From b524c6277fd8f6826a97e5b83d397e03ae9c949f Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikita.ppv@gmail.com>
Date: Sun, 26 Mar 2023 23:52:59 +0200
Subject: [PATCH] Limit to one job on mingw builders

This is another attempt to work around
https://github.com/rust-lang/rust/issues/108227.

By limiting to one link job, we should be able to avoid file name
clashes in mkstemp().
---
 src/ci/run.sh | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/ci/run.sh b/src/ci/run.sh
index 93dccb54c4e3..efeb850cd8b9 100755
--- a/src/ci/run.sh
+++ b/src/ci/run.sh
@@ -59,6 +59,14 @@ RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --enable-locked-deps"
 RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --enable-cargo-native-static"
 RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --set rust.codegen-units-std=1"
 
+# When building for mingw, limit the number of parallel linker jobs during
+# the LLVM build, as not to run out of memory.
+# This is an attempt to fix the spurious build error tracked by
+# https://github.com/rust-lang/rust/issues/108227.
+if isWindows && [[ ${CUSTOM_MINGW-0} -eq 1 ]]; then
+    RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --set llvm.link-jobs=1"
+fi
+
 # Only produce xz tarballs on CI. gz tarballs will be generated by the release
 # process by recompressing the existing xz ones. This decreases the storage
 # space required for CI artifacts.