[cfe-dev] clang assembler problems

kalyan ponnala ponnala.kalyan at gmail.com
Wed Feb 10 21:27:07 PST 2010

I tried this by installing MinGW. When I execute a small program like

int main()
printf("\n hello world");
return 0;

It gives the output as given in this snapshot. It still connects to mingw
but the assembler cant figure out these statements i guess. It is giving
errors as shown in the snapshot. Do you know why is it doing this?


On Wed, Feb 10, 2010 at 6:54 PM, Eli Friedman <eli.friedman at gmail.com>wrote:

> On Wed, Feb 10, 2010 at 3:39 PM, kalyan ponnala
> <ponnala.kalyan at gmail.com> wrote:
> > Hi,
> >
> > I am trying to build clang/llvm using cmake and visual studio on a
> windows
> > vista platform. When I try to build a .c file from command prompt it says
> > it's actually searching for gcc
> > to find the assembler and since i dont have gcc it's failing to assemble
> the
> > code and generating an error message.
> >
> > "gcc" -v -c -o C:/Users/Kalyan/AppData/Local/Temp/cc-000001.o -x
> assembler
> > c:/Users/Kalyan/AppData/Local/Temp/cc-000000.s
> > clang:error: unable to execute command: program not executable
> > clang:error: assembler command failed due to signal 1 (use -v to see
> > invocation)
> >
> > could you tell me why is the clang searching for gcc assembler. and how
> can
> > i change it to point to a write assembler? what assembler does it use by
> the
> > way?
> Because the clang driver doesn't know how to deal with the toolchain
> on Windows, it is actually looking for gcc, which is used as a
> fallback when clang doesn't know the correct commands to assemble and
> link files.  Note that because clang only knows how to output GNU
> assembler syntax on Windows, you'll need the GNU assembler (which is
> available in MinGW, among other places).
> -Eli

Kalyan Ponnala
phone: 8163772059
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