Problem: no check if noexcept is supported by compiler

Solution: add compile check

CMakeLists.txt

@@ -415,6 +415,7 @@ if (CMAKE_SYSTEM_NAME MATCHES "SunOS" OR CMAKE_SYSTEM_NAME MATCHES "NetBSD")
   endif ()
 endif ()
 
+zmq_check_noexcept ()
 
 #-----------------------------------------------------------------------------
 if (NOT CMAKE_CROSSCOMPILING AND NOT MSVC)

builds/cmake/Modules/ZMQSourceRunChecks.cmake

@@ -293,3 +293,21 @@ int main (int argc, char *argv [])
 "
     ZMQ_HAVE_GETRANDOM)
 endmacro()
+
+macro(zmq_check_noexcept)
+  message(STATUS "Checking whether noexcept is supported")
+  check_cxx_source_compiles(
+"
+struct X 
+{
+    X(int i) noexcept {}
+};
+
+int main(int argc, char *argv [])
+{
+    X x(5);
+    return 0;
+}
+"
+    ZMQ_HAVE_NOEXCEPT)
+endmacro()

builds/cmake/platform.hpp.in

@@ -19,6 +19,8 @@
 #cmakedefine HAVE_MKDTEMP
 #cmakedefine ZMQ_HAVE_UIO
 
+#cmakedefine ZMQ_HAVE_NOEXCEPT
+
 #cmakedefine ZMQ_HAVE_EVENTFD
 #cmakedefine ZMQ_HAVE_EVENTFD_CLOEXEC
 #cmakedefine ZMQ_HAVE_IFADDRS