aarch64: can't find crate for proc_macro` when compiling proc-macro2
#266
Comments
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after some testing it's clear that I'm able to find it on my host standalone cargo toolchain install for the same target. I dont know why meta-rust when setting up the toolchain is not generating this file. |
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I've been looking at this layer lately, and ran across a similar problem. The quickest, but maybe not most correct fix is to change meta-rust/recipes-devtools/rust/libstd-rs.inc: from: to: Building libtest will actually build both libtest and libstd, and also includes libproc_macro. |
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I'm hitting this with a few commits back on master libstd-rs is only building native version of proc_macro Can anyone suggest another workaround? |
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I'm encountering this issue while building a Rust project for aarch64. The project is based on the Rocket web server, v0.5-rc. I had no problems until I added the crate I'm currently using meta-rust 448047c. |
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Now that rust support is in OE core I need to test with updated branch. I suspect the issue is still there. |
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I'm comparing my Yocto The local rustup dir has these that are not in the Yocto poky dir:
Why are these ones in the rustup dir but not in the Yocto poky dir? |
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I suspect the build breaks at the missing libproc_macro, and never gets to the others. If you look at the source proc_macro has it's own directory, and is the exception. In my case what's odd is that it's attempting to link a cross compiled libproc_macro. Libproc_macro should only ever be host. |
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Did you try setting LD_LIBRARY RUNTIME to path in sysroot-native that has proc_macro? Given proc_macros are only built/run on host, LD_LIBRARY_RUNTIME can be used to augment paths from sysroot-native. |
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@jwinarske wrote:
and also
I don't think this is correct. For non-Yocto builds, I installed the I tested this:
So, I think your hypothesis is incorrect, and the Yocto |
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@cmcqueen What's the machine architecture of libproc_macro-3f1222cb41e97635.rlib? |
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@cmcqueen Is this a public project you can share? |
No, it's private for my employer. But, I'll see if I can make a "Minimal Reproducible Example" (MRE). |
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Here's a minimal example:
I think it's the |
-S = "${RUSTSRC}/library/std"
+S = "${RUSTSRC}/library/test"That can be done in a |
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@cmcqueen You example builds fine on desktop for host (x86_64), but fails cross compiling on Desktop for aarch64. I would suggest that needs to be addressed prior to attempting to build for Yocto... When I reported changing S not having an impact was with 1.45, and in my case the problem was addressing runtime dependency problems (CXX binding nonsense). |
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@jwinarske I didn't encounter |
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Sorry, I'm at a loss to explain the |
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To cross-compile You also need to create a file |
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@jwinarske have you been able to investigate this further? With my previous comment, you should be able to manually cross-compile for the aarch64 target, I think. |
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@cmcqueen not yet. I've been working around it via Yocto SDK and Rust cross Canadian toolchain. I will be looking at this in ~three weeks. |
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@cmcqueen I took a look at this today. Using bbappend fixes the issue.
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Have this been fixed? |
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@otavio The only way to work around this is to add listed-rs_%.bbappend as I indicate above. This should get an official fix, as this is a work around. |
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@otavio Still present in poky at current master 44bb88cc869f3b42440d6f7aad000e706b739a2b building for raspberrypi4-64; overriding libstd-rs as described in #266 (comment) still fixes it. rust-lang/rustc-dev-guide#1389 seems to identify the root cause of the problem, and changing |
Building libstd-rs from library/std omits proc_macro from the sysroot. Using library/test causes that to be installed which then allows cargo to build (meta-rust#266) Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Building libstd-rs from library/std omits proc_macro from the sysroot. Using library/test causes that to be installed which then allows cargo to build (meta-rust/meta-rust#266) (From OE-Core rev: 62527d5dadb79c70731e1dfd7b1f71495c78b267) Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Building libstd-rs from library/std omits proc_macro from the sysroot. Using library/test causes that to be installed which then allows cargo to build (meta-rust/meta-rust#266) Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Building libstd-rs from library/std omits proc_macro from the sysroot. Using library/test causes that to be installed which then allows cargo to build (meta-rust/meta-rust#266) Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Building libstd-rs from library/std omits proc_macro from the sysroot. Using library/test causes that to be installed which then allows cargo to build (meta-rust#266) Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Building libstd-rs from library/std omits proc_macro from the sysroot. Using library/test causes that to be installed which then allows cargo to build (meta-rust/meta-rust#266) Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Is it just me, or does 1.71+ break the accepted workaround for this issue? |
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Same problem with 1.72. Changing removing panic-unwind and backtrace features shows different errors |
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Is there any fix for this issue on 1.72? |
-removes workaround for `can't find crate for proc_macro` when compiling proc-macro2` -meta-rust/meta-rust#266 -#370 Signed-off-by: Joel Winarske <joel.winarske@gmail.com>
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To everyone still stuck with this, or those who come here from a search result, an answer has been posted in #425 (comment) |
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@jaskij What versions have you tested that with? Also not sure if this repo is used verbatim in Yocto. |
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That said I only use this repo for dunfell |
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@jwinarske 1.75, kirkstone, but I'm doing x86-64 -> x86-64 so there may be some host contamination that slipped by. So far the only thing I have confirmed is a successful build. |
Building libstd-rs from library/std omits proc_macro from the sysroot. Using library/test causes that to be installed which then allows cargo to build (meta-rust/meta-rust#266) Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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the recommended fix in this thread is broken in 1.78.0 causing the error:
the fix can be adjusted with modification per this issue: -S = "${RUSTSRC}/library/test"
+S = "${RUSTSRC}/library/sysroot" |
Version(s) of meta-rust
Master (d0dc19a)
Version(s) of poky and/or oe-core
poky: (Sep 8 2019) 6d2e12e79211b31cdf5ea824fb9a8be54ba9a9eb
Expected result
Using cargo only im able to successfully cross-compile and run my code on the target
aarch64-unknown-linux-gnu.Using Yocto and meta-rust the build fails with
error[E0463]: can't find crate forproc_macro`` when compiling proc-macro2.any idea ?
thank you
Actual result
Steps to reproduce
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