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-rw-r--r--profiles/base/use.mask8
1 files changed, 8 insertions, 0 deletions
diff --git a/profiles/base/use.mask b/profiles/base/use.mask
index eee41ca8c6f8..c6a22bb1577f 100644
--- a/profiles/base/use.mask
+++ b/profiles/base/use.mask
@@ -4,6 +4,14 @@
# This file is only for generic masks. For arch-specific masks (i.e.
# mask everywhere, unmask on arch/*) use arch/base.
+# Sam James <sam@gentoo.org> (2022-01-12)
+# PCH has proven itself to be unreliable and lead to spurious build
+# failures. Masking so users aren't exposed to such failures without opting-in.
+# Failures aren't always reproducible and implementations are often fragile.
+# Please speak to <toolchain@gentoo.org> and/or <qa@gentoo.org> before dropping.
+# See e.g. bug #753323, bug #822690.
+pch
+
# Hans de Graaff <graaff@gentoo.org> (2021-07-09)
# Mask Ruby 2.5 as EOL
ruby_targets_ruby25