gnu: Add maelstrom.

* gnu/packages/games.scm (maelstrom): New variable.
* gnu/packages/patches/maelstrom-use-system-physfs.patch: New file.
* gnu/local.mk (dist_patch_DATA): Reference it here.

Change-Id: Iee41dc552edb639047278392ea57a41112c04fd8
Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>

3 files changed, 106 insertions, 0 deletions

diff --git a/gnu/local.mk b/gnu/local.mk
index 60919446efc..bbf5399649b 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1889,6 +1889,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/lxsession-potfiles-ignore.patch          \
   %D%/packages/patches/mate-common-honor-aclocal.patch          \
   %D%/packages/patches/mactelnet-remove-init.patch              \
+  %D%/packages/patches/maelstrom-use-system-physfs.patch                \
   %D%/packages/patches/mailutils-variable-lookup.patch          \
   %D%/packages/patches/mandoc-support-zstd-compression.patch    \
   %D%/packages/patches/mantid-openmp-cleanup.patch              \
diff --git a/gnu/packages/games.scm b/gnu/packages/games.scm
index 15d3b7732e6..5ebbf0fdf77 100644
--- a/gnu/packages/games.scm
+++ b/gnu/packages/games.scm
@@ -4825,6 +4825,72 @@ match, cannon keep, and grave-itation pit.")
       (license (list license:gpl3+
                      license:cc-by-sa3.0))))) ;/data/audio/music
 
+(define-public maelstrom
+  (package
+    (name "maelstrom")
+    (version "4.0.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+              (url "https://github.com/libsdl-org/Maelstrom")
+              (commit (string-append "release-" version))))
+       (sha256
+        (base32 "1vry9vqb8sijyl10b7cbyxlx1sadykw3zgvg28lz92qk4p406jpy"))
+       (file-name (git-file-name name version))
+       (snippet
+        #~(begin
+            (use-modules (guix build utils))
+            (substitute* '("game/mods.cpp" "utils/files.c")
+              (("\"[^\"]*/physfssdl3.h\"") "\"physfssdl3.h\""))
+            (substitute* "CMakeLists.txt"
+              (("set\\(original_BUILD_SHARED_LIBS.*\n") "")
+              (("set\\(BUILD_SHARED_LIBS OFF\\)\n") "")
+              (("add_subdirectory\\(external/SDL_net.*")
+               (string-append "find_package(SDL3_net REQUIRED)\n"
+                              "include(CheckCSourceCompiles)\n"
+                              "include(CMakeDependentOption)\n"))
+              (((string-append "set\\(BUILD_SHARED_LIBS \"\\$\\{"
+                               "original_BUILD_SHARED_LIBS\\}\"\\)\n")) "")
+              (("add_subdirectory\\(macres\\)\n") "")
+              (("miniz/miniz\\.c\n") "")
+              (("find_package\\(SDL3_net (REQUIRED)\\)\n" all first)
+               (string-append all "pkg_check_modules(MINIZ " first
+                              " IMPORTED_TARGET miniz)\n"))
+              (("(target_link_libraries\\(Maelstrom PRIVATE )SDLmac\\)" all first)
+               (string-append all "\n" first "PkgConfig::MINIZ)")))
+            (for-each delete-file-recursively
+                      (list "macres"
+                            "miniz"
+                            "Xcode"))))
+       (patches (search-patches "maelstrom-use-system-physfs.patch"))))
+    (build-system cmake-build-system)
+    (arguments
+     (list
+      #:configure-flags
+      #~(list "-DSTEAM=OFF"
+              "-DUSE_VENDORED_SDL=OFF"
+              "-DSTANDALONE_INSTALL=OFF")
+      #:tests? #f)) ;no testes
+    (native-inputs (list pkg-config))
+    (inputs (list miniz physfs physfs-sdl3 sdl3 sdl3-net))
+    (home-page "https://github.com/libsdl-org/Maelstrom")
+    (synopsis "Asteroids game")
+    (description
+     "You pilot your ship through the dreaded \"Maelstrom\" asteroid belt
+-- suddenly your best friend thrusts towards you and fires, directly at your
+cockpit.  You raise your shields just in time, and the battle is joined.
+
+Maelstrom is a free software port of the original shareware game for the
+Macintosh by Ambrosia Software, Inc.  It is a fast-action, asteroids-like game,
+with classic pixel graphics and original sounds.
+
+In addition to being a faithful reproduction of the original game, this version
+adds game controller support, mobile touch controls, and both cooperative and
+competitive multiplayer action.")
+    (license (list license:zlib ;game code
+                   license:cc-by3.0)))) ;sprites, sounds, etc.
+
 (define-public alienblaster
   (package
     (name "alienblaster")
diff --git a/gnu/packages/patches/maelstrom-use-system-physfs.patch b/gnu/packages/patches/maelstrom-use-system-physfs.patch
new file mode 100644
index 00000000000..12f02076111
--- /dev/null
+++ b/gnu/packages/patches/maelstrom-use-system-physfs.patch
@@ -0,0 +1,39 @@
+Use system physfs and physfs-sdl3 instead of the vendored copy.
+
+This patch switches Maelstrom from using bundled physfs and physfssdl3
+to using the system packages found via pkg-config.
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+--- a/CMakeLists.txt    2026-05-20 09:21:15.747350351 -0300
++++ b/CMakeLists.txt    2026-05-20 09:25:32.336090395 -0300
+@@ -26,9 +26,9 @@
+     set(SDL_EMSCRIPTEN_PERSISTENT_PATH /storage)
+ endif()
+ 
+-set(PHYSFS_BUILD_SHARED OFF)
+-set(PHYSFS_BUILD_TEST OFF)
+-add_subdirectory(external/physfs EXCLUDE_FROM_ALL)
++find_package(PkgConfig REQUIRED)
++pkg_check_modules(PHYSFS REQUIRED IMPORTED_TARGET physfs)
++pkg_check_modules(PHYSFSSDL3 REQUIRED IMPORTED_TARGET physfs-sdl3)
+ 
+ option(USE_VENDORED_SDL "Use the vendored version of SDL" TRUE)
+ if (USE_VENDORED_SDL)
+@@ -163,8 +163,6 @@
+        utils/rapidxml.h
+        utils/rapidxml.hpp
+ 
+-       external/physfs/extras/physfssdl3.c
+-
+        miniz/miniz.c
+ 
+        Maelstrom.rc
+@@ -224,7 +222,8 @@
+ endif()
+ 
+ target_link_libraries(Maelstrom PRIVATE SDLmac)
+-target_link_libraries(Maelstrom PRIVATE physfs-static)
++target_link_libraries(Maelstrom PRIVATE PkgConfig::PHYSFS)                                                                                                              
++target_link_libraries(Maelstrom PRIVATE PkgConfig::PHYSFSSDL3)
+ target_link_libraries(Maelstrom PRIVATE SDL3_net::SDL3_net)
+ target_link_libraries(Maelstrom PRIVATE SDL3::SDL3)
\ No newline at end of file