devkitPro

You are right.

It was a problem of the extraction.

I used 7-zip which fails in extracting the files.

I solved the problem using Winzip.

This seems incredible. It is the first time I encounter this kind of problem.

I updated the libpng to the version released on 30th of July and now the ppc-gcc compiler gives this error:

C:/devkitPro/portlibs/ppc/include/png.h: error: "libpng15" does not name a type

This should be casued by the content of png.h file that is only one line:

libpng15/png.h

I succeded in ...

The libpng include files of PPC, PSP and ARM (png.h, pngconf.h, pnglibconf.h) seem not correct.

The files contain:

libpng15/png***.h

instead of

#include <libpng15/png***.h>

I have the same problem.
The structure "timeval" is defined both in libogc (network.h)

struct timeval {
s32 tv_sec; /* seconds */
s32 tv_usec; /* and microseconds */
};

and in devkitpcc/newlib (sys/time.h)

#ifndef _WINSOCK_H
#define _TIMEVAL_DEFINED
struct timeval {
time_t tv_sec;
suseconds_t ...