[Bug] various arches fail compilation

[werdahias]

Hi,
I packaged your crates for debian. It builds fine, but only for a few arches:
arm64 (aarch64), amd64 (x86-64), mips64el, ppc64el and s390x.

i386 (x86), armel, armhf and mipsel all fail to build:

Compiling effective-limits v0.5.5 (/<<PKGBUILDDIR>>)
     Running `CARGO=/usr/bin/cargo CARGO_CRATE_NAME=effective_limits CARGO_MANIFEST_DIR=/<<PKGBUILDDIR>> CARGO_PKG_AUTHORS='Robert Collins <robertc@robertcollins.net>' CARGO_PKG_DESCRIPTION='Estimate effective resource limits for a process e.g. how much RAM is available for use.' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE=Apache-2.0 CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=effective-limits CARGO_PKG_REPOSITORY='https://github.com/rbtcollins/effective-limits.rs' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.5.5 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=5 CARGO_PKG_VERSION_PATCH=5 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 LD_LIBRARY_PATH='/<<PKGBUILDDIR>>/target/debug/deps:/usr/lib' rustc --crate-name effective_limits --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=263c2e754137088a -C extra-filename=-263c2e754137088a --out-dir /<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps --target armv5te-unknown-linux-gnueabi -C incremental=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/incremental -L dependency=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps -L dependency=/<<PKGBUILDDIR>>/target/debug/deps --extern cfg_if=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libcfg_if-8c4955b915cf7a00.rmeta --extern libc=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/liblibc-b5f738817e952bc8.rmeta --extern sys_info=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libsys_info-00d91cb13fc01bb9.rmeta --extern thiserror=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libthiserror-0666c8194ad7abc4.rmeta -C debuginfo=2 --cap-lints warn -C linker=arm-linux-gnueabi-gcc -C link-arg=-Wl,-z,relro --remap-path-prefix /<<PKGBUILDDIR>>=/usr/share/cargo/registry/effective-limits-0.5.5 --remap-path-prefix /<<PKGBUILDDIR>>/debian/cargo_registry=/usr/share/cargo/registry -L native=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/build/sys-info-99a6b51ff8ec64b0/out`
     Running `CARGO=/usr/bin/cargo CARGO_CRATE_NAME=effective_limits CARGO_MANIFEST_DIR=/<<PKGBUILDDIR>> CARGO_PKG_AUTHORS='Robert Collins <robertc@robertcollins.net>' CARGO_PKG_DESCRIPTION='Estimate effective resource limits for a process e.g. how much RAM is available for use.' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE=Apache-2.0 CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=effective-limits CARGO_PKG_REPOSITORY='https://github.com/rbtcollins/effective-limits.rs' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.5.5 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=5 CARGO_PKG_VERSION_PATCH=5 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 LD_LIBRARY_PATH='/<<PKGBUILDDIR>>/target/debug/deps:/usr/lib' rustc --crate-name effective_limits --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test -C metadata=dc26cd84d2421c51 -C extra-filename=-dc26cd84d2421c51 --out-dir /<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps --target armv5te-unknown-linux-gnueabi -C incremental=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/incremental -L dependency=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps -L dependency=/<<PKGBUILDDIR>>/target/debug/deps --extern cfg_if=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libcfg_if-8c4955b915cf7a00.rlib --extern libc=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/liblibc-b5f738817e952bc8.rlib --extern sys_info=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libsys_info-00d91cb13fc01bb9.rlib --extern thiserror=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libthiserror-0666c8194ad7abc4.rlib -C debuginfo=2 --cap-lints warn -C linker=arm-linux-gnueabi-gcc -C link-arg=-Wl,-z,relro --remap-path-prefix /<<PKGBUILDDIR>>=/usr/share/cargo/registry/effective-limits-0.5.5 --remap-path-prefix /<<PKGBUILDDIR>>/debian/cargo_registry=/usr/share/cargo/registry -L native=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/build/sys-info-99a6b51ff8ec64b0/out`
