如何为 x86_64-unknown-linux-musl 构建依赖于 curl 的可执行文件

Question

我在 amd64 Debian 机器上，正在尝试构建 x86_64-unknown-linux-musl 可执行文件。我的 Cargo.toml 中有这个：

[dependencies]
curl = "0.4"

当我跑步时，cargo build --target=x86_64-unknown-linux-musl我得到了这个：

[dependencies]
curl = "0.4"

当我重新运行它时：

error: failed to run custom build command for `libz-sys v1.0.10`
process didn't exit successfully: `/tmp/foo/target/debug/build/libz-sys-c20da5f29c41e515/build-script-build` (exit code: 101)
--- stdout
OPT_LEVEL = Some("0")
PROFILE = Some("debug")
TARGET = Some("x86_64-unknown-linux-musl")
debug=true opt-level=0
HOST = Some("x86_64-unknown-linux-gnu")
TARGET = Some("x86_64-unknown-linux-musl")
TARGET = Some("x86_64-unknown-linux-musl")
HOST = Some("x86_64-unknown-linux-gnu")
CC_x86_64-unknown-linux-musl = None
CC_x86_64_unknown_linux_musl = None
TARGET_CC = None
CC = None
HOST = Some("x86_64-unknown-linux-gnu")
CROSS_COMPILE = None
TARGET = Some("x86_64-unknown-linux-musl")
HOST = Some("x86_64-unknown-linux-gnu")
CFLAGS_x86_64-unknown-linux-musl = None
CFLAGS_x86_64_unknown_linux_musl = None
TARGET_CFLAGS = None
CFLAGS = None
running: "./configure" "--prefix=/tmp/foo/target/x86_64-unknown-linux-musl/debug/build/libz-sys-e109627694e9981e/out"
Compiler error reporting is too harsh for ./configure (perhaps remove -Werror).
** ./configure aborting.

--- stderr
thread 'main' panicked at 'failed to run successfully: exit code: 1', /home/tshepang/.cargo/registry/src/github.com-1ecc6299db9ec823/libz-sys-1.0.10/build.rs:189

当我本地构建时一切正常，即cargo build --target=x86_64-unknown-linux-gnu.

四处寻找，我了解到一个环境变量，PKG_CONFIG_ALLOW_CROSS：

PKG_CONFIG_ALLOW_CROSS=true cargo build --target=x86_64-unknown-linux-musl

在这样做时，我还发现我缺少名为libcurl4-openssl-dev的 Debian 软件包。

运行ldd target/target/x86_64-unknown-linux-musl/debug/foo 表明可执行文件是动态链接的，然后进一步搜索，我了解到另一个环境变量 PKG_CONFIG_ALL_STATIC：

PKG_CONFIG_ALL_STATIC=true PKG_CONFIG_ALLOW_CROSS=true cargo build --target=x86_64-unknown-linux-musl

这揭示了一大堆缺失的 deps，所有这些（幸运的是）都依赖于 Debian。但是安装所有这些都无济于事，因为最后，我仍然坐在一个非静态链接的可执行文件上。

Answer 1

我屈服了，最终使用了cross：

cargo install cross
cross build --target=x86_64-unknown-linux-musl

这太简单了，您将在target/x86_64-unknown-linux-musl/debug.