In some cases, one wants to use system TClap (for instance, when one has
patched tclap installed)

Fixes: 7c0adf3e
Bug: algorithms-library-toolkit/automata-library#214

Long story short, tclap<=1.2.4 does not work with g++-11 compiler. We
sent a patch into TClap which was merged [1], however, new version was
not yet released so the distros have not included the fix in the
packaged versions of TClap.

This is becoming kind of a blocker for people who want to compile ALT.
I figured out that CMake can download external projects and if you do
things *magically right* [2] you can also convince the external projects
to be built before your project so you can depend on them.
So, CMake should now download TClap if you configure it to build aql2.
As tclap is header-only, compilation of aql2 modules should include the
directory where tclap is downloaded (and prefer it to the /usr/include
system path).
Unfortunately, tclap triggers a lot of warnings for us (hi,
-Wsuggest-override and -Werror) that we haven't seen before because
system headers do not trigger warnings. Fortunately, CMake can configure
includes to be SYSTEM includes (and use -isystem instead -I for g++
builds) which make things working again. However, this is just a really
big hack, AFAIK.

(I, personally, still think we should use some new, C++17-ready argument
parsing library. There is plenty of them.)

[1] https://sourceforge.net/p/tclap/code/ci/52a118c0edb20f64e8da88dc9d0bfee63f2232ac/
[2] https://crascit.com/2015/07/25/cmake-gtest/

Bug: #214
Bug: https://sourceforge.net/p/tclap/bugs/33/

the completion function gets int start and int end representing
boundaries of the completed text. The value is provided offset so there
should not be any need for negative values and I believe we may promote
that by internaly treating the values as unsigneds everywhere.

... because most developers were copy-pasting the preambule anyway and
did not pay any attention to change it.

Also, I think that git does better job in managing that.

Tomáš Pecka authored 4 years ago and Jan Trávníček committed 4 years ago

Although #pragma once is not a standard, compilers nowadays usually
support it. We don't have any tricky build system so we should be OK.

This also fixes many errors regarding using reserved identifiers (names
starting with double underscore).

Simplify versioning by CMake. Uses git version in the format
"<major>.<minor>.<patch>.r<commits-since-version-tag>.g<hash>(-dirty)?".

Remove CMakeLists.txt generator scripts from build phase. Replaced with
CMake's GLOB that can re-run every time the build is invoked. We can
also drop the Python dependency now.

Removed header installs which will be redesigned in future commits.