'1120 snap: libstdc++-v3 build failure on rs6000-ibm-aix4.2.0.0

[RDBrown at mira dot net]

Build failure for 20001120 snapshot on rs6000-ibm-aix4.2.0.0 compiling
libstdc++-v3/src/complex_io.cc . `atomic_l' referenced in the aix specific
bits/atomicity.h is not declared elsewhere in gcc or in system headers.

/devel/tmp/gcc-20001120.obj/gcc/g++ \
 -B/devel/tmp/gcc-20001120.obj/gcc/ -nostdinc++ \
 -L/devel/tmp/gcc-20001120.obj/rs6000-ibm-aix4.2.0.0/libstd++-v3/src \
 -L/devel/tmp/gcc-20001120.obj/rs6000-ibm-aix4.2.0.0/libstd++-v3/src/.lib \
 s -B/usr/local/rs6000-ibm-aix4.2.0.0/bin/ \
 -B/usr/local/rs6000-ibm-aix4.2.0.0/lib/ -isystem \
 /usr/local/rs6000-ibm-aix4.2.0.0/include -D_GNU_SOURCE -D_ISOC99_SOURCE \
 -nostdinc++ -I../../../../gcc-20001120/libstdc++-v3/include/std \
 -I../../../../gcc-20001120/libstdc++-v3/include/c \
 -I../../../../gcc-20001120/libstdc++-v3/libsupc++ \
 -I../../../../gcc-20001120/libstdc++-v3/include \
 -I../libio -I../../../../gcc-20001120/libstdc++-v3/libio \
 -I../../../../gcc-20001120/libstdc++-v3/libmath -I../include \
 -g -O2 -fno-implicit-templates -Wall -Wno-format -W \
 -Wwrite-strings -Winline -fdiagnostics-show-location=once -g -c \
 ../../../../gcc-20001120/libstdc++-v3/src/complex_io.cc -DPIC \
 -o .libs/complex_io.o
../include/bits/atomicity.h:44: `atomic_l' was not declared in this scope
../include/bits/atomicity.h:44: parse error before ',' token
In file included from ../../../../gcc-20001120/libstdc++-v3/include/bits/basic_string.h:37,
                 from ../../../../gcc-20001120/libstdc++-v3/include/bits/std_string.h:42,
                 from ../../../../gcc-20001120/libstdc++-v3/include/bits/localefwd.h:38,
                 from ../../../../gcc-20001120/libstdc++-v3/include/bits/std_ios.h:41,
                 from ../../../../gcc-20001120/libstdc++-v3/include/bits/std_istream.h:36,
                 from ../../../../gcc-20001120/libstdc++-v3/src/complex_io.cc:30:
../include/bits/atomicity.h:46: `__p' undeclared (first use this function)
../include/bits/atomicity.h:46: (Each undeclared identifier is reported only 
   once for each function it appears in.)
../include/bits/atomicity.h:46: `__oldval' undeclared (first use this function)
../include/bits/atomicity.h:46: `__newval' undeclared (first use this function)
../include/bits/atomicity.h:46: `compare_and_swaplp' undeclared (first use this 
   function)
In file included from ../../../../gcc-20001120/libstdc++-v3/include/bits/basic_string.h:37,
                 from ../../../../gcc-20001120/libstdc++-v3/include/bits/std_string.h:42,
                 from ../../../../gcc-20001120/libstdc++-v3/include/bits/localefwd.h:38,
                 from ../../../../gcc-20001120/libstdc++-v3/include/bits/std_ios.h:41,
                 from ../../../../gcc-20001120/libstdc++-v3/include/bits/std_istream.h:36,
                 from ../../../../gcc-20001120/libstdc++-v3/src/complex_io.cc:30:
../include/bits/atomicity.h:51: parse error before ',' token
../include/bits/atomicity.h:63: parse error before ',' token
make[4]: *** [complex_io.lo] Error 1
make[4]: Leaving directory `/devel/tmp/gcc-20001120.obj/rs6000-ibm-aix4.2.0.0/libstdc++-v3/src'
make[3]: *** [all-recursive] Error 1