Re: Okay, how much ram does it take to build Rust?

Hi,

My poudriere builds rust on a Raspberry PI with 8 GB RAM which is doing all kinds of other stuff like running Jenkins in the meantime. So I doubt your RAM is the issue.

I once helped somebody with out-of-memory problems and that person had set MAX_MEMORY in poudriere.conf to a really low value for testing purposes and than forgot about it.

What would help is if you post a link to the full build log as at the start of the log it prints all kinds of information about your memory settings.

Regards,
Ronald.



 
Van: "Dan Mahoney (Ports)" <[email protected]>
Datum: donderdag, 11 september 2025 09:42
Aan: FreeBSD Mailing List <[email protected]>
Onderwerp: Okay, how much ram does it take to build Rust?
> 
> Hey there folks,
> 
> I've got poudriere running on a recently-16-ified VM with 8 cores and 48G ram (up from 32), and to eat the dogfood I'm attempting to build all my own packages.
> 
> lang/rust is a big one.  It pontificates for about two hours, then dies with:
> 
> [ 45% 1690/3710] Building RISCVGenExegesis.inc...
> [ 45% 1691/3710] Building RISCVGenGlobalISel.inc...
> FAILED: [code=262] lib/Target/RISCV/RISCVGenGlobalISel.inc /wrkdirs/usr/ports/lang/rust/work/_build/x86_64-unknown-freebsd/llvm/build/lib/Target/RISCV/RISCVGenGlobalISel.inc
> cd /wrkdirs/usr/ports/lang/rust/work/_build/x86_64-unknown-freebsd/llvm/build && /wrkdirs/usr/ports/lang/rust/work/_build/x86_64-unknown-freebsd/llvm/build/bin/llvm-tblgen -gen-global-isel -I /wrkdirs/usr/ports/lang/rust/work/rustc-1.89.0-src/src/llvm-project/llvm/lib/Target/RISCV -I/wrkdirs/usr/ports/lang/rust/work/_build/x86_64-unknown-freebsd/llvm/build/include -I/wrkdirs/usr/ports/lang/rust/work/rustc-1.89.0-src/src/llvm-project/llvm/include -I /wrkdirs/usr/ports/lang/rust/work/rustc-1.89.0-src/src/llvm-project/llvm/lib/Target -no-warn-on-unused-template-args /wrkdirs/usr/ports/lang/rust/work/rustc-1.89.0-src/src/llvm-project/llvm/lib/Target/RISCV/RISCVGISel.td --write-if-changed -o lib/Target/RISCV/RISCVGenGlobalISel.inc -d lib/Target/RISCV/RISCVGenGlobalISel.inc.d
> LLVM ERROR: out of memory
> Allocation failed
> PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
> Stack dump:
> 0. Program arguments: /wrkdirs/usr/ports/lang/rust/work/_build/x86_64-unknown-freebsd/llvm/build/bin/llvm-tblgen -gen-global-isel -I /wrkdirs/usr/ports/lang/rust/work/rustc-1.89.0-src/src/llvm-project/llvm/lib/Target/RISCV -I/wrkdirs/usr/ports/lang/rust/work/_build/x86_64-unknown-freebsd/llvm/build/include -I/wrkdirs/usr/ports/lang/rust/work/rustc-1.89.0-src/src/llvm-project/llvm/include -I /wrkdirs/usr/ports/lang/rust/work/rustc-1.89.0-src/src/llvm-project/llvm/lib/Target -no-warn-on-unused-template-args /wrkdirs/usr/ports/lang/rust/work/rustc-1.89.0-src/src/llvm-project/llvm/lib/Target/RISCV/RISCVGISel.td --write-if-changed -o lib/Target/RISCV/RISCVGenGlobalISel.inc -d lib/Target/RISCV/RISCVGenGlobalISel.inc.d
> ninja: build stopped: subcommand failed.
> 
> thread 'main' panicked at /wrkdirs/usr/ports/lang/rust/work/rustc-1.89.0-src/vendor/cmake-0.1.54/src/lib.rs:1119:5:
> 
> command did not execute successfully, got: exit status: 6
> 
> build script failed, must exit now
> stack backtrace:
>    0: __rustc::rust_begin_unwind
>    1: core::panicking::panic_fmt
>    2: cmake::fail
> 
> Full logs here:
> 
> https://poudriere-src.isc.org/data/freebsd:16:x86:64-pkgbase-default_git/2025-09-11_04h17m42s/logs/rust-1.89.0.log
> 
> Is this actually likely an LLVM bug, or is 48G of ram not enough (it barely climbed at all for most of the files).  Note that I'm not doing anything multi-threaded with Poudriere, this is single CPU bound.
> 
> -Dan
> 
> 
>