gnu: Set up the CI for _TIME_BITS=64

Add new jobs for i686 in test_tier1 and arm and powerpc in test_tier2
where RUST_LIBC_UNSTABLE_GNU_TIME_BITS=64.

Use artifact-tag to avoid artifact name collisions.

Author: snogge

.github/workflows/ci.yaml

@@ -98,6 +98,12 @@ jobs:
             artifact-tag: offset-bits64
             env:
               RUST_LIBC_UNSTABLE_GNU_FILE_OFFSET_BITS: 64
+          - target: i686-unknown-linux-gnu
+            docker: true
+            os: ubuntu-24.04
+            artifact-tag: time-bits64
+            env:
+              RUST_LIBC_UNSTABLE_GNU_TIME_BITS: 64
           - target: x86_64-unknown-linux-gnu
             docker: true
             os: ubuntu-24.04
@@ -195,13 +201,21 @@ jobs:
             env:
               RUST_LIBC_UNSTABLE_GNU_FILE_OFFSET_BITS: 64
             artifact-tag: offset-bits64
+          - target: arm-unknown-linux-gnueabihf
+            env:
+              RUST_LIBC_UNSTABLE_GNU_TIME_BITS: 64
+            artifact-tag: time-bits64
           # FIXME(ppc): SIGILL running tests, see
           # https://github.com/rust-lang/libc/pull/4254#issuecomment-2636288713
           # - target: powerpc-unknown-linux-gnu
           # - target: powerpc-unknown-linux-gnu
           #   env:
           #     RUST_LIBC_UNSTABLE_GNU_FILE_OFFSET_BITS: 64
           #   artifact-tag: offset-bits64
+          # - target: powerpc-unknown-linux-gnu
+          #   env:
+          #     RUST_LIBC_UNSTABLE_GNU_TIME_BITS: 64
+          #   artifact-tag: time-bits64
     timeout-minutes: 25
     env:
       TARGET: ${{ matrix.target }}

ci/run-docker.sh

@@ -44,6 +44,7 @@ run() {
         --env LIBC_CI \
         --env LIBC_CI_ZBUILD_STD \
         --env RUST_LIBC_UNSTABLE_GNU_FILE_OFFSET_BITS \
+        --env RUST_LIBC_UNSTABLE_GNU_TIME_BITS \
         --env CARGO_HOME=/cargo \
         --env CARGO_TARGET_DIR=/checkout/target \
         --volume "$CARGO_HOME":/cargo \

ci/verify-build.sh

@@ -77,7 +77,9 @@ test_target() {
         case "$target" in
             # Test with the equivalent of __FILE_OFFSET_BITS=64
             arm*-gnu*|i*86*-gnu|powerpc-*-gnu*|mips*-gnu|sparc-*-gnu|thumb-*gnu*)
-                RUST_LIBC_UNSTABLE_GNU_FILE_OFFSET_BITS=64 $cmd;;
+                RUST_LIBC_UNSTABLE_GNU_FILE_OFFSET_BITS=64 $cmd
+                RUST_LIBC_UNSTABLE_GNU_TIME_BITS=64 $cmd
+                ;;
         esac
     fi