Hi
On Thu, 10 Jul 1997, Oliver Elphick wrote:
> Date: Thu, 10 Jul 1997 16:49:31 +0100
> From: Oliver Elphick <olly@lfix.co.uk>
> To: debian-user@lists.DEBIAN.org
> Subject: g++ / ld / publib linking problem
> Resent-Date: Thu, 10 Jul 1997 16:47:47 +0000
> Resent-From: debian-user@lists.DEBIAN.org
> Resent-cc: recipient list not shown: ;
>
> No-one has attempted an answer to this yet; if you have any ideas,
hmm...
this is first time i saw this
> please let me know!
>
> ------- Repeated Message
>
> Date: Fri, 04 Jul 1997 22:21:39 +0100
> From: "Oliver Elphick" <olly@lfix.co.uk>
> To: debian-user@lists.debian.org
> Subject: Problem linking with publib library and g++
>
> I have a linking problem when I try to include functions from the
> publib library in a C++ program. This worked before I upgraded
> to the new releases (see below).
>
> An easy example:
> #include <publib.h>
> main()
> {
> char *x = "This is a string with spaces ";
> char y[256];
>
> strcpy(y, x);
> strtrim(y);
> strmtrim(y);
> printf ("%s-\n%s-\n", x, y);
> }
>
> When I try to compile this as C++:
> linda:~/cprogs$ g++ main.c -lpub
> /tmp/cca132571.o: In function `main':
> /tmp/cca132571.o(.text+0x2b): undefined reference to `strtrim(char *)'
> /tmp/cca132571.o(.text+0x3a): undefined reference to `strmtrim(char *)'
>
> but as C, it's fine:
> linda:~/cprogs$ gcc main.c -lpub
> linda:~/cprogs$
>
> I can't work out what has changed and why this no longer works.
>
> System: Pentium Pro
> Kernel: 2.0.30
> Debian: 1.3 from unstable
> gcc: 2.7.2.2-4
> binutils: 2.8.1-1
> publib-dev: 0.26-1
> libc6: 2.0.3-4
>
> ------- End of Repeated Message
obviously, C++ name mangling in all it's glory...
>
> Even if I include the library directly on the command line, it doesn't
> work:
>
> linda:~/cprogs$ g++ main.c /usr/lib/libpub.a
> /tmp/cca122331.o: In function `main':
> /tmp/cca122331.o(.text+0x2b): undefined reference to `strtrim(char *)'
> /tmp/cca122331.o(.text+0x3a): undefined reference to `strmtrim(char *)'
>
> but again, gcc finds it:
>
> linda:~/cprogs$ gcc main.c /usr/lib/libpub.a
> linda:~/cprogs$
>
> so it must be something different about the ways that gcc and g++ expect
> to find things in libraries???
yep...
gcc look for strtrim, while g++ looks for
something like strtrim$pc4
> Since the original message, I have tried loading the source of publib
> and recompiling it; this made no difference (there was no reason why
> it should, but I'm clutching at straws now...)
put
#ifdef __cplusplus
extern "C" {
#endif
#include <publib.h>
#ifdef __cplusplus
}
#endif
in your main.cc instead of #include <publib.h>
cheers
OK
--
TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to
[EMAIL PROTECTED] .
Trouble? e-mail to [EMAIL PROTECTED] .
