Link in docs.
Merge topic 'WriteCompilerDetectionHeader-module' into next

1ae04357 Link in docs.
Add the WriteCompilerDetectionHeader module.

Provide a function to write a portable header to detect compiler
features.  Generate a preprocessor #error for unknown compilers
and compiler versions whose features are not yet recorded.  This
error condition might be relaxed in the future, but for now it
is useful for verification of expectations.
Merge topic 'WriteCompilerDetectionHeader-module' into next

8986c8f2 Add the WriteCompilerDetectionHeader module.