🚀 go-pugleaf

I am having difficuly compiling the libg++-2.7.0 on an IBM RS-6000.
When building builtinbuf.cc, I get the following messages:

        gcc -c -g -O2 -fno-implicit-templates  -I. -I. -nostdinc++ builtinbuf.cc
/isgr/usr/local/lib/g++-include/streambuf.h: In method `int filebuf::is_open() const':
In file included from builtinbuf.h:32,
                 from builtinbuf.cc:29:
/isgr/usr/local/lib/g++-include/streambuf.h:428: member `_fileno' is from private base class
/isgr/usr/local/lib/g++-include/streambuf.h: In method `int filebuf::fd() const':
/isgr/usr/local/lib/g++-include/streambuf.h:429: member `_fileno' is from private base class
builtinbuf.cc: In method `int builtinbuf::overflow(int = -1)':
builtinbuf.cc:32: member `_jumps' is from private base class
builtinbuf.cc:32: `ch' undeclared (first use this function)
builtinbuf.cc:32: (Each undeclared identifier is reported only once
builtinbuf.cc:32: for each function it appears in.)
builtinbuf.cc: In method `int builtinbuf::underflow()':
builtinbuf.cc:34: member `_jumps' is from private base class
builtinbuf.cc: In method `int builtinbuf::xsgetn(char *, int)':
builtinbuf.cc:37: member `_jumps' is from private base class
builtinbuf.cc:37: `buf' undeclared (first use this function)
builtinbuf.cc:37: `n' undeclared (first use this function)
builtinbuf.cc: In method `int builtinbuf::xsputn(const char *, int)':
builtinbuf.cc:40: member `_jumps' is from private base class
builtinbuf.cc:40: `buf' undeclared (first use this function)
builtinbuf.cc:40: `n' undeclared (first use this function)
builtinbuf.cc: In method `int builtinbuf::doallocate()':
builtinbuf.cc:42: member `_jumps' is from private base class
builtinbuf.cc: In method `builtinbuf::~builtinbuf()':
builtinbuf.cc:44: member `_jumps' is from private base class
builtinbuf.cc: In method `int builtinbuf::sync()':
builtinbuf.cc:46: member `_jumps' is from private base class
builtinbuf.cc: In method `struct streambuf * builtinbuf::setbuf(char *, int)':
builtinbuf.cc:49: member `_jumps' is from private base class
builtinbuf.cc:49: `buf' undeclared (first use this function)
builtinbuf.cc:49: `n' undeclared (first use this function)
builtinbuf.cc: In method `long int builtinbuf::seekoff(long int, enum ios::seek_dir, int = 3)':
builtinbuf.cc:53: member `_jumps' is from private base class
builtinbuf.cc:53: `off' undeclared (first use this function)
builtinbuf.cc:53: `dir' undeclared (first use this function)
builtinbuf.cc:53: `mode' undeclared (first use this function)
builtinbuf.cc: In method `long int builtinbuf::seekpos(long int, int = 3)':
builtinbuf.cc:58: member `_jumps' is from private base class
builtinbuf.cc:58: `pos' undeclared (first use this function)
builtinbuf.cc:58: `mode' undeclared (first use this function)
builtinbuf.cc: In method `int builtinbuf::pbackfail(int)':
builtinbuf.cc:62: member `_jumps' is from private base class
builtinbuf.cc:62: `c' undeclared (first use this function)
builtinbuf.cc: In method `int builtinbuf::sys_read(char *, int)':
builtinbuf.cc:65: member `_jumps' is from private base class
builtinbuf.cc:65: `buf' undeclared (first use this function)
builtinbuf.cc:65: `size' undeclared (first use this function)
builtinbuf.cc: In method `long int builtinbuf::sys_seek(long int, enum ios::seek_dir)':
builtinbuf.cc:68: member `_jumps' is from private base class
builtinbuf.cc:68: `off' undeclared (first use this function)
builtinbuf.cc:68: `dir' undeclared (first use this function)
builtinbuf.cc: In method `int builtinbuf::sys_write(const char *, int)':
builtinbuf.cc:71: member `_jumps' is from private base class
builtinbuf.cc:71: `buf' undeclared (first use this function)
builtinbuf.cc:71: `size' undeclared (first use this function)
builtinbuf.cc: In method `int builtinbuf::sys_stat(void *)':
builtinbuf.cc:74: member `_jumps' is from private base class
builtinbuf.cc:74: `buf' undeclared (first use this function)
builtinbuf.cc: In method `int builtinbuf::sys_close()':
builtinbuf.cc:77: member `_jumps' is from private base class
make: 1254-004 The error code from the last command is 1.
 
Make Quitting.
make: 1254-004 The error code from the last command is 2.
 
Make Quitting.