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<blockquote data-quote="Raz0rEdge" data-source="post: 1841793" data-attributes="member: 110816">A couple of things. You are writing a C program and should be using 'gcc' to compile it. 'g++' is used for C++ development.My version of your Hello World application is:[CODE]#include &lt;stdio.h&gt;int main(void) {&nbsp; &nbsp; printf(&quot;Hello World\n&quot;);&nbsp; &nbsp; return 0;}[/CODE]I compile with[CODE]gcc -o hello hello.c[/CODE]Not providing the '-o' option means you get a.out which can be confusing. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />Now, I did use 'g++' to compile my code and beyond that (correct) warning, it did compile and run.The fact that you are getting the other errors means that you don't have the command line build tools install, ensure you do so with [CODE]xcode-select --install[/CODE]You should then have the C Library necessary to run your program.You should also likely install Xcode which is an awesome IDE for for your development needs. You can write programs in C, C++ and Objective-C for macOS, iOS, WatchOS and so on in there.</blockquote>

[QUOTE="Raz0rEdge, post: 1841793, member: 110816"] A couple of things. You are writing a C program and should be using 'gcc' to compile it. 'g++' is used for C++ development. My version of your Hello World application is: [CODE] #include <stdio.h> int main(void) { printf("Hello World\n"); return 0; } [/CODE] I compile with [CODE] gcc -o hello hello.c [/CODE] Not providing the '-o' option means you get [B]a.out[/B] which can be confusing. :) Now, I did use 'g++' to compile my code and beyond that (correct) warning, it did compile and run. The fact that you are getting the other errors means that you don't have the command line build tools install, ensure you do so with [CODE] xcode-select --install [/CODE] You should then have the C Library necessary to run your program. You should also likely install Xcode which is an awesome IDE for for your development needs. You can write programs in C, C++ and Objective-C for macOS, iOS, WatchOS and so on in there. [/QUOTE]

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