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Earnie.
Anurag Sharma wrote:
> Hi All,
>
> I have come across a strange behaviour using gcc cross compiler (host:
> linux, target: cygwin). I am using the cygwin header files and lib files
> while making the compiler. (Cygwin uses newlib instaed of libc).
>
> Consider this short code:
>
> int fd = ::open("/tmp/errnotest", O_RDONLY | O_BINARY);
>
> if (fd == -1) {
> std::cerr << "open failed, errno=" << errno << ", strerror=" <<
> strerror(errno) << std::endl;
> std::cerr << "open failed, errno=" << errno << ", strerror=" <<
> strerror(errno) << std::endl;
> }
>
> I have compiled this code using a cross gcc build on host linux using
> target cygwin.
>
> If I build the cross compiler by providing --enable-threads=single option
> in the configure stage, following is the output :
>
> open failed, errno=2, strerror=No such file or directory
> open failed, errno=2, strerror=No such file or directory
>
> This is of course expected.
>
> Hoewever if I build the cross compiler by providing --enable-threads=posix
> option in the configure stage, the output is as follows :
>
> open failed, errno=2, strerror=No such file or directory
> open failed, errno=0, strerror=No error
>
> That is , after the first call to errno, it is reset!!
>
> Has anyone else experiened this before? Can anyone please help find out
> what exactly is going wrong?
>
> Regards,
>
> Anurag
>
>
>
>
>
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