meson/docs/markdown/snippets/mixed_language_linker_tests.md

== Link tests can use sources for a different compiler ==

Usually, the links method of the compiler object uses a single program invocation to do both compilation and linking. Starting with this version, whenever the argument to links is a file, Meson will check if the file suffix matches the compiler object's language. If they do not match, as in the following case:

cxx = meson.get_compiler('cpp')
cxx.links(files('test.c'))

then Meson will separate compilation and linking. In the above example test.c will be compiled with a C compiler and the resulting object file will be linked with a C++ compiler. This makes it possible to detect misconfigurations of the compilation environment, for example when the C++ runtime is not compatible with the one expected by the C compiler.

For this reason, passing file arguments with an unrecognized suffix to links will cause a warning.