Fix release build: Set RUSTFLAGS to link with libgcc statically

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

.github/workflows/build.yml

@@ -110,6 +110,8 @@ jobs:
 
     - name: Build
       run: ${{ env.CTOOL }} build ${{ env.CARGS }}
+      env:
+        RUSTFLAGS: ${{ env.RUSTFLAGS }}
 
     - name: Get output
       shell: bash

ci-scripts/compile-settings.jq

@@ -9,9 +9,16 @@ if $for_release then {
   output: "debug",
   profile: "dev",
   args: ($matrix.debug_build_args // ""),
+  rustflags: "",
   features: ($matrix.debug_features // ["rustls", "fancy-with-backtrace"]),
 } end
 |
+.rustflags = (
+  if $for_release and $matrix.target == "aarch64-unknown-linux-musl" or $matrix.target == "armv7-unknown-linux-musleabihf"
+  then "-C link-arg=-lgcc -Clink-arg=-static-libgcc"
+  else "" end
+)
+|
 .features = (
   if (.features | length > 0)
   then "--no-default-features --features \(.features | join(","))"
@@ -23,6 +30,7 @@ if $for_release then {
   CTOOL: (if ($matrix."use-cross" // false) then "cross" else "cargo" end),
   COUTPUT: .output,
   CARGS: "--target \($matrix.target) --profile \(.profile) \(.features) \(.args)",
+  RUSTFLAGS: .rustflags,
 }
 |
 to_entries[] | "\(.key)=\(.value)"