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Bundle SDL3 for Homebrew's sdl2-compat

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Homebrew's sdl2 is now sdl2-compat, which dlopen()s SDL3 at startup
instead of linking it, so fixup_bundle never copied SDL3 into kge.app
and kge aborted at launch with "Failed loading SDL3 library". When the
bundled libSDL2 is sdl2-compat, copy SDL3 to
Contents/Frameworks/libSDL3.dylib, the first place it looks.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
This commit is contained in:
kyle
2026-09-24 12:26:53 -07:00
co-authored by Claude Opus 5.5
parent f4032dcf25
commit fe4e2abb3a
1 changed files with 28 additions and 0 deletions
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cmake/fix_bundle.cmake
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@@ -44,6 +44,34 @@ execute_process(COMMAND chmod -R u+w "${APP_DIR}/Contents/Frameworks")
fixup_bundle("${APP_DIR}" "" "${DIRS}") fixup_bundle("${APP_DIR}" "" "${DIRS}")
# Homebrew's sdl2 is sdl2-compat, which dlopen()s SDL3 at startup instead of
# linking it, so fixup_bundle never sees it. Without SDL3 in the bundle kge
# stops at launch with "Failed loading SDL3 library". sdl2-compat looks for
# @loader_path/libSDL3.dylib first; put SDL3 there.
set(SDL2_IN_BUNDLE "${APP_DIR}/Contents/Frameworks/libSDL2-2.0.0.dylib")
if (EXISTS "${SDL2_IN_BUNDLE}")
file(STRINGS "${SDL2_IN_BUNDLE}" SDL2_COMPAT_REFS REGEX "libSDL3\\.dylib")
if (SDL2_COMPAT_REFS)
find_file(SDL3_DYLIB NAMES libSDL3.0.dylib libSDL3.dylib
PATHS "/opt/homebrew/opt/sdl3/lib" "/opt/homebrew/lib" "/usr/local/opt/sdl3/lib" "/usr/local/lib"
NO_DEFAULT_PATH)
if (NOT SDL3_DYLIB)
message(FATAL_ERROR "libSDL2 in the bundle is sdl2-compat, which needs SDL3 at run time, "
"but libSDL3 was not found (brew install sdl3)")
endif ()
file(REAL_PATH "${SDL3_DYLIB}" SDL3_REAL)
set(SDL3_IN_BUNDLE "${APP_DIR}/Contents/Frameworks/libSDL3.dylib")
message(STATUS "Bundling SDL3 for sdl2-compat: ${SDL3_REAL}")
file(COPY_FILE "${SDL3_REAL}" "${SDL3_IN_BUNDLE}")
execute_process(COMMAND chmod u+w "${SDL3_IN_BUNDLE}")
execute_process(COMMAND /usr/bin/install_name_tool -id "@loader_path/libSDL3.dylib" "${SDL3_IN_BUNDLE}"
RESULT_VARIABLE SDL3_ID_RESULT)
if (NOT SDL3_ID_RESULT EQUAL 0)
message(FATAL_ERROR "install_name_tool -id failed on ${SDL3_IN_BUNDLE}")
endif ()
endif ()
endif ()
# On Apple Silicon (and modern macOS in general), modifications by fixup_bundle # On Apple Silicon (and modern macOS in general), modifications by fixup_bundle
# invalidate code signatures. We must re-sign the bundle (at least ad-hoc) # invalidate code signatures. We must re-sign the bundle (at least ad-hoc)
# for it to be allowed to run. # for it to be allowed to run.