From 19051f5af80f1ba628507628d4499f644f2a5730 Mon Sep 17 00:00:00 2001
From: SerinaNya <34389622+SerinaNya@users.noreply.github.com>
Date: Wed, 5 Aug 2026 16:04:49 +0800
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20fix(build.sh):=20add=20host=20to?=
 =?UTF-8?q?ols=20and=20cross=20toolchain?=
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---
 README.md | 7 ++++++-
 build.sh  | 9 +++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 8fc1477..86011c0 100644
--- a/README.md
+++ b/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
diff --git a/build.sh b/build.sh
index dd293b8..be7f718 100644
--- a/build.sh
+++ b/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