lli can't find vsprintf

Hi
i am wondering if someone could give me some tips on how to debug/solve this problem. I am trying to use LLI on Windows. I build llvm and clang using cmake.

clang -c hello.c -emit-llvm -o hello.bc

lli hello.bc

D:\llvm\examples\helloworld>lli hello.bc
LLVM ERROR: Program used external function ‘___stdio_common_vsprintf’ which could not be resolved!

But, I can generate the exe though
llc -filetype=obj hello.bc

link hello.obj -defaultlib:libcmt

maybe i need a

D:\llvm\examples\helloworld>clang --version
clang version 5.0.0 (trunk 296084) (llvm/trunk 296083)
Target: i686-pc-windows-msvc
Thread model: posix
InstalledDir: D:\llvm\build\Debug\bin

D:\llvm\examples\helloworld>lli --version
LLVM (http://llvm.org/):
LLVM version 5.0.0svn
DEBUG build with assertions.
Default target: i686-pc-windows-msvc
Host CPU: broadwell

hello.bc (5.01 KB)

hello.c (76 Bytes)

I think you need to tell lli which shared libraries to load, via “-load option,” in order to find missing symbols – probably libcmt in this case, since that’s what you passed to link in the llc example.

hth…
Don

thank you! yes, i guess that is the problem.
unfortunately libcmt doesn’t work. could it have another name for lli?

The function missing seems to be part of libcmt since i get a similar error on linking if i remove the libcmt

D:\llvm\examples\helloworld>lli -load=libcmt hello.bc
Error opening ‘libcmt’: libcmt: Can’t open: The specified module could not be found. (0x7E)
-load request ignored.
LLVM ERROR: Program used external function ‘___stdio_common_vsprintf’ which could not be resolved!

D:\llvm\examples\helloworld>link hello.obj
Microsoft (R) Incremental Linker Version 14.00.24215.1
Copyright (C) Microsoft Corporation. All rights reserved.

hello.obj : error LNK2019: unresolved external symbol ___acrt_iob_func referenced in function _printf
hello.obj : error LNK2019: unresolved external symbol ___stdio_common_vsprintf referenced in function __vsnprintf_l
hello.obj : error LNK2019: unresolved external symbol ___stdio_common_vfprintf referenced in function __vfprintf_l
LINK : error LNK2001: unresolved external symbol _mainCRTStartup
hello.exe : fatal error LNK1120: 4 unresolved externals

On Linux I don’t need to explicitly load the c standard library, but not sure what happens on windows. However, I think you need to pass the complete name, and perhaps the path. On windows I think the name is something like libcmt.lib, but have no idea where it lives.

i think Microsoft deprecated the stdio or something like that.
but i don’t know how to link it for lli :frowning:

D:\llvm\examples\helloworld>lli -load=“c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\lib\libcmt.lib” hello.bc
Error opening ‘c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\lib\libcmt.lib’: c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\lib\libc
mt.lib: Can’t open: Unknown error (0xC1)
-load request ignored.
LLVM ERROR: Program used external function ‘___stdio_common_vsprintf’ which could not be resolved!

0xc1 is
ERROR_BAD_EXE_FORMAT

193 (0xC1)

%1 is not a valid Win32 application.

If you have windows and MSVC++, fire it up and see what it links to.

Or google for “default c and c++ libraries for windows” which should pop up a page explaining what ms recommends – you probably want the multi-threaded dll.

Hth…
Don