如何使用Raspian/Debian在ARMv7上为musl创建静态链接的Rust程序？

Question

我正在尝试使用Cargo中的armv7-unknown-linux-musleabihf目标在ARMv7 (Raspian/Debian)上创建一个静态链接版本的Rust程序。依赖项backtrace-sys v0.1.28的构建失败，

error: failed to run custom build command for `backtrace-sys v0.1.28`
process didn't exit successfully: `/home/pi/develop/balena.io/migrate/target/debug/build/backtrace-sys-7330a27c773191d1/build-script-build` (exit code: 101)
--- stdout
cargo:rustc-cfg=rbt
TARGET = Some("armv7-unknown-linux-musleabihf")
OPT_LEVEL = Some("0")
HOST = Some("armv7-unknown-linux-gnueabihf")
CC_armv7-unknown-linux-musleabihf = None
CC_armv7_unknown_linux_musleabihf = None
TARGET_CC = None
CC = None
CROSS_COMPILE = None
CFLAGS_armv7-unknown-linux-musleabihf = None
CFLAGS_armv7_unknown_linux_musleabihf = None
TARGET_CFLAGS = None
CFLAGS = None
CRATE_CC_NO_DEFAULTS = None
CARGO_CFG_TARGET_FEATURE = Some("crt-static")
running: "arm-linux-musleabihf-gcc" "-O0" "-ffunction-sections" "-fdata-sections" "-fPIC" "-static" "-march=armv7-a" "-I" "src/libbacktrace" "-I" "/home/pi/develop/balena.io/migrate/target/armv7-unknown-linux-musleabihf/debug/build/backtrace-sys-87487ee93f4ac0ac/out" "-fvisibility=hidden" "-DBACKTRACE_ELF_SIZE=32" "-DBACKTRACE_SUPPORTED=1" "-DBACKTRACE_USES_MALLOC=1" "-DBACKTRACE_SUPPORTS_THREADS=0" "-DBACKTRACE_SUPPORTS_DATA=0" "-DHAVE_DL_ITERATE_PHDR=1" "-D_GNU_SOURCE=1" "-D_LARGE_FILES=1" "-Dbacktrace_full=__rbt_backtrace_full" "-Dbacktrace_dwarf_add=__rbt_backtrace_dwarf_add" "-Dbacktrace_initialize=__rbt_backtrace_initialize" "-Dbacktrace_pcinfo=__rbt_backtrace_pcinfo" "-Dbacktrace_syminfo=__rbt_backtrace_syminfo" "-Dbacktrace_get_view=__rbt_backtrace_get_view" "-Dbacktrace_release_view=__rbt_backtrace_release_view" "-Dbacktrace_alloc=__rbt_backtrace_alloc" "-Dbacktrace_free=__rbt_backtrace_free" "-Dbacktrace_vector_finish=__rbt_backtrace_vector_finish" "-Dbacktrace_vector_grow=__rbt_backtrace_vector_grow" "-Dbacktrace_vector_release=__rbt_backtrace_vector_release" "-Dbacktrace_close=__rbt_backtrace_close" "-Dbacktrace_open=__rbt_backtrace_open" "-Dbacktrace_print=__rbt_backtrace_print" "-Dbacktrace_simple=__rbt_backtrace_simple" "-Dbacktrace_qsort=__rbt_backtrace_qsort" "-Dbacktrace_create_state=__rbt_backtrace_create_state" "-Dbacktrace_uncompress_zdebug=__rbt_backtrace_uncompress_zdebug" "-o" "/home/pi/develop/balena.io/migrate/target/armv7-unknown-linux-musleabihf/debug/build/backtrace-sys-87487ee93f4ac0ac/out/src/libbacktrace/alloc.o" "-c" "src/libbacktrace/alloc.c"

--- stderr
thread 'main' panicked at '

我在Ubuntu Linux x86_64上尝试了这种交叉编译，但在Raspian上也进行了本机编译，也得到了相同的结果。

看起来安装缺少一个编译器，但我不知道如何安装和提供它。

Answer 1

在原生平台上，安装musl-dev和musl-tools包并调用Cargo，如下所示，从而成功构建：

CC=/usr/bin/musl-gcc cargo build --target=armv7-unknown-linux-musleabihf