Fix Android libretro builds

.github/workflows/autobuild.yml

@@ -531,7 +531,7 @@ jobs:
             endian: little
           - arch_mkxpz: riscv64
             arch_alpine: riscv64
-            arch_llvm: riscv64gc-alpine-linux-musl
+            arch_llvm: riscv64-alpine-linux-musl
             cpu_family: riscv64
             cpu: rv64gc
             endian: little
@@ -604,7 +604,7 @@ jobs:
 
       - uses: actions/upload-artifact@v4
         with:
-          name: libretro-mkxp-z.linux-musl.${{ matrix.arch_mkxpz }}
+          name: libretro-mkxp-z.linux-musl.${{ matrix.arch_mkxpz }}.${{ github.event_name == 'pull_request' && format('PR{0}', github.event.number) || github.ref_name }}-${{ steps.short-sha.outputs.sha }}
           path: ${{ runner.temp }}/retro-phase2
 
   build-retro-phase2-android:
@@ -617,21 +617,25 @@ jobs:
         include:
           - arch_mkxpz: armv7
             arch_llvm: armv7a-linux-androideabi21
+            arch_cmake: armv7-a
             cpu_family: arm
             cpu: generic-armv7-a
             endian: little
           - arch_mkxpz: arm64
             arch_llvm: aarch64-linux-android21
+            arch_cmake: aarch64
             cpu_family: aarch64
             cpu: generic-armv8-a
             endian: little
           - arch_mkxpz: x86
             arch_llvm: i686-linux-android21
+            arch_cmake: i686
             cpu_family: x86
             cpu: i686
             endian: little
           - arch_mkxpz: x86_64
             arch_llvm: x86_64-linux-android21
+            arch_cmake: x86_64
             cpu_family: x86_64
             cpu: x86_64
             endian: little
@@ -672,10 +676,12 @@ jobs:
           echo "cpu_family = '${{ matrix.cpu_family }}'" | tee -a ${{ runner.temp }}/cross.ini
           echo "cpu = '${{ matrix.cpu }}'" | tee -a ${{ runner.temp }}/cross.ini
           echo "endian = '${{ matrix.endian }}'" | tee -a ${{ runner.temp }}/cross.ini
+          echo "[cmake]" | tee -a ${{ runner.temp }}/cross.ini
+          echo "CMAKE_SYSTEM_PROCESSOR = '${{ matrix.arch_cmake }}'" | tee -a ${{ runner.temp }}/cross.ini
 
           mkdir ${{ runner.temp }}/retro-phase2
           cp retro/core.info ${{ runner.temp }}/retro-phase2/libretro-mkxp-z.info
-          meson setup build --cross-file ${{ runner.temp }}/cross.ini --buildtype release -Db_lto=true -Dretro=true -Dretro_phase1_path=retro/build/retro-phase1
+          ANDROID_NDK=${{ steps.ndk.outputs.ndk-path }} meson setup build --cross-file ${{ runner.temp }}/cross.ini --buildtype release -Db_lto=true -Dretro=true -Dretro_phase1_path=retro/build/retro-phase1
           cd build
           ninja -v
           llvm-strip libretro-mkxp-z.so
@@ -683,7 +689,7 @@ jobs:
 
       - uses: actions/upload-artifact@v4
         with:
-          name: libretro-mkxp-z.android.${{ matrix.arch_mkxpz }}
+          name: libretro-mkxp-z.android.${{ matrix.arch_mkxpz }}.${{ github.event_name == 'pull_request' && format('PR{0}', github.event.number) || github.ref_name }}-${{ steps.short-sha.outputs.sha }}
           path: ${{ runner.temp }}/retro-phase2
 
   build-retro-phase2-darwin:

meson.build

@@ -1,4 +1,4 @@
-project('mkxp-z', 'c', 'cpp', version: '2.4.2', meson_version: '>=0.63.0', default_options: ['cpp_std=c++14', 'buildtype=release'])
+project('mkxp-z', 'c', 'cpp', version: '2.4.2', meson_version: '>=1.3.0', default_options: ['cpp_std=c++14', 'buildtype=release'])
 
 host_system = host_machine.system()
 host_endian = host_machine.endian()
@@ -106,11 +106,17 @@ if get_option('retro') == true
 
     retro_link_args = []
 
-    # We need to statically link the C++ standard library (libstdc++/libc++), the compiler runtime library (libgcc/compiler-rt) and libpthread in MSYS2 builds for Windows
-    if host_system == 'windows' or host_system == 'cygwin'
+    # We need to statically link the C++ standard library (libstdc++/libc++), the compiler runtime library (libgcc/compiler-rt) and libpthread in MSYS2 builds for Windows because those are not part of the operating system
+    if (host_system == 'windows' or host_system == 'cygwin') and compilers['cpp'].has_link_argument('-static')
         retro_link_args += '-static'
     endif
 
+    # Android doesn't have a built-in C++ standard library, so we need to statically link against the C++ standard library
+    if host_system == 'android'
+        compilers['cpp'].has_link_argument('-static-libstdc++', required: true)
+        retro_link_args += '-static-libstdc++'
+    endif
+
     # If possible, stop the linker from reexporting the symbols from the static libraries we use (e.g. zlib)
     if compilers['cpp'].has_link_argument('-Wl,--version-script,' + join_paths(meson.current_source_dir(), 'retro/link.T')) # Only works with GNU linker and LLVM linker
         retro_link_args += '-Wl,--version-script,' + join_paths(meson.current_source_dir(), 'retro/link.T')