check_c_source_compiles test always fails

[GoogleCodeExporter]

I have a library that uses a lot of check_c_source_compiles, 
check_function_exists, check_symbol_exists, etc. checks.
These checks are based on try_compile function which just tries to compile an 
executable from a single source file.

When ios toolchain is active compiler is unable to make "ordinary" executables:

> Check dependencies
> target specifies product type 'com.apple.product-type.tool', but there's no 
such product type for the 'iphoneos' platform

Original issue reported on code.google.com by Equidamoid on 17 Nov 2013 at 8:30