some GCC questions

some GCC questions

[Jonathan Wilson]

1.does GCC supprt Structured Exception Handling in any way?
2.does GCC supprt Thread Local Storage in any way?
and 3.how does GCC handle constructors/destructors? I know its got 
something to do with the .ctors segment (for constructors) but how does the 
linker match the segments up so that all the constructors get called?

I am interested in adding support to the windows version of GCC for these 
things (i.e. SEH and TLS) but would need to make sure that the hooks in GCC 
are there.

Using C functions in C++

[albert]

Hi!
  I'm trying to use the sphinx2 library within a C++ program and I can't
get it work. I took an example program that comes with the library and I
can make it compile using: 'gcc main.c -lm -lsphinx2 -lsphinx2ad
-lsphinx2fe' but If I put the 2 main functions the program has in a
class, the compiler doesn't give any errors but the linker says:

/tmp/ccrCoGun.o(.text+0x55): In function `KK::utterance_loop()':
: undefined reference to `ad_read(ad_rec_t*, short*, int)'
/tmp/ccrCoGun.o(.text+0x60): In function `KK::utterance_loop()':
: undefined reference to `cont_ad_init(ad_rec_t*, int (*)(ad_rec_t*,
short*, int))'
/tmp/ccrCoGun.o(.text+0x86): In function `KK::utterance_loop()':
: undefined reference to `_E__pr_header(char const*, long, char const*)'
................

so it is only a linking problem and of course I'm using the '-l' flags.
So, my question is... could there be something that didn't let me use this
functions within a class? I've tried using the :: prefix before the
cont_ad_init function but didn't make any effect. Any other suggestions?

PS: I could send you the files if it was useful.

Re: Using C functions in C++

[Florian Weimer]

<albert@wickywicky.net> writes:

> /tmp/ccrCoGun.o(.text+0x55): In function `KK::utterance_loop()':
> : undefined reference to `ad_read(ad_rec_t*, short*, int)'

Make sure that the functions are declared 'extern "C"'.