feat: add loongarch64-unknown-linux-gnu image

.github/ISSUE_TEMPLATE/b_issue_report.yml

@@ -52,6 +52,7 @@ body:
         - i686-unknown-freebsd
         - i686-unknown-linux-gnu
         - i686-unknown-linux-musl
+        - loongarch64-unknown-linux-gnu
         - mips64el-unknown-linux-gnuabi64
         - mips64el-unknown-linux-muslabi64
         - mips64-unknown-linux-gnuabi64

README.md

@@ -224,6 +224,7 @@ terminate.
 | `i686-linux-android` [1]               | 9.0.8  | 9.0.8  | ✓   | 6.1.0 |   ✓    |
 | `i686-pc-windows-gnu`                  | N/A    | 9.4    | ✓   | N/A   |   ✓    |
 | `i686-unknown-linux-gnu`               | 2.31   | 9.4.0  | ✓   | 6.1.0 |   ✓    |
+| `loongarch64-unknown-linux-gnu`        | 2.36   | 13.2.0 | ✓   | N/A   |        |
 | `mips-unknown-linux-gnu`               | 2.30   | 9.4.0  | ✓   | 6.1.0 |   ✓    |
 | `mips-unknown-linux-musl`              | 1.2.3  | 9.2.0  | ✓   | 6.1.0 |   ✓    |
 | `mips64-unknown-linux-gnuabi64`        | 2.30   | 9.4.0  | ✓   | 6.1.0 |   ✓    |

docker/Dockerfile.loongarch64-unknown-linux-gnu

@@ -0,0 +1,33 @@
+FROM ubuntu:20.04 as cross-base
+ENV DEBIAN_FRONTEND=noninteractive
+
+COPY common.sh lib.sh /
+RUN /common.sh
+
+COPY cmake.sh /
+RUN /cmake.sh
+
+COPY xargo.sh /
+RUN /xargo.sh
+
+FROM cross-base as build
+
+ARG VERBOSE
+COPY crosstool-ng.sh /
+COPY crosstool-config/loongarch64-unknown-linux-gnu.config /
+RUN /crosstool-ng.sh loongarch64-unknown-linux-gnu.config 5
+
+ENV PATH /x-tools/loongarch64-unknown-linux-gnu/bin/:$PATH
+
+COPY toolchain.cmake /opt/toolchain.cmake
+
+ENV CROSS_TOOLCHAIN_PREFIX=loongarch64-unknown-linux-gnu-
+ENV CARGO_TARGET_LOONGARCH64_UNKNOWN_LINUX_GNU_LINKER="$CROSS_TOOLCHAIN_PREFIX"gcc \
+    AR_loongarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"ar \
+    CC_loongarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"gcc \
+    CXX_loongarch64_unknown_linux_gnu="$CROSS_TOOLCHAIN_PREFIX"g++ \
+    CMAKE_TOOLCHAIN_FILE_loongarch64_unknown_linux_gnu=/opt/toolchain.cmake \
+    CROSS_CMAKE_SYSTEM_NAME=Linux \
+    CROSS_CMAKE_SYSTEM_PROCESSOR=loongarch64 \
+    CROSS_CMAKE_CRT=gnu \
+    CROSS_CMAKE_OBJECT_FLAGS="-ffunction-sections -fdata-sections -fPIC"