clang::driver::ArgList::getLastArg(clang::driver::OptSpecifier) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:772:
undefined reference to
`clang::driver::Arg::getAsString(clang::driver::ArgList const&) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:777:
undefined reference to
`clang::driver::ArgList::getLastArg(clang::driver::OptSpecifier) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:787:
undefined reference to
`clang::driver::Arg::getAsString(clang::driver::ArgList const&) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:792:
undefined reference to
`clang::driver::ArgList::getLastArg(clang::driver::OptSpecifier) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:802:
undefined reference to
`clang::driver::Arg::getAsString(clang::driver::ArgList const&) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:815:
undefined reference to
`clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier,
llvm::StringRef) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:821:
undefined reference to
`clang::driver::ArgList::getLastArgIntValue(clang::driver::OptSpecifier,
int, clang::Diagnostic&) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:822:
undefined reference to
`clang::driver::ArgList::getLastArgIntValue(clang::driver::OptSpecifier,
int, clang::Diagnostic&) const'
llvm-2.8/lib/libclangFrontend.a(CompilerInvocation.o): In function
`ParseCodeGenArgs':
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:834:
undefined reference to
`clang::driver::ArgList::getLastArgIntValue(clang::driver::OptSpecifier,
int, clang::Diagnostic&) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:837:
undefined reference to
`clang::driver::ArgList::getLastArg(clang::driver::OptSpecifier) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:837:
undefined reference to
`clang::driver::Arg::getAsString(clang::driver::ArgList const&) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:849:
undefined reference to
`clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier,
llvm::StringRef) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:862:
undefined reference to
`clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier,
llvm::StringRef) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:863:
undefined reference to
`clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier,
llvm::StringRef) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:865:
undefined reference to
`clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier,
llvm::StringRef) const'
llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:867:
undefined reference to
`clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier,
llvm::StringRef) const'
llvm-2.8/lib/libclangFrontend.a(CompilerInvocation.o):/home/motonacciu/software/llvm-2.8-src/tools/clang/lib/Frontend/CompilerInvocation.cpp:873:
more undefined references to
`clang::driver::ArgList::getLastArgValue(clang::driver::OptSpecifier,
llvm::StringRef) const' follow
...

Actually I solved the problem myself.

The solution was the order in which the libraries are listed. The following order solved the link errors:
set(clang_LIBs ${clang_Clang_LIB}
                            ${clang_Index_LIB}
                            ${clang_Checker_LIB}
                            ${clang_FrontendTool_LIB}
                            ${clang_Frontend_LIB}
                            ${clang_Driver_LIB}
                            ${clang_Basic_LIB}
                            ${clang_Lex_LIB}
                            ${clang_Parse_LIB}
                            ${clang_Sema_LIB}
                            ${clang_AST_LIB}
                            ${clang_Rewrite_LIB}
                            ${clang_Serialization_LIB}
                            ${clang_Analysis_LIB}
                            ${clang_Basic_LIB}

cheers, Simone