[LLVMdev] -fPIC warning on every compile on Cygwin

Nick Lewycky nicholas at mxc.ca
Sat Feb 28 20:24:04 PST 2009 

Please try this patch. I tried to copy exactly what libtool would do on 
Cygwin by reading the libtool source.

Nick

Aaron Gray wrote:
> On Fri, Feb 27, 2009 at 4:50 PM, Aaron Gray 
> <aaronngray.lists at googlemail.com 
> <mailto:aaronngray.lists at googlemail.com>> wrote:
> 
>     On Fri, Feb 27, 2009 at 4:32 PM, Jay Foad <jay.foad at gmail.com
>     <mailto:jay.foad at gmail.com>> wrote:
> 
>          >> Could you please rig Makefile.rules or something to print
>         out the value
>          >> of $(LLVM_ON_WIN32) ? The only way I can think of this
>         happening is if
>          >> that's erroneously false.
> 
>         This works for me:
> 
>         Index: Makefile.rules
>         ===================================================================
>         --- Makefile.rules      (revision 65633)
>         +++ Makefile.rules      (working copy)
>         @@ -298,6 +298,8 @@
>               # Common symbols not allowed in dylib files
>               CXX.Flags += -fno-common
>               C.Flags   += -fno-common
>         +    else ifeq ($(OS),Cygwin)
>         +      # Nothing. Cygwin defaults to PIC and warns when given -fPIC
>             else
>               # Linux and others; pass -fPIC
>               CXX.Flags += -fPIC
> 
>      
>     Jay, thanks I will try this.
> 
>  
> I had to hand modify the code as it did not seem to want to work as a patch.
>  
> However, it does not deal with the LLVMHello.dll problem. Here's what I 
> am getting :-
>  
> ~~~
> llvm[3]: Linking Debug Loadable Module LLVMHello.dll
> /usr/build/llvm-65633/lib/Transforms/Hello/Debug/Hello.o: In function 
> `_ZN79_GLO
> BAL__N__usr_src_llvm_65633_lib_Transforms_Hello_Hello.cpp_00000000_965F4EBD6Hell
> o213runOnFunctionERN4llvm8FunctionE':
> /usr/src/llvm-65633/lib/Transforms/Hello/Hello.cpp:53: undefined 
> reference to `l
> lvm::EscapeString(std::basic_string<char, std::char_traits<char>, 
> std::allocator
> <char> >&)'
> /usr/src/llvm-65633/lib/Transforms/Hello/Hello.cpp:54: undefined 
> reference to `l
> lvm::cerr'
> /usr/build/llvm-65633/lib/Transforms/Hello/Debug/Hello.o: In function 
> `_ZN79_GLO
> BAL__N__usr_src_llvm_65633_lib_Transforms_Hello_Hello.cpp_00000000_965F4EBD5Hell
> o13runOnFunctionERN4llvm8FunctionE':
> /usr/src/llvm-65633/lib/Transforms/Hello/Hello.cpp:34: undefined 
> reference to `l
> lvm::EscapeString(std::basic_string<char, std::char_traits<char>, 
> std::allocator
> <char> >&)'
> /usr/src/llvm-65633/lib/Transforms/Hello/Hello.cpp:35: undefined 
> reference to `l
> lvm::cerr'
> /usr/build/llvm-65633/lib/Transforms/Hello/Debug/Hello.o: In function 
> `_ZSt17__v
> erify_groupingPKcjRKSs':
> /usr/gcc-4.2.2/lib/gcc/i686-pc-cygwin/4.2.2/../../../../include/c++/4.2.2/bits/l
> ocale_facets.tcc:2569: undefined reference to 
> `llvm::PassInfo::registerPass()'
> /usr/gcc-4.2.2/lib/gcc/i686-pc-cygwin/4.2.2/../../../../include/c++/4.2.2/bits/l
> ocale_facets.tcc:2571: undefined reference to `llvm::Pass::getPassName() 
> const'
> /usr/gcc-4.2.2/lib/gcc/i686-pc-cygwin/4.2.2/../../../../include/c++/4.2.2/bits/l
> ocale_facets.tcc:2571: undefined reference to 
> `llvm::Pass::print(std::basic_ostr
> eam<char, std::char_traits<char> >&, llvm::Module const*) const'
> /usr/gcc-4.2.2/lib/gcc/i686-pc-cygwin/4.2.2/../../../../include/c++/4.2.2/bits/l
> ocale_facets.tcc:2571: undefined reference to 
> `llvm::FunctionPass::assignPassMan
> ager(llvm::PMStack&, llvm::PassManagerType)'
