[LLVMdev] problems compiling gcc frontend: Error: bad register name `%rbp'

[robert muth]

Dale:

Yes, there were a number of postings in March. The issue seemed to not
have been fully resolved but
I added "i686-pc-linux-gnu" to the end of my command line
and now the whole thing compiles.

I cannot find a llvm-gcc binary in my install directory, all I have is
 gcc which reports:
../export/bin/gcc -dumpmachine
i686-pc-linux-gnu

It turns out I can generate llvm assembler output using "-S -emit-llvm"
but using just -emit-llvm does not work
./gcc  -emit-llvm  /home/robertm/hello.c
/tmp/cc3X2m5t.o: file not recognized: File format not recognized
collect2: ld returned 1 exit status

Is this expected?

Robert
On Wed, May 28, 2008 at 8:53 PM, Dale Johannesen <dalej at apple.com> wrote:
>
> On May 28, 2008, at 5:22 PM, robert muth wrote:
>
>> I have problem compiling the gcc frontend.
>> Almost everything seems to compile but at the very end
>> when crt startup files are compiled, the assembler complains
>> about bad registers.
>> Any idea what I am doing wrong?
>> Thanks,
>> Robert
>
> It looks like your assembler is being invoked in 32-bit mode.  Other
> people have had that problem, but I don't recall how it was fixed
> (doesn't affect my platform).  Try the mailing list archives around
> 2-3 months back.
>
>> HOST:
>> os: ubuntu 2.6.18 kernel  x86_64 GNU/Linux
>> compiler:            gcc (GCC) 4.0.3 (Ubuntu 4.0.3-1ubuntu5)
>>
>> SOURCE:
>> svn trunk  gcc4.2
>>
>> CONFIGURE:
>> ../llvm-gcc-svn/configure --prefix=/home/robertm/Projects/llvm/
>> --enable-llvm=$PWD/../llvm-objects --disable-shared
>> --enable-languages=c
>>
>> SAMPLE ERROR:
>> /home/robertm/Projects/llvm/llvm-gcc-objects/./gcc/xgcc
>> -B/home/robertm/Projects/llvm/llvm-gcc-objects/./gcc/
>> -B/home/robertm/Projects/llvm/export/x86_64-unknown-linux-gnu/bin/
>> -B/home/robertm/Projects/llvm/export/x86_64-unknown-linux-gnu/lib/
>> -isystem /home/robertm/Projects/llvm/export/x86_64-unknown-linux-gnu/
>> include
>> -isystem /home/robertm/Projects/llvm/export/x86_64-unknown-linux-gnu/
>> sys-include
>> -O2 -O2 -g -O2  -DIN_GCC    -W -Wall -Wwrite-strings
>> -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition
>> -isystem ./include  -I. -I. -I../../llvm-gcc-svn/gcc
>> -I../../llvm-gcc-svn/gcc/. -I../../llvm-gcc-svn/gcc/../include
>> -I../../llvm-gcc-svn/gcc/../libcpp/include
>> -I../../llvm-gcc-svn/gcc/../libdecnumber -I../libdecnumber
>> -I/home/robertm/Projects/llvm/llvm-gcc-objects/../llvm-objects/include
>> -I/home/robertm/Projects/llvm/llvm-svn/include  -g0
>> -finhibit-size-directive -fno-inline-functions -fno-exceptions
>> -fno-zero-initialized-in-bss -fno-toplevel-reorder
>> -fno-omit-frame-pointer -fno-asynchronous-unwind-tables \
>>          -c ../../llvm-gcc-svn/gcc/crtstuff.c -DCRT_BEGIN \
>>          -o crtbegin.o
>> /tmp/ccW2TMKx.s: Assembler messages:
>> /tmp/ccW2TMKx.s:15: Error: bad register name `%rbp'
>> /tmp/ccW2TMKx.s:16: Error: bad register name `%rsp'
>> /tmp/ccW2TMKx.s:22: Error: bad register name `%rax'
>> /tmp/ccW2TMKx.s:23: Error: bad register name `%rax)'
>> /tmp/ccW2TMKx.s:24: Error: bad register name `%rcx'
>> /tmp/ccW2TMKx.s:29: Error: bad register name `%rbp'
>> /tmp/ccW2TMKx.s:32: Error: bad register name `%rax'
>> /tmp/ccW2TMKx.s:33: Error: bad register name `%rax'
>> /tmp/ccW2TMKx.s:34: Error: bad register name `%rcx'
>> /tmp/ccW2TMKx.s:42: Error: bad register name `%rbp'
>> /tmp/ccW2TMKx.s:43: Error: bad register name `%rsp'
>> /tmp/ccW2TMKx.s:44: Error: suffix or operands invalid for `cmp'
>> /tmp/ccW2TMKx.s:47: Error: bad register name `%rax'
>> /tmp/ccW2TMKx.s:50: Error: bad register name `%rax'
>> /tmp/ccW2TMKx.s:53: Error: bad register name `%rdi'
>> /tmp/ccW2TMKx.s:54: Error: bad register name `%rax'
>> /tmp/ccW2TMKx.s:56: Error: bad register name `%rbp'
>> make[3]: *** [crtbegin.o] Error 1
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