This follows up on some more test failures reported by Linaro on
aarch64. The testcase also depends on the libgcc/libstdc++ patch here:
https://gcc.gnu.org/pipermail/gcc-patches/2024-September/663749.html
To avoid an intermediary state where aarch64 regtests fail I could
include the module.cc changes in patch 6 of this series. Let me know if
you'd like me to send through a full updated v2 patch series instead of
having all these 'extra' patches fixing issues on other platforms...
Bootstrapped and regtested on x86_64-pc-linux and
aarch64-unknown-linux-gnu, OK for trunk?
-- >8 --
On some targets the gthreads support code uses weakref aliases on
entities marked 'static'. By the C++ standard these have internal
linkage, but we really shouldn't consider these as TU-local.
This provides enough of the puzzle to pass the testcase in the PR on at
least x86_64-linux and aarch64-linux; we'll see what happens on other
targets.
PR c++/115126
gcc/cp/ChangeLog:
* module.cc (depset::hash::is_tu_local_entity): Don't treat weak
entities as TU-local.
gcc/testsuite/ChangeLog:
* g++.dg/modules/xtreme-header-8.C: New test.
Signed-off-by: Nathaniel Shead <nathanielosh...@gmail.com>
---
gcc/cp/module.cc | 5 +++++
gcc/testsuite/g++.dg/modules/xtreme-header-8.C | 8 ++++++++
2 files changed, 13 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/modules/xtreme-header-8.C
diff --git a/gcc/cp/module.cc b/gcc/cp/module.cc
index d54f1c88366..3e9b63c1e56 100644
--- a/gcc/cp/module.cc
+++ b/gcc/cp/module.cc
@@ -13135,6 +13135,11 @@ depset::hash::is_tu_local_entity (tree decl, bool
explain/*=false*/)
linkage_kind kind = decl_linkage (decl);
if (kind == lk_internal)
{
+ /* But don't consider weak entities as TU-local. */
+ tree inner = STRIP_TEMPLATE (decl);
+ if (VAR_OR_FUNCTION_DECL_P (inner) && DECL_WEAK (inner))
+ return false;
+
if (explain)
inform (loc, "%qD declared with internal linkage", decl);
return true;
diff --git a/gcc/testsuite/g++.dg/modules/xtreme-header-8.C
b/gcc/testsuite/g++.dg/modules/xtreme-header-8.C
new file mode 100644
index 00000000000..9da4e01cc68
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/xtreme-header-8.C
@@ -0,0 +1,8 @@
+// PR c++/115126
+// { dg-additional-options "-fmodules-ts -Wignored-exposures" }
+// { dg-module-cmi xstd }
+
+export module xstd;
+extern "C++" {
+ #include "xtreme-header.h"
+}
--
2.46.0
