enable in ci

Author: tgross35

ci/run.sh

@@ -167,4 +167,119 @@ for rlib in "${rlib_paths[@]}"; do
     fi
 done
 
-true
+# Libm tests
+flags=()
+# We enumerate features manually.
+flags+=(--no-default-features)
+
+# Enable arch-specific routines when available.
+flags+=(--features arch)
+
+# Always enable `unstable-float` since it expands available API but does not
+# change any implementations.
+flags+=(--features unstable-float)
+
+# We need to specifically skip tests for musl-math-sys on systems that can't
+# build musl since otherwise `--all` will activate it.
+case "$target" in
+    # Can't build at all on MSVC, WASM, or thumb
+    *windows-msvc*) flags+=(--exclude musl-math-sys) ;;
+    *wasm*) flags+=(--exclude musl-math-sys) ;;
+    *thumb*) flags+=(--exclude musl-math-sys) ;;
+
+    # We can build musl on MinGW but running tests gets a stack overflow
+    *windows-gnu*) ;;
+    # FIXME(#309): LE PPC crashes calling the musl version of some functions. It
+    # seems like a qemu bug but should be investigated further at some point.
+    # See <https://github.com/rust-lang/libm/issues/309>.
+    *powerpc64le*) ;;
+
+    # Everything else gets musl enabled
+    *) flags+=(--features libm-test/build-musl) ;;
+esac
+
+# Configure which targets test against MPFR
+case "$target" in
+    # MSVC cannot link MPFR
+    *windows-msvc*) ;;
+    # FIXME: MinGW should be able to build MPFR, but setup in CI is nontrivial.
+    *windows-gnu*) ;;
+    # Targets that aren't cross compiled in CI work fine
+    aarch64*apple*) flags+=(--features libm-test/build-mpfr) ;;
+    aarch64*linux*) flags+=(--features libm-test/build-mpfr) ;;
+    i586*) flags+=(--features libm-test/build-mpfr --features gmp-mpfr-sys/force-cross) ;;
+    i686*) flags+=(--features libm-test/build-mpfr) ;;
+    x86_64*) flags+=(--features libm-test/build-mpfr) ;;
+esac
+
+# FIXME: `STATUS_DLL_NOT_FOUND` testing macros on CI.
+# <https://github.com/rust-lang/rust/issues/128944>
+case "$target" in
+    *windows-gnu) flags+=(--exclude libm-macros) ;;
+esac
+
+# Make sure we can build with overriding features.
+cargo check -p libm --no-default-features
+
+if [ "${BUILD_ONLY:-}" = "1" ]; then
+    # If we are on targets that can't run tests, verify that we can build.
+    cmd=(cargo build --target $target --package libm)
+    "${cmd[@]}"
+    "${cmd[@]}" --features unstable-intrinsics
+
+    echo "can't run tests on $target; skipping"
+    exit
+fi
+
+flags+=($flags --all --target "$target")
+cmd=(cargo test "${flags[@]}")
+profile="--profile"
+
+# If nextest is available, use that
+command -v cargo-nextest && nextest=1 || nextest=0
+if [ "$nextest" = "1" ]; then
+    # Workaround for https://github.com/nextest-rs/nextest/issues/2066
+    if [ -f /.dockerenv ]; then
+        cfg_file=(/tmp/nextest-config.toml)
+        echo "[store]" >> "$cfg_file"
+        echo "dir = \"$CARGO_TARGET_DIR/nextest\"" >> "$cfg_file"
+        cfg_flag=(--config-file $cfg_file)
+    fi
+
+    cmd=(cargo nextest run ${cfg_flag:-} --max-fail=10 $flags)
+    profile="--cargo-profile"
+fi
+
+# Test once without intrinsics
+"${cmd[@]}"
+
+# Run doctests if they were excluded by nextest
+[ "$nextest" = "1" ] && cargo test --doc $flags
+
+# Exclude the macros and utile crates from the rest of the tests to save CI
+# runtime, they shouldn't have anything feature- or opt-level-dependent.
+cmd+=(--exclude util --exclude libm-macros)
+
+# Test once with intrinsics enabled
+"${cmd[@]}" --features unstable-intrinsics
+"${cmd[@]}" --features unstable-intrinsics --benches
+
+# Test the same in release mode, which also increases coverage. Also ensure
+# the soft float routines are checked.
+"${cmd[@]}" "$profile" release-checked
+"${cmd[@]}" "$profile" release-checked --features force-soft-floats
+"${cmd[@]}" "$profile" release-checked --features unstable-intrinsics
+"${cmd[@]}" "$profile" release-checked --features unstable-intrinsics --benches
+
+# Ensure that the routines do not panic.
+# 
+# `--tests` must be passed because no-panic is only enabled as a dev
+# dependency. The `release-opt` profile must be used to enable LTO and a
+# single CGU.
+ENSURE_NO_PANIC=1 cargo build \
+     -p libm \
+    --target "$target" \
+    --no-default-features \
+    --features unstable-float \
+    --tests \
+    --profile release-opt