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Improve cross compiling support #158

Merged
merged 3 commits into from
Oct 28, 2022
Merged

Improve cross compiling support #158

merged 3 commits into from
Oct 28, 2022

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messense
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@messense messense commented Jul 26, 2022 •
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This PR changes cmake-rs to fill out CMAKE_SYSTEM_NAME and CMAKE_SYSTEM_PROCESSOR based CARGO_CFG_TARGET_OS and CARGO_CFG_TARGET_ARCH when cross compiling while CMAKE_TOOLCHAIN_FILE and CMAKE_SYSTEM_NAME isn't set by user.

It's tested on CI using cross.

Closes #75
Closes #80
Closes #151

@messense messense marked this pull request as ready for review July 26, 2022 12:10
@messense messense mentioned this pull request Jul 26, 2022
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messense
messense commented Jul 26, 2022
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src/lib.rs Outdated
}
} else if target.contains("solaris") {
if !self.defined("CMAKE_SYSTEM_NAME") {
self.define("CMAKE_SYSTEM_NAME", "SunOS");
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@messense messense Jul 26, 2022 •
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We can also address #151 by removing this if it's desirable.

cc @gco

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Yes, please!

This was referenced Jul 27, 2022
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@thomwiggers thomwiggers mentioned this pull request Aug 18, 2022
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@messense messense mentioned this pull request Aug 30, 2022
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@messense messense mentioned this pull request Sep 14, 2022
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This looks great. Thanks for improving the CI too.

@thomcc thomcc merged commit cfe11fc into rust-lang:master Oct 28, 2022
@pnkfelix pnkfelix mentioned this pull request Nov 11, 2022
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@sburton84 sburton84 mentioned this pull request Nov 29, 2022
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@messense messense mentioned this pull request Dec 13, 2022
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@luser luser mentioned this pull request Jan 27, 2023
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luser added a commit to luser/cmake-rs that referenced this pull request Jan 27, 2023
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Revert rust-lang#110 to fix iOS cross-compilation after rust-lang#158. …
f658691 
…Fixes rust-lang#173

In rust-lang#158, better support for using CMake's cross-compilation facilities was
added. This made the workaround added in rust-lang#110 for iOS not only unnecessary,
but actively harmful, in that it runs afoul of SDK validation checks in the
CMake iOS codepath.
@luser luser mentioned this pull request Jan 27, 2023
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thomcc added a commit that referenced this pull request Mar 23, 2023
@luser @thomcc @JohnTitor
Revert #110 to fix iOS cross-compilation after #158. Fixes #173 (#176)
9e1614b 
* add an iOS cross-compile test to CI

* Fix zlib-ng compilation for iOS

* Revert #110 to fix iOS cross-compilation after #158. Fixes #173

In #158, better support for using CMake's cross-compilation facilities was
added. This made the workaround added in #110 for iOS not only unnecessary,
but actively harmful, in that it runs afoul of SDK validation checks in the
CMake iOS codepath.

* Use checkout@v3

Co-authored-by: Yuki Okushi <[email protected]>

---------

Co-authored-by: Thom Chiovoloni <[email protected]>
Co-authored-by: Yuki Okushi <[email protected]>
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jrose-signal commented May 11, 2023 •
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I'm afraid this broke no-toolchain cross-compilation using Visual Studio, from an x86_64 Windows host to aarch64-pc-windows-msvc. Things are a bit clunky there in general (the existing support goes through platforms and does not set CMAKE_SYSTEM_PROCESSOR), but it was working in 1.48.0 (and I'm afraid we hadn't been testing with new crate versions, so we didn't discover this sooner).

(Specifically, the auto-search for CMAKE_C_COMPILER and CMAKE_CXX_COMPILER doesn't kick in, even though it works fine for a non-cross-compile MSVS generator build.)

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Workaround: set CMAKE_SYSTEM_NAME to an empty string, which counts as defined for this crate, but unset for CMake itself.

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jrose-signal commented May 31, 2023 •
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Turns out this also broke cross-compiling to Mac Catalyst targets (*-apple-ios-macabi), because CMake doesn't like having CMAKE_SYSTEM_NAME set to "iOS" while compiling against a macOS sysroot. That should probably eventually be fixed in CMake itself, but for now setting CMAKE_SYSTEM_NAME back to "Darwin" does work, at least for simple libraries. I don't know if you want to put that in this crate, though.

EDIT (months later): here's CMake not deciding what to do about Catalyst, which isn't cmake-rs's fault.

@jrose-signal jrose-signal mentioned this pull request Jun 29, 2023
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@jrose-signal jrose-signal mentioned this pull request Nov 13, 2023
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