I need to include a C header file (libaltq/altq_qop.h) in my C++
program. The C++ compiler (g++) complains and flags a syntax error
because the altq_qop.h file uses "private" as an identifier name in 2
of the structs. I tried enclosing the include statement with extern
"C", as follows but the compiler is still flagged a syntax error.

extern "C" {
#include <libaltq/altq_qop.h>
}

....

Can anyone tell me how to get around this?

Thanks,

Rick

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rickmartija@gmail.com wrote:

> I need to include a C header file (libaltq/altq_qop.h) in my C++
> program. The C++ compiler (g++) complains and flags a syntax error
> because the altq_qop.h file uses "private" as an identifier name in 2
> of the structs. I tried enclosing the include statement with extern
> "C", as follows but the compiler is still flagged a syntax error.
>
> extern "C" {
> #include <libaltq/altq_qop.h>
> }
>

I think the extern "C" {} only tells the compiler
about the linkage to to C-functions (i.e. use
another calling convention). Otherwise C++ was intended
to be C-compatible anyway :-). But there are some
syntax issues they couldn't work around. Like
keywords in your case.

I recently had a similar problem with typenames
and variable names being identical. The only thing
that worked for me was to patch the headers, which
is kind of a pain in the neck 'cause they are
third party.

O.


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rickmartija@gmail.com wrote:
> I need to include a C header file (libaltq/altq_qop.h) in my C++
> program. The C++ compiler (g++) complains and flags a syntax error
> because the altq_qop.h file uses "private" as an identifier name in 2
> of the structs. I tried enclosing the include statement with extern
> "C", as follows but the compiler is still flagged a syntax error.

> extern "C" {
> #include <libaltq/altq_qop.h>
> }

> Can anyone tell me how to get around this?

Not good style, but as a desperate hack:

#define private p_r_i_v_a_t_e
exterm "C" {
# include <libaltq/altq_qop.h>
}
#undef private


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In article <43e74493-21a3-49a0-9a70-56422fe12ed3@f63g2000hsf.googlegroups.com>,
<rickmartija@gmail.com> wrote:
>....h file uses "private" as an identifier name...
>I tried enclosing the include statement with extern
>"C", as follows but the compiler is still flagged a syntax error.
>extern "C" {
>#include <libaltq/altq_qop.h>
>}

Check out http://www.comeaucomputing.com/techtalk/#externc
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Comeau C/C++ ONLINE ==> http://www.comeaucomputing.com/tryitout
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Comeau C/C++ with Dinkumware's Libraries... Have you tried it?

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