check-source-modules
^^^^^^^^^^^^^^^^^^^^

* The :module:`CheckSourceCompiles` module has been added to
  generalize :module:`CheckCSourceCompiles` and
  :module:`CheckCXXSourceCompiles` to more languages.

* The :module:`CheckSourceRuns` module has been added to
  generalize :module:`CheckCSourceRuns` and
  :module:`CheckCXXSourceRuns` to more languages.

* The :module:`CheckCompilerFlag` module has been added to
  generalize :module:`CheckCCompilerFlag` and
  :module:`CheckCXXCompilerFlag` to more languages.