Fix pybind11 visbility

Author: mphoward

src/ConstantFlow.h

@@ -17,13 +17,17 @@
 #define HOSTDEVICE
 #endif // __HIPCC__
 
+#ifndef PYBIND11_EXPORT
+#define PYBIND11_EXPORT __attribute__((visibility("default")))
+#endif
+
 namespace hoomd
     {
 namespace azplugins
     {
 
 //! Position-independent flow along a vector
-class ConstantFlow
+class PYBIND11_EXPORT ConstantFlow
     {
     public:
     //! Constructor
@@ -64,5 +68,6 @@ class ConstantFlow
     } // namespace hoomd
 
 #undef HOSTDEVICE
+#undef PYBIND11_EXPORT
 
 #endif // AZPLUGINS_CONSTANT_FLOW_H_

src/ParabolicFlow.h

@@ -22,6 +22,10 @@
 #define HOSTDEVICE
 #endif // __HIPCC__
 
+#ifndef PYBIND11_EXPORT
+#define PYBIND11_EXPORT __attribute__((visibility("default")))
+#endif
+
 namespace hoomd
     {
 namespace azplugins
@@ -44,7 +48,7 @@ namespace azplugins
  * \note The user must properly establish no flux of particles through the channel
  *       walls through an appropriate wall potential.
  */
-class ParabolicFlow
+class PYBIND11_EXPORT ParabolicFlow
     {
     public:
     //! Construct parabolic flow profile
@@ -95,6 +99,8 @@ class ParabolicFlow
 
     } // namespace azplugins
     } // namespace hoomd
+
 #undef HOSTDEVICE
+#undef PYBIND11_EXPORT
 
 #endif // AZPLUGINS_PARABOLIC_FLOW_H_

src/module.cc

@@ -3,6 +3,7 @@
 // Part of azplugins, released under the BSD 3-Clause License.
 
 #include <pybind11/pybind11.h>
+
 namespace hoomd
     {
 //! Plugins for soft matter
@@ -72,7 +73,6 @@ PYBIND11_MODULE(_azplugins, m)
     {
     using namespace hoomd::azplugins::detail;
 
-
     export_ConstantFlow(m);
     export_ParabolicFlow(m);