[LLVMdev] Compiling llvm-gcc in linux/ppc

[Chris Lattner]

On Tue, 22 May 2007, Nicolas Geoffray wrote:
> OK, seems like there were unused TARGET_MACHO macros that would protect
> these errors from happening. I made some modifications that add #if
> TARGET_MACHO.

ok.  If you send a patch in that adds these, I would be happy to apply it.

> Now the error is a linkage problem:
>
> /home/varth/project/llvm-cvs/llvm-gcc4/obj/gcc/xgcc: symbol lookup
> error: /home/varth/project/llvm-cvs/llvm-gcc4/obj/gcc/libgcc_s.so.1:
> undefined symbol: __thenan_sf
>
> And even if I force the definition of thenan_sf with
> const fp_number_type __thenan_sf = { CLASS_SNAN, 0, 0, {(fractype) 0} };
>
> I still get the error.

Unfortunately, I really don't know.  I assume this is supposed to be 
coming from gcc/config/fp-bit.c, but I don't know how any of this stuff 
works.

-Chris


> Cheers,
> Nicolas
>
> Nicolas Geoffray wrote:
>> Chris Lattner wrote:
>>
>>> This looks like you're compiling llvm-gcc3, which is quite dead by now.
>>> Please follow these instructions:
>>> http://llvm.org/docs/CFEBuildInstrs.html
>>>
>>>
>>>
>> Oups, sorry for that. Here is the error message with the latest svn version:
>>
>> gcc -c   -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes
>> -Wmissing-prototypes -pedantic -Wno-long-long -Wno-variadic-macros
>> -Wold-style-definition    -DHAVE_CONFIG_H -DENABLE_LLVM
>> -D__STDC_LIMIT_MACROS   -I. -I. -I../../trunk/gcc -I../../trunk/gcc/.
>> -I../../trunk/gcc/../include -I../../trunk/gcc/../libcpp/include
>> -I/home/varth/project/llvm-cvs/llvm/include
>> -I/usr/local/home/varth/project/llvm-cvs/llvm/include
>> ../../trunk/gcc/stor-layout.c -o stor-layout.o
>> ../../trunk/gcc/stor-layout.c:450:25: error: macro "ADJUST_FIELD_ALIGN"
>> passed 3 arguments, but takes just 2
>> ../../trunk/gcc/stor-layout.c: In function 'layout_decl':
>> ../../trunk/gcc/stor-layout.c:449: error: 'ADJUST_FIELD_ALIGN'
>> undeclared (first use in this function)
>> ../../trunk/gcc/stor-layout.c:449: error: (Each undeclared identifier is
>> reported only once
>> ../../trunk/gcc/stor-layout.c:449: error: for each function it appears in.)
>> ../../trunk/gcc/stor-layout.c:711:43: error: macro "ADJUST_FIELD_ALIGN"
>> passed 3 arguments, but takes just 2
>> ../../trunk/gcc/stor-layout.c: In function 'update_alignment_for_field':
>> ../../trunk/gcc/stor-layout.c:708: error: 'ADJUST_FIELD_ALIGN'
>> undeclared (first use in this function)
>> ../../trunk/gcc/stor-layout.c:760:41: error: macro "ADJUST_FIELD_ALIGN"
>> passed 3 arguments, but takes just 2
>> ../../trunk/gcc/stor-layout.c:994:44: error: macro "ADJUST_FIELD_ALIGN"
>> passed 3 arguments, but takes just 2
>> ../../trunk/gcc/stor-layout.c: In function 'place_field':
>> ../../trunk/gcc/stor-layout.c:991: error: 'ADJUST_FIELD_ALIGN'
>> undeclared (first use in this function)
>> ../../trunk/gcc/stor-layout.c:1031:44: error: macro "ADJUST_FIELD_ALIGN"
>> passed 3 arguments, but takes just 2
>> make[1]: *** [stor-layout.o] Error 1
>> make[1]: Leaving directory `/home/varth/project/llvm-cvs/llvm-gcc4/obj/gcc'
>> make: *** [all-gcc] Error 2
>>
>>
>> I looked a bit at the source, and the gcc/config/darwin.h declares a
>> ADJUST_FIELD_ALIGN with two arguments whereas all other back-ends that
>> declare ADJUST_FIELD_ALIGN have only two arguments. And it seems that
>> stor-layout.c assumes that if we have ADJUST_FIELD_ALIGN defined, then
>> we're on darwin.
>>
>> Nicolas
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>>
>
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-Chris

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