Word processors don't textually copy parts of the word processor into
documents you save with it.
GCC *does* textually copy parts of itself (libgcc, libstdc++ headers,
<stddef.h>...) into programs built with it (some of these technically get
copied by the linker, but it's GCC that induces the linker into doing that
Microsoft *do* claim rights over programs you build with their C compiler,
again because of the language runtime (mostly? they may have other
patent-related reasoning which I'm not really interested in since it
doesn't apply to anything remotely free).
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