[Bug bootstrap/12019] New: check for working C compiler on newlib targets fails due to missing crt0.o

[dhazeghi at yahoo dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12019

           Summary: check for working C compiler on newlib targets fails due
                    to missing crt0.o
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Keywords: build
          Severity: normal
          Priority: P2
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dhazeghi at yahoo dot com
                CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: d30v, fr30-elf

Using gcc mainline to build for some (most?) newlib targets fails when building libstdc++ due to:

checking for C compiler default output... configure: error: C compiler cannot create executables
See `config.log' for more details.
make: *** [configure-target-libstdc++-v3] Error 1

Looking at config.log, we see:

configure:2352:  /home/dara/mainline/objdir/gcc/xgcc -B/home/dara/mainline/objdir/gcc/ -
nostdinc -B/home/dara/mainline/objdir/d30v/newlib/ -isystem /home/dara/mainline/objdir/
d30v/newlib/targ-include -isystem /home/dara/mainline/combined/newlib/libc/include -B/tmp/
/d30v/bin/ -B/tmp//d30v/lib/ -isystem /tmp//d30v/include -isystem /tmp//d30v/sys-include -
L/home/dara/mainline/objdir/ld -g -Os -Wa,-C -g -Os -Wa,-C  conftest.c  >&5
/home/dara/mainline/objdir/gcc/collect-ld: cannot open crt0.o: No such file or directory

Of course, crt0.o does exist, and has been built. To fix this, all we need to do is add -B$OBJDIR/
$TARGET/libgloss/$TARGET to the above command line, and gcc will find both crt0.o and libsim.a 
(which is also needed).

Not sure which autoconf variables need hacking though...