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| author | Nathan Sidwell <nathan@acm.org> | 2022-10-10 17:55:04 -0400 |
|---|---|---|
| committer | Nathan Sidwell <nathan@acm.org> | 2022-10-10 18:13:47 -0400 |
| commit | c7cb239f51788dbe3148368942b208934707b6a7 (patch) | |
| tree | 5623c918585a6fb4aa69910b91dc982d2100933d /gcc/common.opt | |
| parent | 29b0fe393859729215b0db5d28f2faea30c6ec32 (diff) | |
| download | gcc-c7cb239f51788dbe3148368942b208934707b6a7.tar.gz | |
c++: Lambda context mangling
VAR and FIELD decls can become part of a lambda context, when the
lambda is 'attached' to that entity (It's a C++20 ODR thing that was
discovered with modules, but is actually separate.) We were not
marking those decls as substitution candidates, leading to demangling
failures and variance from other compilers.
This patch bumps the ABI, and adds the contexts them to the
substitution table. This is the intent of the ABI.
gcc/
* common.opt (-fabi-version=): Document 18.
* doc/invoke.texi (-fabi-version): Document 18.
gcc/c-family/
* c-opts.cc (c_common_post_options): Bump abi to 18.
gcc/cp/
* mangle.cc (write_prefix): Add VAR_DECL & FIELD_DECL to
substitution table under abi=18. Note possible mismatch.
gcc/testsuite/
* g++.dg/abi/lambda-ctx1-17.C: New.
* g++.dg/abi/lambda-ctx1-18.C: New.
* g++.dg/abi/lambda-ctx1-18vs17.C: New.
* g++.dg/abi/lambda-ctx1.h: New.
* g++.dg/abi/lambda-vis.C: Adjust expected mangles.
* g++.dg/abi/macro0.C: Adjust.
Diffstat (limited to 'gcc/common.opt')
| -rw-r--r-- | gcc/common.opt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/common.opt b/gcc/common.opt index 3a97e6782ce..bce3e514f65 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -1004,6 +1004,9 @@ Driver Undocumented ; member initializers in C++14 and up. ; Default in G++ 12. ; +; 18: Corrects errors in mangling of lambdas with additional context. +; Default in G++ 13. +; ; Additional positive integers will be assigned as new versions of ; the ABI become the default version of the ABI. fabi-version= |