[Bug other/42813] New: --enable-build-with-cxx libstdc++-v3 is incomplete

["amylaar at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

On i686-pc-linux-gnu, seven libstdc++-v3 symbols are missing when configuring
with --enable-build-with-cxx.
For x86_64-unknown-linux-gnu, it's 53 vs. 46 missing symbols, i.e. again
seven more missing symbols for --enable-build-with-cxx.

Take for example:
__gnu_parallel::_Settings::get()

In the ordinary compilation, this symbol is defined in parallel_settings.o;
that object file is missing for --enable-build-with-cxx.

compilation of parallel_settings.cc depends on ENABLE_PARALLEL, set
by configure.

Inspection of the src/Makefile files shows that ENABLE_PARALLEL was not
set for --enable-build-with-cxx .
The building of parallel_list.o also depends on ENABLE_PARALLEL;
parallel_list and parallel_settings together account for the seven missing
symbols.

The normal bootstrap log file shows:
line 11064/21065:
checking for parallel mode support... yes

The --enable-build-with-cxx bootstrap log file shows:
line 4234/23482:
configure:
/user/inria/fsf/bld-gcc-cxx12/i686-pc-linux-gnu/libstdc++-v3/../libgo
mp/omp.h not found
checking for parallel mode support... no

line 8212/23482:
configure:
/user/inria/fsf/bld-gcc-cxx12/i686-pc-linux-gnu/libstdc++-v3/../libgo
mp/omp.h not found
checking for parallel mode support... no

line 12192/23482:
configure:
/user/inria/fsf/bld-gcc-cxx12/i686-pc-linux-gnu/libstdc++-v3/../libgomp/omp.h
not found
checking for parallel mode support... no


The normal bootstrap log shows:
line 9732/21065:
Configuring in i686-pc-linux-gnu/libgomp

The --enable-build-with-cxx bootstrap log file shows:
line 12983/23482:
Configuring in i686-pc-linux-gnu/libgomp

I.e. the problem is that libgomp is not built before the final
libstdc++-v3 is configured.


-- 
           Summary: --enable-build-with-cxx libstdc++-v3 is incomplete
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: amylaar at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42813