Am Wed, 06 Oct 2010 16:27:11 +0400 schrieb "Denis Koroskin" <2kor...@gmail.com>:
> On Wed, 06 Oct 2010 16:20:41 +0400, Manuel König <manuel...@gmx.net> > wrote: > > > Hi, > > > > did anyone have success using the llvm-2.7 D-bindings from the > > bindings project http://www.dsource.org/projects/bindings on x86_64 > > linux? I tried so far with ldc, but the compiler chokes about a > > mere 3570 lines of unresolved symbols when linking with ldc, > > compiling works fine. > > > > Short version: > > ============== > > > > I think the question boils down to "How do I create a D library and > > link it into a c++ program on x86_64 linux using ldc (or gdc or > > <any_other_D_compiler>)". > > > > Long version: > > ============= > > Here's a snip of the linker error messages I get from ldc: > > > > // -- file main.d > > import llvm.c.Core; > > > > void main() > > { > > auto context = LLVMGetGlobalContext(); > > } > > // -- > > > > $ ldc -I=/path/to/llvm-2.7 \ > > -L=/usr/local/lib/libLLVM{Core,Support,System}.a main.d > > /usr/local/lib/libLLVMCore.a(Core.o): In function > > `LLVMContextCreate': Core.cpp:(.text+0x57): undefined reference to > > `operator new(unsigned long)' > > /usr/local/lib/libLLVMCore.a(Core.o): In function > > `LLVMModuleCreateWithName': > > Core.cpp:(.text+0x13a): undefined reference to `operator > > new(unsigned long)' > > /usr/local/lib/libLLVMCore.a(Core.o): In function > > `LLVMModuleCreateWithNameInContext': > > Core.cpp:(.text+0x195): undefined reference to `operator > > new(unsigned long)' > > /usr/local/lib/libLLVMCore.a(Core.o): In function > > `LLVMSetDataLayout': Core.cpp:(.text+0x240): undefined reference to > > `std::basic_string<char, std::char_traits<char>, > > std::allocator<char> >::basic_string(char const*, unsigned long, > > std::allocator<char> const&)' Core.cpp:(.text+0x24f): undefined > > reference to `std::basic_string<char, std::char_traits<char>, > > std::allocator<char> > >> ::assign(std::basic_string<char, std::char_traits<char>, > >> std::allocator<char> > const&)' > > Core.cpp:(.text+0x25e): undefined reference to > > `std::basic_string<char, std::char_traits<char>, > > std::allocator<char> > >> ::_Rep::_S_empty_rep_storage' > > Core.cpp:(.text+0x294): undefined reference to > > `std::basic_string<char, std::char_traits<char>, > > std::allocator<char> > >> ::_Rep::_M_destroy(std::allocator<char> const&)' > >> [...] > > > > After scanning over the error messages, I think it's only operator, > > delete and std::* symbols that are missing. I also get the same > > error messages when I try to compile an equivalent C program that > > uses the llvm-c/* headers with gcc, but it works with g++, so I'm > > quite sure the problem is the missing c++ runtime, which is > > nonexistent in ldc. > > > > I think there are only two ways to solve this: > > > > (1) link the c++ runtime to ldc (I have no clue how to do that or if > > it's possible) > > (2) Write a D library using the llvm D-bindings, define a semi-main > > function as extern(C), and write a c++ wrapper program that > > links to the D library and does nothing more than calling the > > semi-main function. The llvm symbols and c++ runtime will then be > > linked in using g++. > > > > Option (2) seems easy, but ldc does not seem to have a linker swith > > to build libraries, and doing > > > > ldc -c myprog.d # produces myprog.o > > ar -cq myprog.a myprog.o > > > > to generate a library from the object file doesn't work because > > there are still undefined symbols to the main function or the > > module ctors in there, even when myprog.d doesn't define a main > > function. I could try to hack those missing functions back in by > > defining them in the C program, but there must be some simpler way > > to generate libraries, or am I at a loosing front here? > > > > I also consider using other compilers than ldc as an option, but > > afaik the only other usable compiler might be gdc (is that stable > > by now?). > > You should probably ask LDC guys (irc://irc.freenode.net/ldc) Thanks, I'll try. But I think the development of LDC was put on hold due to lack of time and interest, let's see if I can find someone there :)
