[gcc/devel/c++-contracts] c++: fix module attachment in contract tests

[gcc/devel/c++-contracts] c++: fix module attachment in contract tests

[Jason Merrill]

https://gcc.gnu.org/g:c436179eec24702efc27c9c19614192d3c6ad8a5

commit c436179eec24702efc27c9c19614192d3c6ad8a5
Author: Jason Merrill <jason@redhat.com>
Date:   Mon Oct 17 17:08:56 2022 -0400

    c++: fix module attachment in contract tests
    
    handle_contract_violation needs to be attached to the global module.
    
    gcc/testsuite/ChangeLog:
    
            * g++.dg/modules/contracts-1_a.C
            * g++.dg/modules/contracts-2_a.C
            * g++.dg/modules/contracts-3_a.C
            * g++.dg/modules/contracts-4_a.C: Add extern "C++".

Diff:
---
 gcc/testsuite/g++.dg/modules/contracts-1_a.C | 2 +-
 gcc/testsuite/g++.dg/modules/contracts-2_a.C | 2 +-
 gcc/testsuite/g++.dg/modules/contracts-3_a.C | 2 +-
 gcc/testsuite/g++.dg/modules/contracts-4_a.C | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/gcc/testsuite/g++.dg/modules/contracts-1_a.C b/gcc/testsuite/g++.dg/modules/contracts-1_a.C
index c1c2f6add93..17bd5603e0c 100644
--- a/gcc/testsuite/g++.dg/modules/contracts-1_a.C
+++ b/gcc/testsuite/g++.dg/modules/contracts-1_a.C
@@ -8,7 +8,7 @@ export module foo;
 // { dg-module-cmi foo }
 
 export int violation_count{0};
-export void handle_contract_violation(const std::contract_violation &violation)
+extern "C++" export void handle_contract_violation(const std::contract_violation &violation)
 {
   violation_count++;
   printf("violation_count: %d\n", violation_count);
diff --git a/gcc/testsuite/g++.dg/modules/contracts-2_a.C b/gcc/testsuite/g++.dg/modules/contracts-2_a.C
index cb9efd7ec07..59b7a8194df 100644
--- a/gcc/testsuite/g++.dg/modules/contracts-2_a.C
+++ b/gcc/testsuite/g++.dg/modules/contracts-2_a.C
@@ -12,7 +12,7 @@ export module foo;
 
 export int violation_count{0};
 export int violation_line_sum{0};
-export void handle_contract_violation(const std::contract_violation &violation)
+extern "C++" export void handle_contract_violation(const std::contract_violation &violation)
 {
   violation_count++;
   violation_line_sum += violation.line_number () * violation_count;
diff --git a/gcc/testsuite/g++.dg/modules/contracts-3_a.C b/gcc/testsuite/g++.dg/modules/contracts-3_a.C
index ab362a37851..24e709768ae 100644
--- a/gcc/testsuite/g++.dg/modules/contracts-3_a.C
+++ b/gcc/testsuite/g++.dg/modules/contracts-3_a.C
@@ -8,7 +8,7 @@ export module foo;
 // { dg-module-cmi foo }
 
 export int violation_count{0};
-export void handle_contract_violation(const std::contract_violation &violation)
+extern "C++" export void handle_contract_violation(const std::contract_violation &violation)
 {
   violation_count++;
   printf("violation_count: %d\n", violation_count);
diff --git a/gcc/testsuite/g++.dg/modules/contracts-4_a.C b/gcc/testsuite/g++.dg/modules/contracts-4_a.C
index ab6c8112f26..0fe6f02cb94 100644
--- a/gcc/testsuite/g++.dg/modules/contracts-4_a.C
+++ b/gcc/testsuite/g++.dg/modules/contracts-4_a.C
@@ -9,7 +9,7 @@ export module foo;
 // { dg-module-cmi foo }
 
 export int violation_count{0};
-export void handle_contract_violation(const std::contract_violation &violation)
+extern "C++" export void handle_contract_violation(const std::contract_violation &violation)
 {
   violation_count++;
   printf("violation_count: %d\n", violation_count);