[Bug c++/69266] New: bootstrap failure undefined reference to `std::basic_ios<char, std::char_traits<char> >::

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69266

            Bug ID: 69266
           Summary: bootstrap failure undefined reference to
                    `std::basic_ios<char, std::char_traits<char> >::
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tprince at computer dot org
  Target Milestone: ---

libtool: link:  /cygdrive/c/users/tim/tim/tim/src/gnu/gcc1/cyg64/./gcc/xgcc
-sha
red-libgcc -B/cygdrive/c/users/tim/tim/tim/src/gnu/gcc1/cyg64/./gcc -nostdinc++
-L/cygdrive/c/users/tim/tim/tim/src/gnu/gcc1/cyg64/x86_64-unknown-cygwin/libstdc
++-v3/src
-L/cygdrive/c/users/tim/tim/tim/src/gnu/gcc1/cyg64/x86_64-unknown-cygw
in/libstdc++-v3/src/.libs
-L/cygdrive/c/users/tim/tim/tim/src/gnu/gcc1/cyg64/x86
_64-unknown-cygwin/libstdc++-v3/libsupc++/.libs
-B/usr/local/gcc6.0/x86_64-unkno
wn-cygwin/bin/ -B/usr/local/gcc6.0/x86_64-unknown-cygwin/lib/ -isystem
/usr/loca
l/gcc6.0/x86_64-unknown-cygwin/include -isystem
/usr/local/gcc6.0/x86_64-unknown
-cygwin/sys-include    -shared -nostdlib
/cygdrive/c/users/tim/tim/tim/src/gnu/g
cc1/cyg64/./gcc/crtbeginS.o  .libs/compatibility.o
.libs/compatibility-debug_lis
t.o .libs/compatibility-debug_list-2.o .libs/compatibility-c++0x.o
.libs/compati
bility-atomic-c++0x.o .libs/compatibility-thread-c++0x.o
.libs/compatibility-chr
ono.o .libs/compatibility-condvar.o  -Wl,--whole-archive
../libsupc++/.libs/libs
upc++convenience.a ../src/c++98/.libs/libc++98convenience.a
../src/c++11/.libs/l
ibc++11convenience.a -Wl,--no-whole-archive 
-L/cygdrive/c/users/tim/tim/tim/src
/gnu/gcc1/cyg64/x86_64-unknown-cygwin/libstdc++-v3/libsupc++/.libs
-L/cygdrive/c
/users/tim/tim/tim/src/gnu/gcc1/cyg64/x86_64-unknown-cygwin/libstdc++-v3/src
-L/
cygdrive/c/users/tim/tim/tim/src/gnu/gcc1/cyg64/x86_64-unknown-cygwin/libstdc++-
v3/src/.libs -L/usr/lib/w32api
-L/cygdrive/c/users/tim/tim/tim/src/gnu/gcc1/cyg6
4/./gcc -L/lib/../lib -L/usr/lib/../lib -lgcc_s -lgcc -lcygwin -ladvapi32
-lshel
l32 -luser32 -lkernel32 -lgcc_s -lgcc
/cygdrive/c/users/tim/tim/tim/src/gnu/gcc1
/cyg64/./gcc/crtend.o  -Wl,-O1 -Wl,--gc-sections
-Wl,--version-script=libstdc++-
symbols.ver   -o .libs/cygstdc++-6.dll -Wl,--enable-auto-image-base -Xlinker
--o
ut-implib -Xlinker .libs/libstdc++.dll.a
.libs/compatibility.o: In function `std::basic_istream<char,
std::char_traits<ch
ar> >::ignore(long)':
/cygdrive/c/users/tim/tim/tim/src/gnu/gcc1/cyg64/x86_64-unknown-cygwin/libstdc++
-v3/src/../../../../libstdc++-v3/src/c++98/compatibility.cc:67: undefined
refere
nce to `std::basic_istream<char, std::char_traits<char>
>::sentry::sentry(std::b
asic_istream<char, std::char_traits<char> >&, bool)'