49 lines
1.4 KiB
Bash
49 lines
1.4 KiB
Bash
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#!/bin/sh -e
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rust_triplet() {
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# Find the triplets in Alpine's rust APKBUILD or with:
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# pmbootstrap chroot -barmhf --add=rust -- ls /usr/lib/rustlib
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case "$1" in
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x86_64)
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echo "x86_64-alpine-linux-musl"
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;;
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armhf)
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echo "arm-unknown-linux-musleabihf"
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;;
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armv7)
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echo "armv7-unknown-linux-musleabihf"
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;;
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aarch64)
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echo "aarch64-unknown-linux-musl"
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;;
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*)
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echo "ERROR: don't know the rust triple for $1!" >&2
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exit 1
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;;
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esac
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}
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arch="@ARCH@" # filled in by APKBUILD
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if ! LD_LIBRARY_PATH=/native/lib:/native/usr/lib \
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/native/usr/bin/rustc \
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-Clinker=/native/usr/lib/crossdirect/rust-qemu-linker \
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--target=$(rust_triplet "$arch") \
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--sysroot=/usr \
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"$@"; then
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echo "---" >&2
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echo "WARNING: crossdirect: cross compiling with rustc failed, trying"\
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"again with rustc + qemu" >&2
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echo "---" >&2
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# Usually the crossdirect approach works; however, when passing
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# --extern to rustc with a dynamic library (.so), it fails with an
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# error like 'can't find crate for `serde_derive`' (although the crate
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# does exist). I think it fails to parse the metadata of the so file
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# for some reason. We probably need to adjust rustc's
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# librustc_metadata/locator.rs or something (and upstream that
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# change!), but I've spent enough time on this already. Let's simply
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# fall back to compiling in qemu in the very few cases where this is
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# necessary.
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/usr/bin/rustc "$@"
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fi
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