Hello world reversed?

output

➜  C  cc -o hello hello.c 
➜  C  ls -la
total 40
drwxr-xr-x+   5 mmcdaris  staff   170 Jan 28 23:06 .
drwxr-xr-x+ 108 mmcdaris  staff  3672 Jan 28 14:57 ..
-rw-r--r--+   1 mmcdaris  staff    78 Jan 28 22:38 Makefile
-rwxr-xr-x+   1 mmcdaris  staff  8496 Jan 28 23:06 hello
-rw-r--r--+   1 mmcdaris  staff    60 Jan 28 22:40 hello.c
➜  C  ./hello 
Hello, world.
➜  C  pkg-config 
Must specify package names on the command line
➜  C  cc pkg-config --cflags --libs libxml-2.0
clang: error: unsupported option '--cflags'
clang: error: unsupported option '--libs'
clang: error: no such file or directory: 'pkg-config'
clang: error: no such file or directory: 'libxml-2.0'
clang: error: no input files
➜  C  cc pkg-config --cflags --libs libxml-2.0 -o hello hello.c 
clang: error: unsupported option '--cflags'
clang: error: unsupported option '--libs'
clang: error: no such file or directory: 'pkg-config'
clang: error: no such file or directory: 'libxml-2.0'
➜  C  cc `pkg-config --cflags --libs libxml-2.0` -o hello hello.c 
➜  C  hello                                                       
.dlroW olleH
➜  C  hello
.dlroW olleH
➜  C  vim hello           
➜  C  vim hello.c
➜  C  cc -o hello hello.c  
➜  C  hello 
.dlroW olleH
➜  C  cc `pkg-config --cflags --libs libxml-2.0` -o hello hello.c 
➜  C  
➜  C  hello 
.dlroW olleH
➜  C  hello
.dlroW olleH
➜  C  hello
.dlroW olleH
➜  C  echo hello
hello
➜  C  cat hello.c  
#include <stdio.h>
int main(){ printf("Hello, world.\n"); }
➜  C