clang cant compile any proggram in 32bit platforms. Even with a simple test
like this:

#include <stdio.h>

int main()
{
	puts("Halo!!");

	return 0;
}

it says:

annwn:~/tmp/t> clang t1.c
/usr/bin/ld: cannot find crtbegin.o: No such file or directory
/usr/bin/ld: cannot find -lgcc
clang: error: linker command failed with exit code 1 (use -v to see invocation)

And with c++:

#include <iostream>

int main()
{
	std::cout << "Halo!!" << std::endl;

	return 0;
}

annwn:~/tmp/t> clang++ t2.cc
t2.cc:1:10: fatal error: 'iostream' file not found
#include <iostream>
         ^
1 error generated.

It works fine on x86-64. It looks like it is missing all system directories in its path search.
On x86-64:

werewolf:~/tmp/t> clang -print-search-dirs
programs: =/usr/bin:/usr/lib/gcc/x86_64-mageia-linux-gnu/4.8.2/../../../../x86_64-mageia-linux-gnu/bin
libraries: =/usr/bin/../lib/clang/3.3:/usr/lib/gcc/x86_64-mageia-linux-gnu/4.8.2:/usr/lib/gcc/x86_64-mageia-linux-gnu/4.8.2/../../../../lib64:/lib/../lib64:/usr/lib/../lib64:/usr/lib/gcc/x86_64-mageia-linux-gnu/4.8.2/../../..:/lib:/usr/lib

On x86-32:

annwn:~/tmp/t> clang -print-search-dirs
programs: =/usr/bin:/..//bin
libraries: =/usr/bin/../lib/clang/3.3:/lib:/usr/lib


Reproducible: 

Steps to Reproduce: