🐛 fix(build.sh): add host tools and cross toolchain

README.md

@@ -37,7 +37,8 @@ bash build.sh
 
 The script installs the required APT packages with `sudo`, clones ImmortalWrt
 `v25.12.1` into `.build/immortalwrt`, configures the generic x86/64 target, and
-builds only mihomo. Generated APK files are copied to `./dist/`.
+builds the required host tools, the x86/64 cross toolchain, and mihomo. Generated
+APK files are copied to `./dist/`.
 
 To skip APT installation on later runs:
 
@@ -45,6 +46,10 @@ To skip APT installation on later runs:
 SKIP_DEPS=1 bash build.sh
 ```
 
+If a previous build failed, keep `.build/immortalwrt` and run the same command
+again. Make will reuse completed host tools and toolchain components and resume
+the build.
+
 The build directory, job count, and source version can be overridden:
 
 ```sh

build.sh

@@ -117,6 +117,14 @@ EOF
 	grep -q '^CONFIG_PACKAGE_mihomo=m$' "${SOURCE_DIR}/.config" || die "mihomo package selection failed."
 }
 
+prepare_build_system() {
+	log "Building ImmortalWrt host tools"
+	make -C "${SOURCE_DIR}" tools/install -j"${JOBS}" V=s
+
+	log "Building the x86/64 cross toolchain"
+	make -C "${SOURCE_DIR}" toolchain/install -j"${JOBS}" V=s
+}
+
 build_package() {
 	log "Building mihomo with ${JOBS} parallel jobs"
 	make -C "${SOURCE_DIR}" package/feeds/mihomo/mihomo/download -j"${JOBS}" V=s
@@ -151,5 +159,6 @@ install_dependencies
 prepare_source
 prepare_feeds
 configure_target
+prepare_build_system
 build_package
 collect_artifacts