I'm cross compiling from linux to windows, but I found it not work.
I checked the history issue and found that the problem is still unresolved.
However, in the course of my continuous testing, I found that the cfg conditional judgment in the build script does not work.
My Test Demo
// build.rs
#[cfg(target_os="windows")]
fn main() {
panic!("target_os = windows")
}
#[cfg(windows)]
fn main() {
panic!("windows")
}
#[cfg(unix)]
fn main() {
panic!("unix")
}host system
$ uname -a
Linux alex 5.13.19-2-MANJARO #1 SMP PREEMPT Sun Sep 19 21:31:53 UTC 2021 x86_64 GNU/Linux
target: x86_64-unknown-linux-gnu (local)
$ cargo build
Compiling target v0.1.0 (/data/projects/target)
error: failed to run custom build command for `target v0.1.0 (/data/projects/target)`
Caused by:
process didn't exit successfully: `/data/projects/target/target/debug/build/target-fff5ba352ad7afdb/build-script-build` (exit status: 101)
--- stderr
thread 'main' panicked at 'unix', build.rs:13:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
That's fine, however when cross compile...
target: x86_64-pc-windows-gnu (cross compile)
$ cargo build --target x86_64-pc-windows-gnu
Compiling target v0.1.0 (/data/projects/target)
error: failed to run custom build command for `target v0.1.0 (/data/projects/target)`
Caused by:
process didn't exit successfully: `/data/projects/target/target/debug/build/target-fff5ba352ad7afdb/build-script-build` (exit status: 101)
--- stderr
thread 'main' panicked at 'unix', build.rs:13:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
I expect it to output window or target_os = windows, but it panic at unix
My solution
I think it may be because some features were not determined when build.rs was compiled and the features not been passed to rustc.
I have found some environment variables from the documentation and they can be used to determine target and host.
use std::env;
fn main() {
if env::var("PROFILE").unwrap() == "release" {
if let Ok(_) = env::var("CARGO_CFG_WINDOWS") {
let mut res = winres::WindowsResource::new();
if let Ok(host) = env::var("HOST") {
if host.contains("linux") {
res.set_toolkit_path("/usr/bin")
.set_windres_path("x86_64-w64-mingw32-windres");
}
}
res.set_icon("res/copy-translator.ico").set_language(0x04);
res.compile().unwrap();
}
}
}
Icons are still not set successfully when cross compile fron linux to windows
I'm cross compiling from linux to windows, but I found it not work.
I checked the history issue and found that the problem is still unresolved.
However, in the course of my continuous testing, I found that the
cfgconditional judgment in the build script does not work.My Test Demo
host system
$ uname -a Linux alex 5.13.19-2-MANJARO #1 SMP PREEMPT Sun Sep 19 21:31:53 UTC 2021 x86_64 GNU/Linuxtarget: x86_64-unknown-linux-gnu (local)
That's fine, however when cross compile...
target: x86_64-pc-windows-gnu (cross compile)
I expect it to output
windowortarget_os = windows, but it panic atunixMy solution
I think it may be because some features were not determined when
build.rswas compiled and the features not been passed to rustc.I have found some environment variables from the documentation and they can be used to determine target and host.