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Support iOS 13 in cross #93596

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merged 7 commits into from Sep 11, 2020
Merged

Support iOS 13 in cross #93596

merged 7 commits into from Sep 11, 2020

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matthewbauer
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Motivation for this change
Things done
  • Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
  • Built on platform(s)
    • NixOS
    • macOS
    • other Linux distributions
  • Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
  • Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
  • Tested execution of all binary files (usually in ./result/bin/)
  • Determined the impact on package closure size (by running nix path-info -S before and after)
  • Ensured that relevant documentation is up to date
  • Fits CONTRIBUTING.md.

@matthewbauer matthewbauer changed the base branch from master to staging July 21, 2020 19:32
@matthewbauer matthewbauer force-pushed the ios-13 branch 2 times, most recently from 511f5d3 to 7f4d3f4 Compare July 22, 2020 16:56
Ericson2314
Ericson2314 reviewed Jul 22, 2020
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pkgs/os-specific/darwin/xcode/sdk-pkgs.nix Outdated
'' + stdenv.lib.optionalString (sdk.platform == "iPhoneOS") ''
echo "-miphoneos-version-min=${minSdkVersion}" >> $out/nix-support/cc-cflags
echo "-Wl,-platform_version,ios,${targetPlatform.minSdkVersion or "9.0"},${sdk.version}" >> $out/nix-support/cc-cflags
'';
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Maybe we should move these to the binutils override above

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Yeah - that avoids the warning

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I think the c compiler should know about minSdkVersion, so I readded miphoneos-version-min.

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Weird it knows about it, but can't also send it to the linker, ugh.

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It sends the min sdk version to the linker, but not the sdk version. It looks like this might fix that:

https://reviews.llvm.org/D71579

@matthewbauer matthewbauer force-pushed the ios-13 branch 2 times, most recently from dac26f5 to 3c830bc Compare July 23, 2020 03:15
@matthewbauer
xcode/sdk-pkgs.nix: set -platform_version in addition to -miphoneos-v…
95eabdf 
…ersion-min

The App Store looks at LC_VERSION_MIN_IPHONEOS to verify you have a
new enough SDK version. This is not just the minimum version, but also
the sdk version used. When the linker can’t figure it out, it tries to
infer it from the sdk path[1]. When no sdk version is found, it
defaults to just using the -miphoneos-version-min value[2]. So, to make
sure we don’t rely on inference (which doesn’t work in the current
directory structure), we have to specify -platform_version.

[1]:
https://github.com/tpoechtrager/cctools-port/blob/43f32a4c61b5ba7fde011e816136c550b1b3146f/cctools/ld64/src/ld/Options.cpp#L5355-L5376
[2]: https://github.com/tpoechtrager/cctools-port/blob/43f32a4c61b5ba7fde011e816136c550b1b3146f/cctools/ld64/src/ld/ld.hpp#L58
@matthewbauer matthewbauer mentioned this pull request Jul 30, 2020
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@matthewbauer matthewbauer merged commit 9112a9d into NixOS:staging Sep 11, 2020
@thefloweringash
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thefloweringash commented Sep 19, 2020 •
edited

The cctools bump seems to have added a warning on linking:

$ nix-shell ~/src/nixpkgs-staging -A hello --run 'clang -v -x c -o /dev/null /dev/null'  2>&1 | grep warning
ld: warning: passed two min versions (10.12.0, 10.12) for platform macOS. Using 10.12.

This warning seems harmless enough, but ruby's configure script treats this as a problem with LDFLAGS.

$ nix-build -A ruby
[...]
checking whether LDFLAGS is valid... no
configure: error: something wrong with LDFLAGS=""
builder for '/nix/store/2b4wc2navpjw3hm4aijyhsqrfc3yzav9-ruby-2.6.6.drv' failed with exit code 1

As pointed out in the thread above, clang adds version args when calling the linker, which duplicates the flags set in ${darwin.binutils}/nix-support/libc-ldflags-before and causes the warning.

Just as a test, reverting 3c6bd61 is sufficient to build ruby.

@zowoq zowoq mentioned this pull request Oct 24, 2020
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@thefloweringash thefloweringash mentioned this pull request Feb 5, 2021
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@nbp nbp Awaiting requested review from nbp

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