     Running `CARGO=/usr/bin/cargo CARGO_BIN_NAME=test-limited CARGO_CRATE_NAME=test_limited CARGO_MANIFEST_DIR=/<<PKGBUILDDIR>> CARGO_PKG_AUTHORS='Robert Collins <robertc@robertcollins.net>' CARGO_PKG_DESCRIPTION='Estimate effective resource limits for a process e.g. how much RAM is available for use.' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE=Apache-2.0 CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=effective-limits CARGO_PKG_REPOSITORY='https://github.com/rbtcollins/effective-limits.rs' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.5.5 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=5 CARGO_PKG_VERSION_PATCH=5 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 LD_LIBRARY_PATH='/<<PKGBUILDDIR>>/target/debug/deps:/usr/lib' rustc --crate-name test_limited --edition=2018 src/bin/test-limited.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test -C metadata=3cf1f99cb441efbf -C extra-filename=-3cf1f99cb441efbf --out-dir /<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps --target armv5te-unknown-linux-gnueabi -C incremental=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/incremental -L dependency=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps -L dependency=/<<PKGBUILDDIR>>/target/debug/deps --extern cfg_if=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libcfg_if-8c4955b915cf7a00.rlib --extern effective_limits=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libeffective_limits-263c2e754137088a.rlib --extern libc=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/liblibc-b5f738817e952bc8.rlib --extern sys_info=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libsys_info-00d91cb13fc01bb9.rlib --extern thiserror=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libthiserror-0666c8194ad7abc4.rlib -C debuginfo=2 --cap-lints warn -C linker=arm-linux-gnueabi-gcc -C link-arg=-Wl,-z,relro --remap-path-prefix /<<PKGBUILDDIR>>=/usr/share/cargo/registry/effective-limits-0.5.5 --remap-path-prefix /<<PKGBUILDDIR>>/debian/cargo_registry=/usr/share/cargo/registry -L native=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/build/sys-info-99a6b51ff8ec64b0/out`
     Running `CARGO=/usr/bin/cargo CARGO_CRATE_NAME=memory CARGO_MANIFEST_DIR=/<<PKGBUILDDIR>> CARGO_PKG_AUTHORS='Robert Collins <robertc@robertcollins.net>' CARGO_PKG_DESCRIPTION='Estimate effective resource limits for a process e.g. how much RAM is available for use.' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE=Apache-2.0 CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=effective-limits CARGO_PKG_REPOSITORY='https://github.com/rbtcollins/effective-limits.rs' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.5.5 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=5 CARGO_PKG_VERSION_PATCH=5 CARGO_PKG_VERSION_PRE='' CARGO_PRIMARY_PACKAGE=1 LD_LIBRARY_PATH='/<<PKGBUILDDIR>>/target/debug/deps:/usr/lib' rustc --crate-name memory --edition=2018 examples/memory.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C metadata=d9404f750f7f7978 -C extra-filename=-d9404f750f7f7978 --out-dir /<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/examples --target armv5te-unknown-linux-gnueabi -C incremental=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/incremental -L dependency=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps -L dependency=/<<PKGBUILDDIR>>/target/debug/deps --extern cfg_if=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libcfg_if-8c4955b915cf7a00.rlib --extern effective_limits=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libeffective_limits-263c2e754137088a.rlib --extern libc=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/liblibc-b5f738817e952bc8.rlib --extern sys_info=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libsys_info-00d91cb13fc01bb9.rlib --extern thiserror=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/deps/libthiserror-0666c8194ad7abc4.rlib -C debuginfo=2 --cap-lints warn -C linker=arm-linux-gnueabi-gcc -C link-arg=-Wl,-z,relro --remap-path-prefix /<<PKGBUILDDIR>>=/usr/share/cargo/registry/effective-limits-0.5.5 --remap-path-prefix /<<PKGBUILDDIR>>/debian/cargo_registry=/usr/share/cargo/registry -L native=/<<PKGBUILDDIR>>/target/armv5te-unknown-linux-gnueabi/debug/build/sys-info-99a6b51ff8ec64b0/out`
error[E0308]: mismatched types
   --> src/lib.rs:380:43
    |
380 | ...                   rlim_cur: ulimit,
    |                                 ^^^^^^ expected `u32`, found `u64`

For more information about this error, try `rustc --explain E0308`.

This looks like an arch-related bug to me.

[rbtcollins]

Yep, sadly this is interfacing to C and I couldn't find an intermediate layer crate that abstracted over the various calls needed. As I don't have arm/mips, if you wanted to put a patch forward I'd be happy to merge it.