[llvm-dev] lli can't find vsprintf

[don hinton via llvm-dev]

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

On Mon, Feb 27, 2017 at 3:00 PM jmiguel hernandez <jmiguel.hdez at gmail.com>
wrote:

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

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.
​D:\llvm\examples\helloworld>lli -extra-archive="c:\Program Files
(x86)\Microsoft Visual Studio 14.0\VC\lib\libcmt.lib" hello.bc
LLVM ERROR: Program used external function '___stdio_common_vsprintf' which
could not be resolved!

​D:\llvm\examples\helloworld>lli -extra-archive="c:\Program Files
(x86)\Microsoft Visual Studio 14.0\VC\lib\legacy_stdio_definitions.lib"
hello.bc
LLVM ERROR: Program used external function '___stdio_common_vsprintf' which
could not be resolved!



On Mon, Feb 27, 2017 at 3:18 PM, don hinton <hintonda at gmail.com> wrote:

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.


On Mon, Feb 27, 2017 at 12:44 PM jmiguel hernandez <jmiguel.hdez at gmail.com>
wrote:

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 Sat, Feb 25, 2017 at 11:30 AM, don hinton <hintonda at gmail.com> wrote:

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

On Fri, Feb 24, 2017 at 9:02 PM jmiguel hernandez via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

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


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