[LLVMdev] problem compiling the cfrontend on Linux/PPC

[John Criswell]

Cyrille Mescam wrote:
>>Okay, I took a closer look at your output.

Please see below.

[snip]

> Now, it stoppes there:
> 
> gmake[1]: Entering directory
> `/usr/local/home/cyrille/project/llvm/cfrontend/build/powerpc-unknown-linux-gnu/libiberty'
> if [ x"" != x ] && [ ! -d pic ]; then \
>   mkdir pic; \
>   else true; fi
>   touch stamp-picdir
>   CONFIG_FILES= CONFIG_HEADERS=config.h:config.in /bin/sh
>   ./config.status
>   config.status: creating config.h
>   config.status: config.h is unchanged
>   config.status: executing default commands
> 
> --------------------------------
> .... (xgcc compilation with no error), then
> --------------------------------
> 
> /usr/local/home/cyrille/project/llvm/cfrontend/build/gcc/xgcc
> -B/usr/local/home/cyrille/project/llvm/cfrontend/build/gcc/
> -B/usr/local/home/cyrille/project/llvm/cfrontend/install/powerpc-unknown-linux-gnu/bin/
> -B/usr/local/home/cyrille/project/llvm/cfrontend/install/powerpc-unknown-linux-gnu/lib/
> -isystem
> /usr/local/home/cyrille/project/llvm/cfrontend/install/powerpc-unknown-linux-gnu/include
> -isystem
> /usr/local/home/cyrille/project/llvm/cfrontend/install/powerpc-unknown-linux-gnu/sys-include
> -c -DHAVE_CONFIG_H -O2 -O2 -I. -I../../../src/libiberty/../include  -W
> -Wall -Wtraditional -pedantic ../../../src/libiberty/cp-demangle.c -o
> cp-demangle.o
> Call parameter type does not match function signature!
> ubyte* getelementptr ([27 x ubyte]* %.str_247, int 0, int 0)
>  sbyte* %tmp.51 = tail call uint %fwrite( ubyte* getelementptr ([27 x
>  ubyte]* %.str_247, int 0, int 0), uint 26, uint 1, %struct._IO_FILE*
>  %tmp.52 )    ; <uint> [#uses=0]

For some reason, this call to fwrite() is using a first parameter that 
is a ubyte *.  In the function declaration in the file that you sent me, 
fwrite's first parameter is an sbyte *:

declare uint %fwrite(sbyte*,uint,uint,sbyte*)  ;; __builtin_fwrite

Such a mismatch would cause the assertion that you've seen.  The 
assertion is correct; either the fwrite() declaration is wrong or the 
instruction above should cast the ubyte * to an sbyte *.

I'd like to see what llvm-gcc is doing on your system with a smaller 
program.  Can you generate and send to the list the LLVM assembly for 
the program below by doing the following:

/usr/local/home/cyrille/project/llvm/cfrontend/build/gcc/xgcc
-B/usr/local/home/cyrille/project/llvm/cfrontend/build/gcc/ 
-B/usr/local/home/cyrille/project/llvm/cfrontend/install/powerpc-unknown-linux-gnu/bin/
-B/usr/local/home/cyrille/project/llvm/cfrontend/install/powerpc-unknown-linux-gnu/lib/
-isystem
/usr/local/home/cyrille/project/llvm/cfrontend/install/powerpc-unknown-linux-gnu/include
-isystem 
/usr/local/home/cyrille/project/llvm/cfrontend/install/powerpc-unknown-linux-gnu/sys-include
-S -DHAVE_CONFIG_H -O2 -O2 -I. -I../../../src/libiberty/../include  -W
-Wall -Wtraditional -pedantic test.c -o
test.ll

... where test.c is:

#include <stdio.h>

void
function ()
{
	char buffer[4];
	FILE * f;

	fwrite (buffer, 1, 1, f);
}

-- John T.

-- 
John T. Criswell
Research Programmer
University of Illinois at Urbana-Champaign
"It's today!" said Piglet. "My favorite day," said Pooh.