libretro-desmume: fix build

ported from https://github.com/5schatten/LibreELEC-RR/tree/master-rr/packages/5schatten/emulation/libretro/desmume

Signed-off-by: Matthias Reichl <hias@horus.com>

packages/emulation/libretro-desmume/package.mk

@@ -7,26 +7,20 @@ PKG_SHA256="13713a32e2e797308f6a677a0a8e65c628339519bd9a8a10b8a495c5120aa1d6"
 PKG_LICENSE="GPLv2"
 PKG_SITE="https://github.com/libretro/desmume"
 PKG_URL="https://github.com/libretro/desmume/archive/$PKG_VERSION.tar.gz"
-PKG_DEPENDS_TARGET="toolchain kodi-platform"
+PKG_DEPENDS_TARGET="toolchain kodi-platform libpcap"
 PKG_LONGDESC="libretro wrapper for desmume NDS emulator."
 PKG_TOOLCHAIN="make"
 
 PKG_LIBNAME="desmume_libretro.so"
-PKG_LIBPATH="desmume/$PKG_LIBNAME"
+PKG_LIBPATH="desmume/src/frontend/libretro/${PKG_LIBNAME}"
 PKG_LIBVAR="DESMUME_LIB"
 
-make_target() {
-  case $TARGET_CPU in
-    arm1176jzf-s)
-      make -C desmume -f Makefile.libretro platform=armv6-hardfloat-$TARGET_CPU
-      ;;
-    cortex-a7|cortex-a9)
-      make -C desmume -f Makefile.libretro platform=armv7-neon-hardfloat-$TARGET_CPU
-      ;;
-    x86-64)
-      make -C desmume -f Makefile.libretro
-      ;;
-  esac
+PKG_MAKE_OPTS_TARGET="-C desmume/src/frontend/libretro GIT_VERSION=${PKG_VERSION:0:7}"
+
+pre_configure_target() {
+  if [ "${ARCH}" = "arm" ]; then
+    PKG_MAKE_OPTS_TARGET+=" platform=armv-${TARGET_FLOAT}float-${TARGET_CPU}"
+  fi
 }
 
 makeinstall_target() {