> /usr/gcc-4.2.2/lib/gcc/i686-pc-cygwin/4.2.2/../../../../include/c++/4.2.2/bits/l
> ocale_facets.tcc:2570: undefined reference to 
> `llvm::Pass::dumpPassStructure(uns
> igned int)'
> /usr/gcc-4.2.2/lib/gcc/i686-pc-cygwin/4.2.2/../../../../include/c++/4.2.2/bits/l
> ocale_facets.tcc:2576: undefined reference to 
> `llvm::FunctionPass::runOnModule(l
> lvm::Module&)'
> /usr/build/llvm-65633/lib/Transforms/Hello/Debug/Hello.o: In function 
> `_ZN4llvm1
> 2RegisterPassIN79_GLOBAL__N__usr_src_llvm_65633_lib_Transforms_Hello_Hello.cpp_0
> 0000000_965F4EBD5HelloEEC1EPKcS5_bb':
> /usr/src/llvm-65633/include/llvm/PassSupport.h:172: undefined reference 
> to `llvm
> ::Pass::getPassName() const'
> /usr/src/llvm-65633/include/llvm/PassSupport.h:172: undefined reference 
> to `llvm
> ::Pass::print(std::basic_ostream<char, std::char_traits<char> >&, 
> llvm::Module c
> onst*) const'
> /usr/src/llvm-65633/include/llvm/PassSupport.h:172: undefined reference 
> to `llvm
> ::FunctionPass::assignPassManager(llvm::PMStack&, llvm::PassManagerType)'
> /usr/src/llvm-65633/include/llvm/PassSupport.h:175: undefined reference 
> to `llvm
> ::Pass::dumpPassStructure(unsigned int)'
> /usr/src/llvm-65633/include/llvm/PassSupport.h:175: undefined reference 
> to `llvm
> ::FunctionPass::runOnModule(llvm::Module&)'
> /usr/build/llvm-65633/lib/Transforms/Hello/Debug/Hello.o: In function 
> `_ZSt17__v
> erify_groupingPKcjRKSs':
> /usr/gcc-4.2.2/lib/gcc/i686-pc-cygwin/4.2.2/../../../../include/c++/4.2.2/bits/l
> ocale_facets.tcc:2560: undefined reference to 
> `llvm::Statistic::RegisterStatisti
> c()'
> /usr/gcc-4.2.2/lib/gcc/i686-pc-cygwin/4.2.2/../../../../include/c++/4.2.2/bits/l
> ocale_facets.tcc:2558: undefined reference to `llvm::Value::getNameStr() 
> const'
> /usr/build/llvm-65633/lib/Transforms/Hello/Debug/Hello.o: In function 
> `_ZNSt12_V
> ector_baseISt4pairIPKN4llvm8PassInfoEPNS1_4PassEESaIS7_EEC2ERKS8_':
> /usr/gcc-4.2.2/lib/gcc/i686-pc-cygwin/4.2.2/../../../../include/c++/4.2.2/bits/s
> tl_vector.h:(.text$_ZN4llvm12FunctionPassD2Ev[llvm::FunctionPass::~FunctionPass(
> )]+0x7): undefined reference to `vtable for llvm::FunctionPass'
> /usr/build/llvm-65633/lib/Transforms/Hello/Debug/Hello.o: In function 
> `_ZSt17__v
> erify_groupingPKcjRKSs':
> /usr/gcc-4.2.2/lib/gcc/i686-pc-cygwin/4.2.2/../../../../include/c++/4.2.2/bits/l
> ocale_facets.tcc:2558: undefined reference to `llvm::Pass::~Pass()'
> /usr/build/llvm-65633/lib/Transforms/Hello/Debug/Hello.o: In function 
> `_ZNSt12_V
> ector_baseISt4pairIPKN4llvm8PassInfoEPNS1_4PassEESaIS7_EEC2ERKS8_':
> /usr/gcc-4.2.2/lib/gcc/i686-pc-cygwin/4.2.2/../../../../include/c++/4.2.2/bits/s
> tl_vector.h:(.text$_ZN4llvm4PassC2EPKv[llvm::Pass::Pass(void 
> const*)]+0x7): unde
> fined reference to `vtable for llvm::Pass'
> /usr/build/llvm-65633/lib/Transforms/Hello/Debug/Hello.o: In function 
> `_ZSt17__v
> erify_groupingPKcjRKSs':
> /usr/gcc-4.2.2/lib/gcc/i686-pc-cygwin/4.2.2/../../../../include/c++/4.2.2/bits/l
> ocale_facets.tcc:2558: undefined reference to `vtable for 
> llvm::FunctionPass'
> collect2: ld returned 1 exit status
> make[3]: *** [/usr/build/llvm-65633/Debug/lib/LLVMHello.dll] Error 1
> make[3]: Leaving directory `/usr/build/llvm-65633/lib/Transforms/Hello'
> make[2]: *** [Hello/.makeall] Error 2
> make[2]: Leaving directory `/usr/build/llvm-65633/lib/Transforms'
> make[1]: *** [Transforms/.makeall] Error 2
> make[1]: Leaving directory `/usr/build/llvm-65633/lib'
> make: *** [all] Error 1
>  
> Aaron Gray at AMD2500-PC <mailto:Gray at AMD2500-PC> /usr/build/llvm-65633 $
>  
> Aaron
>  

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