Compiling C++ for Android: select command

[CRoberson]

I've downloaded the CodeSourcery stuff (the free stuff if that makes a difference) and tried compiling Ares. There is only one compile error (now) and that is on the select command which works on my other Linux G++ compilers.

Here is the error:
compmov.cpp:170:63: error: 'select' was not declared in this scope.

At the top of compmov.cpp, I have these:
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>

#include <iostream>
#include <time.h>
#include "headers.h"

So, what is different about this compiler than G++ for Linux x86 64 bit that makes it not work?

[stegemma]

I suggest to find in witch of the headers is included "select" in G++ and then search for the correspondent one in android compiler.

Can you post the line of code where "select" is used?

[CRoberson]

I suggest to find in witch of the headers is included "select" in G++ and then search for the correspondent one in android compiler.

Can you post the line of code where "select" is used?

The online GNU manuals claim it is in <sys/types.h>. In their manual, they have a sample program. I cut/pasted it in a file and get the same error.

The example is on this page:

http://www.gnu.org/savannah-checkouts/g ... or-I_002fO

My code is:

select(32, &readfds, (fd_set *) 0,(fd_set *) 0, &timeout);

[Sven]

Just a wild guess, try <sys/select.h> if that exists. Found here.

Sven

[CRoberson]

Just a wild guess, try <sys/select.h> if that exists. Found here.

Sven

#include <sys/select.h>

The compiler says no such file or directory.

[Sven]

Just a wild guess, try <sys/select.h> if that exists. Found here.

Sven

#include <sys/select.h>

The compiler says no such file or directory.

Hmm. Maybe you try something like "man -M <directory of Sourcery G++ man pages> select"?

Or could there be some offending code included in your "headers.h" that confuses the compiler?

Sven

[CRoberson]

Just a wild guess, try <sys/select.h> if that exists. Found here.

Sven

#include <sys/select.h>

The compiler says no such file or directory.

Hmm. Maybe you try something like "man -M <directory of Sourcery G++ man pages> select"?

Or could there be some offending code included in your "headers.h" that confuses the compiler?

Sven

I also tried the example on the page you referenced. It fails the same way.

[Sven]

Just a wild guess, try <sys/select.h> if that exists. Found here.

Sven

#include <sys/select.h>

The compiler says no such file or directory.

Hmm. Maybe you try something like "man -M <directory of Sourcery G++ man pages> select"?

Or could there be some offending code included in your "headers.h" that confuses the compiler?

Sven

I also tried the example on the page you referenced. It fails the same way.

I am not sure whether this thread covers a somewhat related topic. But at least it shows that there are some "standard" things not implemented in that toolchain.

Sven

[wgarvin]

My guess is that "select" is a socket function, and I guess Ares is trying to use it to detect if there is input available to be read.

But the uCLinux platform that compiler is for has been stripped down, and perhaps it does not include that function.

[Edit: the things removed from uCLinux are mostly things that can't be implemented without an MMU. Such as fork(). Sockets could probably be supported, but I don't know if it does.]

[CRoberson]

My guess is that "select" is a socket function, and I guess Ares is trying to use it to detect if there is input available to be read.

But the uCLinux platform that compiler is for has been stripped down, and perhaps it does not include that function.

[Edit: the things removed from uCLinux are mostly things that can't be implemented without an MMU. Such as fork(). Sockets could probably be supported, but I don't know if it does.]

It is testing for input on stdin.

If this can't be accomplished then that explains all the missing functionality in Android based Chess programs compared to the PC Chess programs.