Support custom CC/CXX args about cargo-zigbuild HOT 9 CLOSED

I guess it's only needed when linking frameworks?

from cargo-zigbuild.

Not just frameworks, but also bundled libraries (like openssl). This isn't required for projects that are fully Rust, but for anything more involved, it may be necessary,

from cargo-zigbuild.

Does CFLAGS/CXXFLAGS/LDFLAGS or RUSTFLAGS supports setting --sysroot ?

from cargo-zigbuild.

Alternative we can add support to download a MacOS SDK automatically and set up --sysroot properly.

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I think I can set --sysroot with CFLAGS, I'll try it out now.

Regarding the SDK, I'm not sure we can rely on that reposity to last forever without Apple DMCAing it. They allowed to download the SDKs (as part of Command Line Tools for Xcode) freely before, but now you need to be authenticated now to download e.g. https://download.developer.apple.com/Developer_Tools/Command_Line_Tools_for_Xcode_13.3/Command_Line_Tools_for_Xcode_13.3.dmg.
I imagine it would be quite a hassle to automate and maintain this feature...

from cargo-zigbuild.

If we need to add --sysroot support, I think we can read it from the SDKROOT environment variable, CMake also does this:

If not set explicitly the value is initialized by the SDKROOT environment variable, if set

https://cmake.org/cmake/help/latest/variable/CMAKE_OSX_SYSROOT.html

from cargo-zigbuild.

I tried setting CFLAGS/CXXFLAGS/LDFLAGS all to --sysroot=${SDKROOT} -I${SDKROOT}/usr/include -L${SDKROOT}/usr/lib -F${SDKROOT}/System/Library/Frameworks but it didn't work with cargo zigbuild (tried without the env as well).

I managed to compile without setting sysroot in the linker script with just: ~/.cargo/bin/cargo-zigbuild zig cc -- -target aarch64-macos -I${SDKROOT}/usr/include -L${SDKROOT}/usr/lib -F${SDKROOT}/System/Library/Frameworks -g $@ so I guess it's more of an include/library/framework lookup issue.

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Can you try #20 ?

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Hey, thanks for the swift implementation!

I tried it out and can confirm it works for sufficiently new versions of zig (at least 0.9.1 ziglang/zig#10568, https://ziglang.org/download/0.9.1/release-notes.html#zig-cc--zig-c)
Doesn't work for 0.9.0 (the current version on arch), but I guess that's shouldn't be this project's problem.

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