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* [gcc r14-5826] c++: Allow exporting const-qualified namespace-scope variables [PR99232]
@ 2023-11-24 13:55 Nathaniel Shead
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From: Nathaniel Shead @ 2023-11-24 13:55 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:726723c476800285cfbdfce612cedde4a9a7ad58
commit r14-5826-g726723c476800285cfbdfce612cedde4a9a7ad58
Author: Nathaniel Shead <nathanieloshead@gmail.com>
Date: Wed Nov 15 20:50:53 2023 +1100
c++: Allow exporting const-qualified namespace-scope variables [PR99232]
By [basic.link] p3.2.1, a non-template non-volatile const-qualified
variable is not necessarily internal linkage in a module declaration,
and rather may have module linkage (or external linkage if it is
exported, see p4.8).
PR c++/99232
gcc/cp/ChangeLog:
* decl.cc (grokvardecl): Don't mark variables attached to
modules as internal.
gcc/testsuite/ChangeLog:
* g++.dg/modules/pr99232_a.C: New test.
* g++.dg/modules/pr99232_b.C: New test.
Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com>
Diff:
---
gcc/cp/decl.cc | 3 ++-
gcc/testsuite/g++.dg/modules/pr99232_a.C | 12 ++++++++++++
gcc/testsuite/g++.dg/modules/pr99232_b.C | 13 +++++++++++++
3 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/gcc/cp/decl.cc b/gcc/cp/decl.cc
index 16b04ebe0f8..ed1401591fa 100644
--- a/gcc/cp/decl.cc
+++ b/gcc/cp/decl.cc
@@ -11006,7 +11006,8 @@ grokvardecl (tree type,
&& (DECL_THIS_EXTERN (decl)
|| ! constp
|| volatilep
- || inlinep));
+ || inlinep
+ || module_attach_p ()));
TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
}
/* Not at top level, only `static' makes a static definition. */
diff --git a/gcc/testsuite/g++.dg/modules/pr99232_a.C b/gcc/testsuite/g++.dg/modules/pr99232_a.C
new file mode 100644
index 00000000000..097fb5e4403
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/pr99232_a.C
@@ -0,0 +1,12 @@
+// PR c++/99232
+// { dg-additional-options "-fmodules-ts" }
+// { dg-module-cmi pr99232 }
+
+export module pr99232;
+
+export const double lambda{ 1.3 };
+export constexpr int a = 42;
+
+export const double* get_lambda_addr() {
+ return λ
+}
diff --git a/gcc/testsuite/g++.dg/modules/pr99232_b.C b/gcc/testsuite/g++.dg/modules/pr99232_b.C
new file mode 100644
index 00000000000..a36a76fa5b7
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/pr99232_b.C
@@ -0,0 +1,13 @@
+// PR c++/99232
+// { dg-module-do run }
+// { dg-additional-options "-fmodules-ts" }
+
+import pr99232;
+
+double foo() { return lambda * 2.0; }
+static_assert(a == 42);
+
+int main() {
+ if (&lambda != get_lambda_addr())
+ __builtin_abort();
+}
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