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Upgrading libstdc++ questions

Title: Upgrading libstdc++ questions

I am trying to upgrade libstdc++ on my gcc installation. The version of gcc I am using is 2.95.3. The version of libstdc++ I am trying to upgrade to is 2.90.8 (the latest version that is supposed to work on 2.95.3).

Directions say that I need to rebuild libgcc.a along with the new libstdc++ for things such as namespaces to work correctly (e.g. to use the stl "std" namespace).

However, my current gcc installation already has namespaces correctly working (I am able to use the STL "std" namespace, etc.). So my question is if I just try to build libstdc++ without rebuilding gcc (libgcc.a)  (by using the --disable-libgcc-rebuild option) will namespaces still work correctly? If not, why not?

I ask this, because customers who use our libraries do not want to have to rebuild their gcc compiler as well (we simply provide the new libstdc++ library files to link with).

I am assuming that I must rebuild libgcc.a because when I try to use the updated library (not having rebuilt libgcc.a) I get a bunch of undefined reference to errors that look like the following (is this true??):

0): undefined reference to `__length_error(char const *)'
obj/Solaris_GNU/Release/fabricacc/sallite/saldcmd.o: In function `basic_string<char, char_traits<char>, allocator<char> >::_M_che

ck(unsigned int) const':
obj/Solaris_GNU/Release/fabricacc/sallite/saldcmd.o(.basic_string<char, char_traits<char>, allocator<char> >::gnu.linkonce.t._M_c

heck(unsigned int) const+0x30): undefined reference to `__out_of_range(char const *)'
obj/Solaris_GNU/Release/fabricacc/sallite/saldfwconf.o: In function `unNibble(char)':
obj/Solaris_GNU/Release/fabricacc/sallite/saldfwconf.o(.text+0x2f0): undefined reference to `LogManager::trace(basic_string<char,

 char_traits<char>, allocator<char> > const &, char const *, basic_string<char, char_traits<char>, allocator<char> > const &, cha

r const *, basic_string<char, char_traits<char>, allocator<char> > const &, int)'
obj/Solaris_GNU/Release/fabricacc/sallite/saldfwconf.o(.text+0x554): undefined reference to `LogManager::trace(basic_string<char,


All help much appreciated,

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