On Monday 12 November 2001 10:45, Ivan Martinez wrote:
> Including rtl_posixio.h in the very first line causes:
>
> In file included from
> /usr/src/rtlinux-3.1/linux/include/linux/wait.h:14, from
> /usr/src/rtlinux-3.1/linux/include/linux/fs.h:12, from
> /usr/src/rtlinux-3.1/include/rtl_posixio.h:13, from rtmodule.cpp:1:
> /usr/src/rtlinux-3.1/linux/include/linux/list.h:35: parse error before
> `new' /usr/src/rtlinux-3.1/linux/include/linux/list.h: In function
> `void __list_add (...)':
> /usr/src/rtlinux-3.1/linux/include/linux/list.h:39: `next' undeclared
> (first use this function)
> /usr/src/rtlinux-3.1/linux/include/linux/list.h:39: (Each undeclared
> identifier is reported only once
Ok; those headers aren't written for C++, so you have to tell the
compiler explicitly to treat them like C code;
extern "C" {
#include <various C headers>
}
That goes for all kernel headers actually. C++ compilers usually generate
different symbol names for the same code and various other linkage
differences, so you'll get either unresolved symbols or nasty bugs if you
don't tell the compiler what to do.
//David Olofson --- Programmer, Reologica Instruments AB
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