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From: Jolly Roger <jollyroger@pobox.com>
Newsgroups: comp.sys.mac.apps
Subject: Re: I need help with XCode 7.3
Date: 27 Mar 2016 19:06:28 GMT
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On 2016-03-27, Tom Stiller <clusterfux.upmon@gmail.com> wrote:
> I only use XCode to compile the occasional "C" program but after
> updating to OS X 10.11.4 and XCode 7.3 I cannot even compile a
> "hello world" file.
>
> Source:
> #include <stdio.h>
> #
> int	main(int argc, char** argv)
> {
> 	printf("Hello world.\n");
> }
> }
> Result:
> bash-3.2$ which cc
> /Developer/usr/bin/cc
> bash-3.2$ cc hello.c
> couldn't understand kern.osversion `15.4.0'
> hello.c:1:21: error:  unistd.h: No such file or directory
> hello.c: In function 'main':
> hello.c:5: warning: incompatible implicit declaration of built-in
> 	function 'printf'
> bash-3.2$
>
> I don't understand what generates the
> 	couldn't understand kern.osversion `15.4.0'
> message and I don't know how to prevent the error.
>
> Can someone help?

Interesting. I just updated this morning and didn't see your problem
before or after the update:

Before:
-------

[jr on macpro at Desktop]# cc --version

Apple LLVM version 7.0.2 (clang-700.1.81)
Target: x86_64-apple-darwin15.3.0
Thread model: posix

[jr on macpro at Desktop]# cc hello.c -o hello

[jr on macpro at Desktop]# file hello

hello: Mach-O 64-bit executable x86_64

[jr on macpro at Desktop]# ./hello

Hello world.

After:
------

[jr on macpro at Desktop]# cc --version

Apple LLVM version 7.3.0 (clang-703.0.29)
Target: x86_64-apple-darwin15.4.0
Thread model: posix
InstalledDir:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

[jr on macpro at Desktop]# cc hello.c -o hello

[jr on macpro at Desktop]# file hello

hello: Mach-O 64-bit executable x86_64

[jr on macpro at Desktop]# ./hello

Hello world.


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JR