Fix broken Linux support

JoelTroch commented 4 years ago

This PR fixes the broken Linux support. A few notes to take for future changes if you want to keep Linux compatibility:

Don't forget to update Makefile.hl_cdll and Makefile.hldll if you update hl_cdll.vcxproj and hl.vcxproj respectively.
Do not use STD math macros (min, max, abs), use Valve's (V_min, V_max, V_abs) instead.
GCC/G++ complained about illegal "non-const lvalue Vector assignement to Vector &", see the debugging wireframe stuff for details.
Never use backslashes in include paths, always forward slashes.

This PR is a draft/W.I.P. because the raw input fix currently used does not work under Linux.

JoelTroch commented 4 years ago

The mouse issue is fixed on Linux and no regressions on Win32.

I recommend Win32 users to set the m_mousethread_sleep CVAR to 1 instead of 1000 (GoldSrc's default) as intended by the PR on Half-Life's repo.

hammermaps commented 4 years ago

Hey, JoelTroch, nice to see you, I am very happy that you are helping here.

Admer456 commented 4 years ago

Sorry for the delay, but thanks for the Linux fixes. :)

Admer456 / halflife-vs2019-sohl12