Tested x86_64-pc-linux-gnu, applying to trunk.

-- 8< --

Looks like I've forgotten to update the docs for -fabi-version for a couple
of my changes.

gcc/ChangeLog:

        * doc/invoke.texi: Add -fabi-version detail.
        * common.opt: Likewise.
---
 gcc/doc/invoke.texi | 9 +++++++--
 gcc/common.opt      | 2 +-
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index d1925c98c2f..e7a9a03bace 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -3006,12 +3006,17 @@ in C++14 and up.
 Version 18, which first appeared in G++ 13, fixes manglings of lambdas
 that have additional context.
 
-Version 19, which first appeared in G++ 14, fixes manglings of structured
-bindings to include ABI tags.
+Version 19, which first appeared in G++ 14, fixes manglings of
+structured bindings to include ABI tags, handling of cv-qualified
+[[no_unique_address]] members, and adds mangling of C++20 constraints
+on function templates.
 
 Version 20, which first appeared in G++ 15, fixes manglings of lambdas
 in static data member initializers.
 
+Version 21, which first appeared in G++ 16, fixes unnecessary captures
+in noexcept lambdas (c++/119764).
+
 See also @option{-Wabi}.
 
 @opindex fabi-compat-version
diff --git a/gcc/common.opt b/gcc/common.opt
index 3edc5907ec8..8a5b69d0767 100644
--- a/gcc/common.opt
+++ b/gcc/common.opt
@@ -1055,7 +1055,7 @@ Driver Undocumented
 ; 20: Fix mangling of lambdas in static data member initializers.
 ;     Default in G++ 15.
 ;
-; 21:
+; 21: Fix noexcept lambda capture pruning.
 ;     Default in G++ 16.
 ;
 ; Additional positive integers will be assigned as new versions of

base-commit: b6d37ec1dd2a228d94e7b5b438f3aa53684316bc
-- 
2.49.0

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