[vidarh]

Many countries allow reverse engineering, and you could infer a "right to decompile" from that in some cases, but as far as I know none of them place any requirement on the source to make it easy.

At most they legally protect someone who decides to run a disassembler or decompiler on a binary from prosecution or lawsuits (but only in as much as you don't use the result to violate copyright or other restrictions).