autodep8 test for C/C++ header

[Benjamin Drung <bdrung@debian.org>]

Hi,

while working a whole week on fixing failing C/C++ header compilations
for armhf time_t [1], I noticed a common pattern: The library -dev
packages was missing one or more dependencies on another -dev package.
Over 200 -dev packages are affected.

I propose to add an autodep8 test for C/C++ header files that tries to
compile the header file. This will catch issues like missing
dependencies and other issues.

Here is a draft for the autopkgtest check script that takes a binary
-dev package as parameter:
https://github.com/bdrung/bdrung-scripts/blob/compile-header-check/compile-header-check

What do you think? Should I proceed developing and packaging this check
script and submit support for it in autodep8?

[1] https://salsa.debian.org/vorlon/armhf-time_t/-/merge_requests/103

-- 
Benjamin Drung
Debian & Ubuntu Developer