Which standard is the default for -std?

[John Rocha <jrr@cisco.com>]

Hello All,

I was reading and found the '-std' flag for C++ compilation using the 
[gcc] compiler.

My man page for [gcc] indicates:

   1. gnu89
      is the default value "Default, ISO C90 plus GNU extension
      (including some C(features)".
   2. gnu99
      "ISO C99 plus GNU extension. When IOS C99 is fully implemented in
      GCC this will become the default."

The version of [g++/gcc] I am using is as 4.1.2 20070115 (detailed 
listing shown at end) for Linux on a SUSE 10 SP1 machine.

I went to gnu.org, navigated to the latest documentation for [g++/gcc] 
and found 4.4.3 20100121. The PDF documentation for 4.4.3 describes the 
'-std' options the same way: gnu89 is the current default, gnu99 is the 
planned to be the future default.

Is this still true? Is gnu89 still the default, or is this a case where 
the compiler was updated but the documentation wasn't? [Three years 
seems a long time to implement a standard -- but I'm being a demanding 
customer, eh? :)]

So, is gnu89 still the default for the '-std' flag?

Secondly, is there some flag or option that displays the settings, even 
the default settings that are in use? I know, RTFM and trust in it, but 
I've been burned by outdated documentation a few times. Hence my 
apprehension.

Thanks in advance for your time,

-=John


Detailed listing for my version of g++/gcc.
--------------------------------------------------------------------------------
g++ -v
Using built-in specs.
Target: i586-suse-linux
Configured with: ../configure --enable-threads=posix --prefix=/usr 
--with-local-prefix=/usr/local --infodir=/usr/share/info 
--mandir=/usr/share/man --libdir=/usr/lib --libexecdir=/usr/lib 
--enable-languages=c,c++,objc,fortran,obj-c++,java,ada 
--enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.1.2 
--enable-ssp --disable-libssp --disable-libgcj --with-slibdir=/lib 
--with-system-zlib --enable-shared --enable-__cxa_atexit 
--enable-libstdcxx-allocator=new --program-suffix= 
--enable-version-specific-runtime-libs --without-system-libunwind 
--with-cpu=generic --host=i586-suse-linux
Thread model: posix
gcc version 4.1.2 20070115 (prerelease) (SUSE Linux)
--------------------------------------------------------------------------------

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