add luajit to justfile

rust/justfile

@@ -61,6 +61,32 @@ _build_netfilter_libs target_arch:
             patch -p1 -d libnetfilter_queue-* -i $PATCH
         fi
 
+        if [ ! -d "luajit2-*" ]; then
+            wget -qO- https://github.com/openresty/luajit2/archive/refs/tags/v2.1-20250826.tar.gz | tar -xz
+        fi
+
+        case "{{target_arch}}" in
+          *64*)
+            HOSTCC="cc"
+            ;;
+          *)
+            HOSTCC="cc -m32"
+        esac
+
+        (
+          cd luajit2-*
+          make BUILDMODE=static XCFLAGS=-DLUAJIT_DISABLE_FFI \
+               HOST_CC="$HOSTCC" CROSS= CC="$CC" \
+               TARGET_AR="$AR rcus" TARGET_STRIP=$STRIP \
+               CFLAGS="-Os -flto=auto $CFLAGS" -j$(nproc)
+
+          make install PREFIX= DESTDIR=$NETFILTER_LIBS-{{target_arch}}
+        )
+
+        LJIT=1
+        LCFLAGS="-I${NETFILTER_LIBS-{{target_arch}}}/include/luajit-2.1"
+        LLIB="-L${NETFILTER_LIBS-{{target_arch}}}/lib -lluajit-2.1"
+
         for i in libmnl libnfnetlink libnetfilter_queue ; do
         (
             cd $i-*
@@ -101,6 +127,9 @@ build-android *args: prepare-android
             export CFLAGS="-I$NETFILTER_LIBS-$t/include"
             export LDFLAGS="-L$NETFILTER_LIBS-$t/lib"
             export CXXFLAGS="$CFLAGS"
+            export LJIT=1
+            export LCFLAGS="-I$NETFILTER_LIBS-$t/include/luajit-2.1"
+            export LLIB="-L$NETFILTER_LIBS-$t/lib -lluajit-2.1"
 
             just _build_netfilter_libs $t
             just _instal_rust_target $t