Re-enable rustc_codegen_gcc tests in CI

Author: cuviper

src/ci/docker/host-x86_64/x86_64-gnu-llvm-16/Dockerfile

@@ -24,8 +24,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   xz-utils \
   nodejs \
   mingw-w64 \
+  libgccjit-12-dev \
   && rm -rf /var/lib/apt/lists/*
 
+# Note: libgccjit needs to match the default gcc version for the linker to find it.
+
 # Install powershell (universal package) so we can test x.ps1 on Linux
 RUN curl -sL "https://github.com/PowerShell/PowerShell/releases/download/v7.3.1/powershell_7.3.1-1.deb_amd64.deb" > powershell.deb && \
     dpkg -i powershell.deb && \
@@ -47,6 +50,7 @@ ENV RUST_CONFIGURE_ARGS \
       --build=x86_64-unknown-linux-gnu \
       --llvm-root=/usr/lib/llvm-16 \
       --enable-llvm-link-shared \
+      $USE_NEW_MANGLING \
       --set rust.thin-lto-import-instr-limit=10
 
 COPY host-x86_64/x86_64-gnu-llvm-16/script.sh /tmp/

src/ci/docker/host-x86_64/x86_64-gnu-llvm-17/Dockerfile

@@ -24,8 +24,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   xz-utils \
   nodejs \
   mingw-w64 \
+  libgccjit-13-dev \
   && rm -rf /var/lib/apt/lists/*
 
+# Note: libgccjit needs to match the default gcc version for the linker to find it.
+
 # Install powershell (universal package) so we can test x.ps1 on Linux
 RUN curl -sL "https://github.com/PowerShell/PowerShell/releases/download/v7.3.1/powershell_7.3.1-1.deb_amd64.deb" > powershell.deb && \
     dpkg -i powershell.deb && \
@@ -43,6 +46,7 @@ ENV RUST_CONFIGURE_ARGS \
       --build=x86_64-unknown-linux-gnu \
       --llvm-root=/usr/lib/llvm-17 \
       --enable-llvm-link-shared \
+      $USE_NEW_MANGLING \
       --set rust.thin-lto-import-instr-limit=10
 
 COPY host-x86_64/x86_64-gnu-llvm-16/script.sh /tmp/

src/ci/docker/run.sh

@@ -269,14 +269,14 @@ touch $objdir/${SUMMARY_FILE}
 
 extra_env=""
 if [ "$ENABLE_GCC_CODEGEN" = "1" ]; then
-  extra_env="$EXTRA_ENV --env ENABLE_GCC_CODEGEN=1"
+  extra_env="$extra_env --env ENABLE_GCC_CODEGEN=1"
   # If `ENABLE_GCC_CODEGEN` is set and not empty, we add the `--enable-new-symbol-mangling`
   # argument to `RUST_CONFIGURE_ARGS` and set the `GCC_EXEC_PREFIX` environment variable.
   # `cg_gcc` doesn't support the legacy mangling so we need to enforce the new one
   # if we run `cg_gcc` tests.
-  extra_env="$EXTRA_ENV --env USE_NEW_MANGLING=--enable-new-symbol-mangling"
+  extra_env="$extra_env --env USE_NEW_MANGLING=--enable-new-symbol-mangling"
   # Fix rustc_codegen_gcc lto issues.
-  extra_env="$EXTRA_ENV --env GCC_EXEC_PREFIX=/usr/lib/gcc/"
+  extra_env="$extra_env --env GCC_EXEC_PREFIX=/usr/lib/gcc/"
   echo "Setting extra environment values for docker: $extra_env"
 fi