Trade ships are now enabled when a ship type with capability trade
exists. No such type exists by default; to enable trade ships,
deities have to customize table ship-chr.
Before, trade ship types were ignored when option TRADESHIPS was
disabled. Except for xdump ship-chr, which happily dumped unusable
trade ship types.
Why upgrade? I'm not a lawyer, but here's my take on the differences
to version 2:
* Software patents: better protection against abuse of patents to
prevent users from exercising the rights under the GPL. I doubt
we'll get hit with a patent suit, but it's a good move just on
general principles.
* License compatibility: compatible with more free licenses, i.e. can
"steal" more free software for use in Empire. I don't expect to steal
much, but it's nice to have the option.
* Definition of "source code": modernization of some details for today's
networked world, to make it easier to distribute the software. Not
really relevant to us now, as we normally distribute full source code.
* Tivoization: this is about putting GPL-licensed software in hardware,
then make the hardware refuse to run modified software. "Neat" trick
to effectively deny its users their rights under the GPL. Abuse was
"pioneered" by TiVo (popular digital video recorders). GPLv3 forbids
it. Unlikely to become a problem for us.
* Internationalization: more careful wording, to harden the license
outside the US. The lawyers tell us it better be done that way.
* License violations: friendlier way to deal with license violations.
This has come out of past experience enforcing the GPL.
* Additional permissions: Probably not relevant to us.
Also include myself in the list of principal authors.
SLOW_WAR has issues:
* The check whether the attacker old-owns the attacked sector is
broken, because att_abort() uses sect.sct_oldown uninitialized.
Spotted by the Clang Static Analyzer.
* Its implementation in setrel() is somewhat scary. It's actually
okay, because that part of setrel() only runs within decl(). Other
callers don't reach it: update_main() because player->god != 0
there, and the rest because they never pass a rel < HOSTILE.
* Documentation is a bit vague.
SLOW_WAR hasn't been used in a public game in years. Fixing it is not
worth it, so remove it instead.
The abstract idea of tying ships and land units to a logistical tether
is sound, the concrete implementation as option FUEL is flawed. It
adds too much busy-work to the game to be enjoyable. It hasn't been
enabled in a public game for years. The code implementing it is ugly,
repetitive, and a burden to maintain.
Remove selector fuel from ship_ca[] and land_ca[], and selectors
fuelc, fuelu from mchr_ca[] and lchr_ca[]. Remove fields fuelc, fuelu
from ship.config and land.config.
Remove command fuel from player_coms[].
Deprecate edit key 'B' in doship(), dounit(), and don't show it in
pr_ship(), pr_land().
Drop opt_FUEL code from build_ship(), shi(), sdump(), ship_damage(),
show_ship_stats(), do_mob_ship(), nav_ship(), build_land(), land(),
ldump(), land_damage(), show_land_stats(), do_mob_land(),
resupply_all(), resupply_commod(), get_minimum(), has_supply(),
unit_list(), vers().
Remove opt_FUEL, fuel_mult, struct shpstr member shp_fuel, struct
mchrstr members m_fuelc and m_fuelu, M_OILER, struct lndstr member
lnd_fuel, struct lchrstr members l_fuelc and l_fuelu, fuel(), and
auto_fuel_ship().
(show): New sub-command.
(player_coms): Update its c_form.
(show_updates, fmttime2822): New.
(vers): Show game_days and game_hours.
(upda): Mark obsolete and point to show updates.
(vers): Point to show rather than update.
Rewrite much of info zdone.
other. Ensure headers in include/ can be included in any order
(except for econfig-spec.h, which is special). New header types.h to
help avoid inclusion cycles. Sort include directives. Remove some
superflous includes.
(show_nuke_capab, vers, xdvisible, build.t, Options.t):
Remove opt_DRNUKE and replace with the following check
drnuke_const > MIN_DRNUKE_CONST.
Set MIN_DRNUKE_CONST to 0.001 to prevent issues with tiny values.
Change the default drnuke_const to 0.0 because in the stock game
opt_DRNUKE was disabled.
Chainsaw version (4.00 since Empire 2, ca. 1995) and Wolfpack version
(used to be the version number after the first dot).
(KSU_DIST, CHAINSAW_DIST, WOLFPACK_DIST): Unused, remove.
(version): New.
(EMP_VERS_MAJOR, EMP_VERS_MINOR, EMP_VERS_PATCH): Remove. Users
changed to use version[] instead. version[] is slightly easier to
initialize from configure.ac.
(check-version): No longer needed, remove.
(legal): New.
(vers, main): Show it.
(ltend, multifire, quite_bigdef, mine, landmine)
(do_loan, prod, printdiff, sell, sona, stre)
(tend, fire_dchrg, vers, work, ac_planedamage)
(ac_shipflak, ask_off, get_mine_dsupport, att_fight)
(ask_move_in_off, detonate, sd, land_gun)
(land_unitgun, lnd_fort_interdiction, lnd_fortify)
(perform_mission, pln_mine, pln_mobcost)
(retreat_ship1, retreat_land1, shp_sweep)
(shp_fort_interdiction, shp_missle_defense)
(new_work, growfood, upd_land, land_repair)
(get_materials, do_mob_ship, do_mob_land)
(load_it, unload_it, prod_plane, produce)
(guerrilla, upd_buildeff, spread_fallout)
(upd_ship, ship_repair, min, dmin, MIN):
Remove min() and dmin() functions and replace
with a MIN macro in misc.h. Remove local MIN
macros and use the new one in misc.h. This
change removes the need for the special
case for _WIN32.
(fuel, look_ship, multifire, mission, sona)
(plane_sona, ef_open, player_accept, player_main)
(ac_dog, att_get_combat, calc_mobcost)
(ask_move_in_off, intelligence_report)
(build_mission_list_type, perform_mission)
(show_mission, use_supply, dodistribute)
(allocate_memory, max, dmax, MAX):
Remove max() and dmax() functions and replace
with a MAX macro in misc.h. Remove local MAX
macros and use the new one in misc.h. This
change removes the need for the special
case for _WIN32.
and Autoconf macros that come with Automake. It supports multiple
separate builds of the same source tree, and updates dependencies
automatically. Targets info, html, install, install-html, uninstall
and dist are not yet implemented.
System configuration is now automatic. Previously, you had to choose
one of several canned system configurations, defined in Make.sysdefs.
Currently, system configuration always uses UCONTEXT for LWP, and
chooses LWP only if its requirements are met.
Feature configuration changed: instead of editing build.conf (further
processed by doconfig), you pass arguments to configure. Note that
build.conf settings that can be overridden in econfig have no
configure equivalent; just edit econfig instead.
Because generated headers complicate makefiles, fold gamesdef.h into
its users: path.c and ipglob.c become path.c.in and ipglob.c.in,
constants.c, vers.c, options.h simply hardcode defaults (most of them
are run-time configurable).
Call the client empire instead of emp_client. This matches what the
old standalone build did.
