ci: Organise shared helper scripts

Move shared helper scripts used by Docker builds under docker/scripts.

Author: mrkajetanp

src/ci/docker/host-aarch64/dist-aarch64-linux/Dockerfile

@@ -43,10 +43,12 @@ ENV LD_LIBRARY_PATH=/rustroot/lib64:/rustroot/lib32:/rustroot/lib
 ENV PKG_CONFIG_PATH=/rustroot/lib/pkgconfig
 WORKDIR /tmp
 RUN mkdir /home/user
-COPY host-aarch64/dist-aarch64-linux/shared.sh /tmp/
+COPY scripts/shared.sh /tmp/
 
 # Need at least GCC 5.1 to compile LLVM
-COPY host-aarch64/dist-aarch64-linux/build-gcc.sh /tmp/
+COPY scripts/build-gcc.sh /tmp/
+ENV GCC_VERSION=9.5.0
+ENV GCC_BUILD_TARGET=aarch64-unknown-linux-gnu
 RUN ./build-gcc.sh && yum remove -y gcc gcc-c++
 
 ENV CC=gcc CXX=g++
@@ -56,12 +58,13 @@ COPY scripts/cmake.sh /tmp/
 RUN ./cmake.sh
 
 # Build LLVM+Clang
-COPY host-aarch64/dist-aarch64-linux/build-clang.sh /tmp/
+COPY scripts/build-clang.sh /tmp/
+ENV LLVM_BUILD_TARGETS=AArch64
 RUN ./build-clang.sh
 ENV CC=clang CXX=clang++
 
 # Build zstd to enable `llvm.libzstd`.
-COPY host-aarch64/dist-aarch64-linux/build-zstd.sh /tmp/
+COPY scripts/build-zstd.sh /tmp/
 RUN ./build-zstd.sh
 
 COPY scripts/sccache.sh /scripts/
@@ -82,7 +85,7 @@ ENV RUST_CONFIGURE_ARGS \
       --set target.aarch64-unknown-linux-gnu.ar=/rustroot/bin/llvm-ar \
       --set target.aarch64-unknown-linux-gnu.ranlib=/rustroot/bin/llvm-ranlib \
       --set llvm.link-shared=true \
-      --set llvm.thin-lto=false \
+      --set llvm.thin-lto=true \
       --set llvm.libzstd=true \
       --set llvm.ninja=false \
       --set rust.debug-assertions=false \

src/ci/docker/host-aarch64/dist-aarch64-linux/build-clang.sh

@@ -46,19 +46,21 @@ ENV LD_LIBRARY_PATH=/rustroot/lib64:/rustroot/lib32:/rustroot/lib
 ENV PKG_CONFIG_PATH=/rustroot/lib/pkgconfig
 WORKDIR /tmp
 RUN mkdir /home/user
-COPY host-x86_64/dist-x86_64-linux/shared.sh /tmp/
+COPY scripts/shared.sh /tmp/
 
 # Need at least GCC 5.1 to compile LLVM nowadays
-COPY host-x86_64/dist-x86_64-linux/build-gcc.sh /tmp/
+COPY scripts/build-gcc.sh /tmp/
 ENV GCC_VERSION=9.5.0
+ENV GCC_BUILD_TARGET=i686-pc-linux-gnu
 RUN ./build-gcc.sh && yum remove -y gcc gcc-c++
 
 COPY scripts/cmake.sh /tmp/
 RUN ./cmake.sh
 
 # Now build LLVM+Clang, afterwards configuring further compilations to use the
 # clang/clang++ compilers.
-COPY host-x86_64/dist-x86_64-linux/build-clang.sh /tmp/
+COPY scripts/build-clang.sh /tmp/
+ENV LLVM_BUILD_TARGETS=X86
 RUN ./build-clang.sh
 ENV CC=clang CXX=clang++
 

src/ci/docker/host-aarch64/dist-aarch64-linux/build-gcc.sh

@@ -18,7 +18,7 @@ RUN /scripts/crosstool-ng-build.sh
 WORKDIR /build
 
 RUN apt-get install -y --no-install-recommends rpm2cpio cpio
-COPY host-x86_64/dist-powerpc64le-linux/shared.sh host-x86_64/dist-powerpc64le-linux/build-powerpc64le-toolchain.sh /build/
+COPY scripts/shared.sh host-x86_64/dist-powerpc64le-linux/build-powerpc64le-toolchain.sh /build/
 RUN ./build-powerpc64le-toolchain.sh
 
 COPY scripts/sccache.sh /scripts/

src/ci/docker/host-aarch64/dist-aarch64-linux/shared.sh

@@ -47,11 +47,12 @@ ENV PKG_CONFIG_PATH=/rustroot/lib/pkgconfig
 # Clang needs to access GCC headers to enable linker plugin LTO
 WORKDIR /tmp
 RUN mkdir /home/user
-COPY host-x86_64/dist-x86_64-linux/shared.sh /tmp/
+COPY scripts/shared.sh /tmp/
 
 # Need at least GCC 5.1 to compile LLVM nowadays
-COPY host-x86_64/dist-x86_64-linux/build-gcc.sh /tmp/
+COPY scripts/build-gcc.sh /tmp/
 ENV GCC_VERSION=9.5.0
+ENV GCC_BUILD_TARGET=x86_64-pc-linux-gnu
 RUN ./build-gcc.sh && yum remove -y gcc gcc-c++
 
 # LLVM 17 needs cmake 3.20 or higher.
@@ -60,12 +61,13 @@ RUN ./cmake.sh
 
 # Now build LLVM+Clang, afterwards configuring further compilations to use the
 # clang/clang++ compilers.
-COPY host-x86_64/dist-x86_64-linux/build-clang.sh /tmp/
+COPY scripts/build-clang.sh /tmp/
+ENV LLVM_BUILD_TARGETS=X86
 RUN ./build-clang.sh
 ENV CC=clang CXX=clang++
 
 # Build zstd to enable `llvm.libzstd`.
-COPY host-x86_64/dist-x86_64-linux/build-zstd.sh /tmp/
+COPY scripts/build-zstd.sh /tmp/
 RUN ./build-zstd.sh
 
 COPY scripts/sccache.sh /scripts/