Re: [libstdc++] Mis-configure _GLIBCXX_LONG_DOUBLE_COMPAT?

[Andrew Pinski <pinskia at gmail dot com>]

On Thu, Aug 30, 2012 at 5:16 PM, Richard Henderson <rth@redhat.com> wrote:
> I've seen this today both for alpha and s390 cross from x86_64:

And powerpc64.  Steven provided a patch:
http://gcc.gnu.org/ml/gcc-patches/2012-09/msg00018.html .

Thanks,
Andrew Pinski


>
>> libtool: compile:  /home/rth/work/gcc/bld-s390/./gcc/xgcc -shared-libgcc -B/home/rth/work/gcc/bld-s390/./gcc -nostdinc++ -L/home/rth/work/gcc/bld-s390/s390x-linux/libstdc++-v3/src -L/home/rth/work/gcc/bld-s390/s390x-linux/libstdc++-v3/src/.libs -B/home/rth/work/gcc/run-cross/s390x-linux/bin/ -B/home/rth/work/gcc/run-cross/s390x-linux/lib/ -isystem /home/rth/work/gcc/run-cross/s390x-linux/include -isystem /home/rth/work/gcc/run-cross/s390x-linux/sys-include -I/home/rth/work/gcc/git-master/libstdc++-v3/../libgcc -I/home/rth/work/gcc/bld-s390/s390x-linux/libstdc++-v3/include/s390x-linux -I/home/rth/work/gcc/bld-s390/s390x-linux/libstdc++-v3/include -I/home/rth/work/gcc/git-master/libstdc++-v3/libsupc++ -fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi -fdiagnostics-show-location=once -ffunction-sections -fdata-sections -frandom-seed=locale-inst.lo -g -O2 -D_GNU_SOURCE -c ../../../../../git-master/libstdc++-v3/src/c++98/locale-inst.cc  -fPIC -DPIC -o loca!
>  le-inst.o
>
>> ../../../../../git-master/libstdc++-v3/src/c++98/locale-inst.cc:362:8: error: âvoid _ZNKSt9money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE9_M_insertILb1EEES3_S3_RSt8ios_basecRKSs()â aliased to undefined symbol â_ZNKSt17__gnu_cxx_ldbl1289money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE9_M_insertILb1EEES4_S4_RSt8ios_basecRKSsâ
>>         _ZNKSt9money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE9_M_insertILb1EEES3_S3_RSt8ios_basecRKSs);
>>         ^
>> ../../../../../git-master/libstdc++-v3/src/c++98/locale-inst.cc:329:19: note: in definition of macro '_GLIBCXX_LDBL_COMPAT'
>>    extern "C" void ldbl (void) __attribute__ ((alias (#dbl), weak))
>>                    ^
>> ../../../../../git-master/libstdc++-v3/src/c++98/locale-inst.cc:360:8: error: âvoid _ZNKSt9money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE9_M_insertILb0EEES3_S3_RSt8ios_basecRKSs()â aliased to undefined symbol â_ZNKSt17__gnu_cxx_ldbl1289money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE9_M_insertILb0EEES4_S4_RSt8ios_basecRKSsâ
>>         _ZNKSt9money_putIcSt19ostreambuf_iteratorIcSt11char_traitsIcEEE9_M_insertILb0EEES3_S3_RSt8ios_basecRKSs);
>>         ^
>> ../../../../../git-master/libstdc++-v3/src/c++98/locale-inst.cc:329:19: note: in definition of macro '_GLIBCXX_LDBL_COMPAT'
>>    extern "C" void ldbl (void) __attribute__ ((alias (#dbl), weak))
>>                    ^
>
> where, given that I've configured --with-long-double-128, appears to have
> mis-identified the correct setting of _GLIBCXX_LONG_DOUBLE_COMPAT.
>
> Is anyone else seeing this?  Is this a problem for cross-compile only?
> Certainly editing config.h after the fact lets the build complete...
>
>
> r~