github: build sdl2 locally for linux releases (CleverRaven#72026)

.github/workflows/release.yml

@@ -215,8 +215,16 @@ jobs:
       - name: Install dependencies (Linux)
         if: runner.os == 'Linux' && matrix.mxe == 'none' && matrix.android == 'none' && !matrix.wasm
         run: |
+          git clone https://github.com/libsdl-org/SDL.git --branch release-2.0.20 --depth 1
+          cd SDL
+          mkdir build
+          cd build
+          ../configure
+          make -j$((`nproc`+0))
+          sudo make install
+          cp ../LICENSE.txt ${{ github.workspace }}/LICENSE-SDL.txt
           sudo apt-get update
-          sudo apt-get install libncursesw5-dev libsdl2-dev libsdl2-ttf-dev libsdl2-image-dev \
+          sudo apt-get install libncursesw5-dev libsdl2-ttf-dev libsdl2-image-dev \
             libsdl2-mixer-dev libpulse-dev ccache gettext parallel
       - name: Install Emscripten (WebAssembly)
         if: matrix.wasm

Makefile

@@ -895,6 +895,11 @@ endif
 
 ifeq ($(TARGETSYSTEM),LINUX)
   BINDIST_EXTRAS += cataclysm-launcher
+  ifneq ("$(wildcard LICENSE-SDL.txt)","")
+    SDL2_solib = $(shell ldd $(TARGET) | grep libSDL2-2\.0 | cut -d ' ' -f 3)
+    INSTALL_EXTRAS += $(SDL2_solib)
+    BINDIST_EXTRAS += LICENSE-SDL.txt
+  endif
   ifeq ($(BACKTRACE),1)
     # -rdynamic needed for symbols in backtraces
     LDFLAGS += -rdynamic
@@ -1296,6 +1301,7 @@ endif  # ifeq ($(NATIVE), osx)
 $(BINDIST): distclean version $(TARGET) $(L10N) $(BINDIST_EXTRAS) $(BINDIST_LOCALE)
 	mkdir -p $(BINDIST_DIR)
 	cp -R $(TARGET) $(BINDIST_EXTRAS) $(BINDIST_DIR)
+	$(foreach lib,$(INSTALL_EXTRAS), install --strip $(lib) $(BINDIST_DIR))
 ifdef LANGUAGES
 	cp -R --parents lang/mo $(BINDIST_DIR)
 endif

cataclysm-launcher

@@ -45,7 +45,7 @@ fi
 
 if [ "$BIN" ]
 then
-    exec ./$BIN "$@"
+    env LD_LIBRARY_PATH="${DIR}:${LD_LIBRARY_PATH}" ./"${BIN}" "$@"
 else
     printerr "Couldn't find cataclysm game binary in '$DIR'/"
     exit 1