From 42f48ae1eaa8e16a859606a11cbe5148e8e0a1e1 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 6 Oct 2026 03:04:12 +0000
Subject: [PATCH 1/2] Initial plan


From 16143bce8719f6f685f40fedbdc68a8125651e08 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 6 Oct 2026 03:07:00 +0000
Subject: [PATCH 2/2] Add robust GNU archive mirror fallback

Co-authored-by: chris1111 <6248794+chris1111@users.noreply.github.com>
---
 build_gcc16.sh | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/build_gcc16.sh b/build_gcc16.sh
index 0274c8fe61..de77266203 100755
--- a/build_gcc16.sh
+++ b/build_gcc16.sh
@@ -147,6 +147,22 @@ function mountRamDisk() {
 }
 
 # Download #
+DownloadGNU () {
+    local path="$1"
+    local url
+
+    rm -f download.tmp
+    for url in "https://ftp.gnu.org/gnu/${path}" "https://ftpmirror.gnu.org/${path}" "https://ftp.fu-berlin.de/unix/gnu/${path}"; do
+        if curl -k -f -L --connect-timeout 15 --retry 2 --retry-connrefused \
+            -o download.tmp "$url"; then
+            return 0
+        fi
+    done
+
+    rm -f download.tmp
+    return 1
+}
+
 DownloadSource () {
     if [[ ! -f ${DIR_DOWNLOADS}/${ISL_VERSION}.tar.xz ]]; then
        echo "Status: ${ISL_VERSION} not found."
@@ -163,19 +179,19 @@ DownloadSource () {
     cd $DIR_DOWNLOADS
     if [[ ! -f ${DIR_DOWNLOADS}/${GMP_VERSION}.tar.xz ]]; then
         echo "Status: ${GMP_VERSION} not found."
-        curl -k -f -o download.tmp --remote-name https://ftp.gnu.org/gnu/gmp/${GMP_VERSION}.tar.xz || exit 1
+        DownloadGNU "gmp/${GMP_VERSION}.tar.xz" || exit 1
         mv download.tmp ${GMP_VERSION}.tar.xz
     fi
 
     if [[ ! -f ${DIR_DOWNLOADS}/${MPFR_VERSION}.tar.xz ]]; then
         echo "Status: ${MPFR_VERSION} not found."
-        curl -k -f -o download.tmp --remote-name https://ftp.gnu.org/gnu/mpfr/${MPFR_VERSION}.tar.xz || exit 1
+        DownloadGNU "mpfr/${MPFR_VERSION}.tar.xz" || exit 1
         mv download.tmp ${MPFR_VERSION}.tar.xz
     fi
 
     if [[ ! -f ${DIR_DOWNLOADS}/${MPC_VERSION}.tar.gz ]]; then
         echo "Status: ${MPC_VERSION} not found."
-        curl -k -f -o download.tmp --remote-name https://ftp.gnu.org/gnu/mpc/${MPC_VERSION}.tar.gz || exit 1
+        DownloadGNU "mpc/${MPC_VERSION}.tar.gz" || exit 1
 #				curl -k -f -o download.tmp --remote-name https://ftp.fu-berlin.de/unix/gnu/mpc/${MPC_VERSION}.tar.gz || exit 1
         mv download.tmp ${MPC_VERSION}.tar.gz
     fi
@@ -193,7 +209,7 @@ DownloadSource () {
 
     if [[ ! -f ${DIR_DOWNLOADS}/$BINUTILS_VERSION.tar.xz ]]; then
         echo "Status: $BINUTILS_VERSION not found."
-        curl -k -f -o download.tmp --remote-name https://ftp.gnu.org/gnu/binutils/binutils-2.46.1.tar.xz || exit 1
+        DownloadGNU "binutils/binutils-2.46.1.tar.xz" || exit 1
         mv download.tmp $BINUTILS_VERSION.tar.xz
     fi