[LLVMdev] Problems building llvm on AIX

[Krzysztof Parzyszek]

The linker on AIX uses -e to indicate the executable's entry point.  
Remove "-export-dynamic" from your linking options.

-K


On 8/30/2012 9:44 AM, Marcel Bink wrote:
>
> Hi,
>
> Has anyone succeeded in building llvm on AIX?
>
> Currently I am investigating several tools for code analyses and I 
> came upon Clang. We at CCV run our core business applications on 
> RS6000/AIX. At our department we develop those applications.
>
> The reviews on clang look very promising. I was able to build and run 
> it on Linux (SuSE 12.1) without any problems. I tested it with 
> valgrind sources and was impressed by the issues it found.
>
> Building it on AIX is a total disaster however. I had to add some code 
> (added dladdr() function), change Makefiles etc. but that wasn't to 
> much of an issue.
>
> I first tried to build it using cmake
>
> That stopped at the point of not being able to find *mach-o/dyld.h*. 
> After fixing that, lots of 'undeclared' (symbols), 'unknown type name' 
> and 'dereferencing pointer to incomplete type' errors came up.
>
> After that, I made a new build directory and followed the 'Getting 
> Started with LLVM' instructions. That is, using configure.
>
> Running make returned the following errors:
>
> *llvm-3.1/llvm/lib/Support/DynamicLibrary.cpp: In static member 
> function 'static llvm::sys::DynamicLibrary 
> llvm::sys::DynamicLibrary::getPermanentLibrary(const char*, 
> std::string*)':*
>
> *llvm-3.1/llvm/lib/Support/DynamicLibrary.cpp:77:56: error: 'dlopen' 
> was not declared in this scope*
>
> *llvm-3.1/llvm/lib/Support/DynamicLibrary.cpp:79:35: error: 'dlerror' 
> was not declared in this scope*
>
> *llvm-3.1/llvm/lib/Support/DynamicLibrary.cpp:96:19: error: 'dlclose' 
> was not declared in this scope*
>
> *llvm-3.1/llvm/lib/Support/DynamicLibrary.cpp: In member function 
> 'void* llvm::sys::DynamicLibrary::getAddressOfSymbol(const char*)':*
>
> *llvm-3.1/llvm/lib/Support/DynamicLibrary.cpp:104:32: error: 'dlsym' 
> was not declared in this scope*
>
> *llvm-3.1/llvm/lib/Support/DynamicLibrary.cpp: In static member 
> function 'static void* 
> llvm::sys::DynamicLibrary::SearchForAddressOfSymbol(const char*)':*
>
> *llvm-3.1/llvm/lib/Support/DynamicLibrary.cpp:145:39: error: 'dlsym' 
> was not declared in this scope*
>
> *llvm-3.1/llvm/lib/Support/DynamicLibrary.cpp: In member function 
> 'void* llvm::sys::DynamicLibrary::getAddressOfSymbol(const char*)':*
>
> *llvm-3.1/llvm/lib/Support/DynamicLibrary.cpp:105:1: warning: control 
> reaches end of non-void function [-Wreturn-type]*
>
> I don't remember how I fixed that. *dlfcn.h*was already included in 
> *DynamicLibrary.cpp*. Anyway, somehow I managed.
>
> Now building llvm stops at the point of linking *fpcmp*. It compiles 
> *fpcmp.cpp*alright, but make comes with the following messages:
>
> *llvm[2]: Compiling fpcmp.cpp for Release build*
>
> *llvm[2]: Linking Release executable fpcmp (without symbols)*
>
> *ld: 0706-027 The -R $ORIGIN/../lib flag is ignored.*
>
> *ld: 0706-027 The -R 
> /ccvunix/cdndev/user/cdndadm/Tools/llvm-3.0/build/Release/bin flag is 
> ignored.*
>
> *ld: 0711-327 WARNING: Entry point not found: xport-dynamic*
>
> *ld: 0711-244 ERROR: No csects or exported symbols have been saved.*
>
> *collect2: error: ld returned 8 exit status*
>
> *make[2]: *** 
> [/ccvunix/cdndev/user/cdndadm/Tools/llvm-3.0/build/Release/bin/fpcmp] 
> Error 1*
>
> *make[2]: Leaving directory 
> `/ccvunix/cdndev/user/cdndadm/Tools/llvm-3.0/build/utils/fpcmp'*
>
> *make[1]: *** [fpcmp/.makeall] Error 2*
>
> *make[1]: Leaving directory 
> `/ccvunix/cdndev/user/cdndadm/Tools/llvm-3.0/build/utils'*
>
> *make: *** [all] Error 1*
>
> I've searched the internet and tried al suggestions that were given 
> for this error message. None of them, however, in combination with 
> llvm. Nothing worked. I really would like to use clang, but I am 
> desperate on how to continue. I tried cross compiling it on the linux 
> machine, but that wasn't a straight forward action either. At least 
> not for me. I started with llvm version 3.1 and tried 3.0. Alas, no luck.
>
> I tried gcc version 4.2.0-3, version 4.6.2 and version 4.7.1
>
> I'm working on a RS6000, AIX 6.1
>
> Does anyone have any ideas on how to solve this?
>
> Thanks
>
> Marcel
>
>
>
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