chore(CI): Add support for building openal for macOS

CMAKE_OSX_DEPLOYMENT_TARGET has no effect when not building for macOS.

MACOSX_RPATH must be set explicitly for OpenAL to be found. It is default using newer cmake, but OpenAL is using cmake 2.6.

buildscripts/build_openal.sh

@@ -10,11 +10,19 @@ readonly SCRIPT_DIR="$(dirname "$(realpath "$0")")"
 
 source "${SCRIPT_DIR}/build_utils.sh"
 
-parse_arch --dep "openal" --supported "win32 win64" "$@"
+parse_arch --dep "openal" --supported "win32 win64 macos" "$@"
 
 "${SCRIPT_DIR}/download/download_openal.sh"
 
-patch -p1 < "${SCRIPT_DIR}/patches/openal-cmake-3-11.patch"
+if [ "${SCRIPT_ARCH}" != "macos" ]; then
+    patch -p1 < "${SCRIPT_DIR}/patches/openal-cmake-3-11.patch"
+    DDSOUND="-DDSOUND_INCLUDE_DIR=/usr/${MINGW_ARCH}-w64-mingw32/include \
+    -DDSOUND_LIBRARY=/usr/${MINGW_ARCH}-w64-mingw32/lib/libdsound.a"
+    MACOSX_RPATH=""
+else
+    DDSOUND=""
+    MACOSX_RPATH="-DCMAKE_MACOSX_RPATH=ON"
+fi
 
 export CFLAGS="-fPIC"
 cmake "-DCMAKE_INSTALL_PREFIX=${DEP_PREFIX}" \
@@ -22,8 +30,9 @@ cmake "-DCMAKE_INSTALL_PREFIX=${DEP_PREFIX}" \
     -DALSOFT_UTILS=OFF \
     -DALSOFT_EXAMPLES=OFF \
     "${CMAKE_TOOLCHAIN_FILE}" \
-    -DDSOUND_INCLUDE_DIR="/usr/${MINGW_ARCH}-w64-mingw32/include" \
-    -DDSOUND_LIBRARY="/usr/${MINGW_ARCH}-w64-mingw32/lib/libdsound.a" \
+    "${DDSOUND}" \
+    "-DCMAKE_OSX_DEPLOYMENT_TARGET=${MACOS_MINIMUM_SUPPORTED_VERSION}" \
+    "${MACOSX_RPATH}" \
     .
 
 make -j "${MAKE_JOBS}"