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After having installed libpng into my computer, I've included it into my project using #include <png.h> on a Windows 7 SP1 plateform and using Visual Studio Ultimate 2013.
But at build time, I'm getting this error:
C1083: Cannot open include file: 'unistd.h': No such file or directory
How do I please to fix this? I haven't found yet any solution in the net?
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If you write #include <unistd. h>, you must put that file in "include" folder of visual studio (Installation directory). If you are doing write, please refer the following links for more information on error.
In the C and C++ programming languages, unistd. h is the name of the header file that provides access to the POSIX operating system API. It is defined by the POSIX. 1 standard, the base of the Single Unix Specification, and should therefore be available in any POSIX-compliant operating system and compiler.
Solution: Delete /usr/local/include/unistd. h . That way the real header at /usr/include/unistd. h can be found and used again.
No, unistd. h and fcntl. h , etc are not part of standard C.
The "uni" in unistd stands for "UNIX" - you won't find it on a Windows system.
Most widely used, portable libraries should offer alternative builds or detect the platform and only try to use headers/functions that will be provided, so it's worth checking documentation to see if you've missed some build step - e.g. perhaps running "make" instead of loading a ".sln" Visual C++ solution file.
If you need to fix it yourself, remove the include and see which functions are actually needed, then try to find a Windows equivalent.
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If you're using ZLib in your project, then you need to find :
#if 1 in zconf.h and replace(uncomment) it with :
#if HAVE_UNISTD_H /* ...the rest of the line If it isn't ZLib I guess you should find some alternative way to do this. GL.
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