The -V option to GCC is deprecated and broken in new versions of GCC. Running g++ -V xxx will NOT cause the program to be compiled/linked with the C++ compiler. According to the bug report (which I don't have a link to at the moment), there are no plans to fix this, and it may be removed at some point. In brief, don't use -V. Don't know about -b, though. Cheers, Lyle -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of llewelly@xxxxxxxxxxxx Sent: Friday, April 02, 2004 9:29 AM To: Ryan Pipkin Cc: gcc-help@xxxxxxxxxxx Subject: Re: 3.3 g++ standard libraries Ryan Pipkin <ryan.pipkin@xxxxxxxx> writes: > llewelly@xxxxxxxxxxxx wrote: > > >Ryan Pipkin <ryan.pipkin@xxxxxxxx> writes: > > > > > >>When I build 3.3.1 or 3.3.3 I seem to be missing standard libraries > >>(-lstdc++ and -lm) in g++. > >> > >>I use g++ -v to determine the libraries being included. > >> > >>3.3.1 & 3.3.3 > >>-lgcc -lgcc_eh -lc -lgcc -lgcc_eh > >> > > > >Are you *sure* you got this from g++ -v and not from gcc -v ? > > I am using gcc 3.3.3 on freebsd5.2-x86, and I get: > > [...] -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc [...] > > from g++ -v, but: > > [...] -lgcc -lgcc_eh -lc -lgcc -lgcc_eh [...] > > from gcc -v. > > > > > >>3.2.1 > >>-lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc > >> > >[snip] > > > >Could you post the *entire* output of 'g++ -v hello.cc' where > > 'hello.cc' is a simple C++ hello world? > > > > > > > It appears to work until I add the -b i686-pc-linux-gnu -V 3.3.3 > options. Ok. I get the same behavior - 'g++' links in -lstdc++ et. al., but 'g++ -V 3.3.3' does not. One note - the behavior appears with *either* the -V or -b options - supplying both is not required. The docs (http://xrl.us/bukk) say those options 'work by running the <machine>-gcc-<version> executable' so gcc is behaving as it is documented to behave, but I think the behavior is surprising, and for anyone using C++, undesireable. I suggest you report a bug/feature request; see gcc.gnu.org/bugs.html . For now, I suggest you run <machine>-g++ directly; there should be a /opt/gnu/x86-3.3.3/bin/i686-pc-linux-gnu-g++ or some such on your machine. Your --program-prefix probably changes it to: /opt/gnu/x86-3.3.3/bin/x86-linux-i686-pc-linux-gnu-g++
