Cannot compile C code after installing xcode

When I installed Xcode on Snow Leopard, gcc was not in my path. I manually added /Developer/bin to get gcc. However, I wrote a simple C program to include stdlib.h and stdio.h and print a string, but I get linker errors.

I think this is because I don't have my include path configured. Can anyone tell me why this was not done automatically and how I can get my C compiler set up?

I think there was a bug in Xcode 4.1 where the command line tools were not installed. I just ran the 4.1.1 delta installer from the App Store and things work just fine.

Last login: Tue Sep 20 14:47:44 on ttys001
mac:~ mike$ which gcc
/usr/bin/gcc
mac:~ mike$ ls -l /usr/bin/gcc
lrwxr-xr-x  1 root  wheel  12 Sep 19 16:04 /usr/bin/gcc -> llvm-gcc-4.2
mac:~ mike$ echo $PATH
/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin
mac:~ mike$ mkdir /tmp/test
mac:~ mike$ cat > /tmp/test/hello.c << EOF
/* Hello World program */

#include<stdio.h>

main()
{
    printf("Hello World");

}
EOF
mac:~ mike$ cd /tmp/test
mac:test mike$ gcc hello.c -o hello
mac:test mike$ ./hello 
Hello Worldmac:test mike$

This should work out of the box with the latest Xcode. Have you made sure you are using the latest gcc / Xcode and not having previous path or binaries installed?

Without knowing the build errors, you either are missing a tool or have header issues. In the case of the latter, here is how llvm-gcc issues in geos were overcome: http://trac.osgeo.org/geos/ticket/463.

Cannot compile C code after installing xcode

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