From 645080efe17d0ab008d7109252c2d2712c489f97 Mon Sep 17 00:00:00 2001
From: Arnaud Giersch <arnaud.giersch@univ-fcomte.fr>
Date: Tue, 6 Oct 2020 23:16:58 +0200
Subject: [PATCH] Black magic.

Aims to fix MC+smpi on FreeBSD with Clang.
---
 src/smpi/include/smpi_f2c.hpp | 2 +-
 src/smpi/mpi/smpi_f2c.cpp     | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/smpi/include/smpi_f2c.hpp b/src/smpi/include/smpi_f2c.hpp
index 5b8a55d373..7181c6b78f 100644
--- a/src/smpi/include/smpi_f2c.hpp
+++ b/src/smpi/include/smpi_f2c.hpp
@@ -36,7 +36,7 @@ class F2C {
     static char* get_key(char* key, int id);
     static void delete_lookup();
     static std::unordered_map<std::string, F2C*>* lookup();
-    F2C()          = default;
+    F2C();
     virtual ~F2C() = default;
 
     //Override these to handle specific values.
diff --git a/src/smpi/mpi/smpi_f2c.cpp b/src/smpi/mpi/smpi_f2c.cpp
index 787a182d5d..dafd94029b 100644
--- a/src/smpi/mpi/smpi_f2c.cpp
+++ b/src/smpi/mpi/smpi_f2c.cpp
@@ -20,6 +20,9 @@ namespace smpi{
 std::unordered_map<std::string, F2C*>* F2C::f2c_lookup_ = nullptr;
 int F2C::f2c_id_ = 0;
 
+// Keep it non trivially-constructible, or it will break MC+smpi on FreeBSD with Clang (don't ask why)
+F2C::F2C() = default;
+
 std::unordered_map<std::string, F2C*>* F2C::f2c_lookup()
 {
   return f2c_lookup_;
-- 
2.20.1