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BT_STEAM restored as THE compile gate (license) -- default OFF

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The unification flattened BT_STEAM into the always-on exe; the user flagged
the constraint that makes it the one legitimate compile gate: the Steamworks
SDK license bars a public release with Steam inside, so a release build must
exclude it entirely.

- CMakeLists: option(BT_STEAM OFF) restored around the Steamworks block --
  an OFF configure touches no SDK headers, no steam_api.lib, no DLL copy.
  BT_GLASS stays retired (always defined); ONE build dir either way.
  Dev checkout: build/ configured once with -DBT_STEAM=ON.
- mkdist: reads BT_STEAM from build/CMakeCache.txt.  Steam-OFF zips exclude
  play_steam.bat + steam_api.dll (explicitly filtering a STALE DLL left by
  an earlier ON build), strip the README steam section ({STEAM} line
  markers), and take a -nosteam name suffix so the flavors never clobber
  (found live: both stamped 4.11.436 and the release zip overwrote the dev
  zip).

Verified both flavors:
  ON  (dev build):  steam smoke degrades to Winsock without the client;
      zip carries play_steam.bat + steam_api.dll + README steam lines.
  OFF (scratch build-relcheck, deleted after): 0 compile errors; exe dir =
      btl4.exe + OpenAL32.dll only; boots + simulates; BT_STEAM_NET=1 inert
      (transport not in the binary); end-to-end zip has zero steam bits and
      a clean README.

KB: context/glass-cockpit.md unified-build section records the license gate.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-21 10:40:03 -05:00
co-authored by Claude Opus 4.8
parent dd74d13120
commit d53fcf61ad
4 changed files with 85 additions and 38 deletions
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players/README.txt
+2 -2
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@@ -9,8 +9,8 @@ TO JOIN AN INTERNET GAME: double-click join.bat
(waits for the operator's session if it's not up yet)
TO JOIN A LAN GAME: double-click join_lan.bat (operator's LAN)
SINGLE-PLAYER PRACTICE: double-click play_solo.bat (no network)
STEAM INTERNET PLAY: double-click play_steam.bat (EXPERIMENTAL --
needs the Steam client running; host or join from the menu)
{STEAM}STEAM INTERNET PLAY: double-click play_steam.bat (EXPERIMENTAL --
{STEAM} needs the Steam client running; host or join from the menu)
Your seat and mech are assigned automatically by the operator.
If the game closes unexpectedly, send the operator content\join.log.