Re: [gentoo-alt] rap experiments

[Francois Bissey]

> On 20/01/2017, at 20:57, Benda Xu <heroxbd@g.o> wrote:
>
> Hi,
>
> Francois Bissey <francois.bissey@×××××××××××××.nz> writes:
>
>> Very much like the bootstrapping described in LFS and in line with
>> the way IBM does things for its “advanced toolchain” for power7/8.
>> I actually have an alternate toolchain provided by IBM the last one
>> for SLES11 provides glibc-2.17+gcc-4.8.5+. gcc is patched to find ld64.so.1
>> in the right place _and_ a rpath is added at the spec level also.
>> Anyway gcc/config/rs6000 is a bit more complicated than the i386 one
>> and for some reasons bits are missed by the sed line:
>> grep "_DYNAMIC_LINKER." gcc/config/rs6000/linux64.h
>> #define GLIBC_DYNAMIC_LINKER32 "/shared/work_no_backup/ppc64-prefix/lib/ld.so.1"
>> #define GLIBC_DYNAMIC_LINKER64 "%{mabi=elfv1:/lib64/ld64.so.1;:/lib64/ld64.so.2}”   <==
>> #define GLIBC_DYNAMIC_LINKER64 "%{mabi=elfv2:/lib64/ld64.so.2;:/lib64/ld64.so.1}”   <==
>> #define UCLIBC_DYNAMIC_LINKER32 "/shared/work_no_backup/ppc64-prefix/lib/ld-uClibc.so.0"
>> #define UCLIBC_DYNAMIC_LINKER64 "/shared/work_no_backup/ppc64-prefix/lib/ld64-uClibc.so.0"
>> #define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}"
>> #define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:" U ";:" G "}"
>> #define GNU_USER_DYNAMIC_LINKER32 \
>>  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32)
>> #define GNU_USER_DYNAMIC_LINKER64 \
>>  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64)
>>  -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}}"
>>  -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}}”
>> That explains a lot.
>
> Yeah, the present sed phrase
> "s,(_DYNAMIC_LINKER.*\")(/lib),\1${EPREFIX}\2," does not capture
>
>  #define GLIBC_DYNAMIC_LINKER64 "%{mabi=elfv1:/lib64/ld64.so.1;:/lib64/ld64.so.2}”
>
> We should write it
>
>  "/_DYNAMIC_LINKER/s,([\":])(/lib),\1${EPREFIX}\2,g"
>
> instead probably.
>


I am in favour of adding another phrase, I think the one you are suggesting

would only do 

#define GLIBC_DYNAMIC_LINKER64 "%{mabi=elfv1:${EPREFIX}/lib64/ld64.so.1;:/lib64/ld64.so.2}”

and leave the second instance on the same line alone. Ideally the second phrase

would produce something like

#define GLIBC_DYNAMIC_LINKER64 "${EPREFIX}%{mabi=elfv1:/lib64/ld64.so.1;:/lib64/ld64.so.2}”

'%{mabi=elfv' only appears in that file so that’s a good candidate.

 

François