[build,mac] deployment target & arch variables

allow easy change of target architectures and deployment target

scripts/bundle-mac-os.sh

@@ -11,14 +11,23 @@ BINDIR=MacOS
 LIBDIR=Frameworks
 DATADIR=Resources
 
-OSSL_FLAGS="-arch arm64 -arch x86_64"
+DEPLOYMENT_ARCH="arm64 x86_64"
+DEPLOYMENT_TARGET=12
+
+CMAKE_ARCHS=
+OSSL_FLAGS="-mmacosx-version-min=$DEPLOYMENT_TARGET"
+for $ARCH in $DEPLOYMENT_ARCH;
+do
+	OSSL_FLAGS="$OSSL_FLAGS -arch $ARCH"
+	CMAKE_ARCHS="$CMAKE_ARCHS;$ARCH"
+done
 
 CMAKE_ARGS="-DCMAKE_SKIP_INSTALL_ALL_DEPENDENCY=ON \
 	-DCMAKE_VERBOSE_MAKEFILE=ON \
 	-DCMAKE_BUILD_TYPE=Release \
 	-DBUILD_SHARED_LIBS=ON \
-	-DCMAKE_OSX_ARCHITECTURES='arm64;x86_64' \
-	-DCMAKE_OSX_DEPLOYMENT_TARGET=12 \
+	-DCMAKE_OSX_ARCHITECTURES=$CMAKE_ARCHS \
+	-DCMAKE_OSX_DEPLOYMENT_TARGET=$DEPLOYMENT_TARGET \
 	-DCMAKE_INSTALL_PREFIX='$INSTALL' \
 	-DCMAKE_INSTALL_LIBDIR='$LIBDIR' \
 	-DCMAKE_INSTALL_BINDIR='$BINDIR' \