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28 lines
1.0 KiB
Diff
28 lines
1.0 KiB
Diff
From cb5b4585486a52d06315a800f9e4ed96f2677898 Mon Sep 17 00:00:00 2001
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From: Mike Hommey <mh+mozilla@glandium.org>
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Date: Mon, 20 Jul 2020 16:05:36 +0000
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Subject: [PATCH] Bug 1640982 - Set CARGO_PROFILE_RELEASE_LTO=true when
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enabling rust LTO. r=firefox-build-system-reviewers,rstewart
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Differential Revision: https://phabricator.services.mozilla.com/D84098
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---
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config/makefiles/rust.mk | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/config/makefiles/rust.mk b/config/makefiles/rust.mk
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index 82182ffdf30fe..4b4a679593377 100644
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--- a/config/makefiles/rust.mk
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+++ b/config/makefiles/rust.mk
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@@ -61,7 +61,11 @@ ifndef MOZ_DEBUG_RUST
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# Enable link-time optimization for release builds, but not when linking
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# gkrust_gtest.
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ifeq (,$(findstring gkrust_gtest,$(RUST_LIBRARY_FILE)))
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+# Pass -Clto for older versions of rust, and CARGO_PROFILE_RELEASE_LTO=true
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+# for newer ones that support it. Combining the latter with -Clto works, so
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+# set both everywhere.
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cargo_rustc_flags += -Clto
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+export CARGO_PROFILE_RELEASE_LTO=true
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endif
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endif
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endif
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