2 files changed, 7 insertions, 1 deletions
diff --git a/muse2/synti/fluidsynth/CMakeLists.txt b/muse2/synti/fluidsynth/CMakeLists.txt
index cdb298e2..0c3e1b97 100644
--- a/muse2/synti/fluidsynth/CMakeLists.txt
+++ b/muse2/synti/fluidsynth/CMakeLists.txt
@@ -38,7 +38,7 @@ add_library ( fluidsynth SHARED
 #
 set_target_properties ( fluidsynth 
    PROPERTIES PREFIX ""
-   COMPILE_FLAGS "-include ${PROJECT_BINARY_DIR}/all-pic.h"
+   COMPILE_FLAGS "-fvisibility=hidden -include ${PROJECT_BINARY_DIR}/all-pic.h"
    LINK_FLAGS "${FLUIDSYN_LDFLAGS}"   # "-lfluidsynth"
    )
 
diff --git a/muse2/synti/fluidsynth/fluidsynti.cpp b/muse2/synti/fluidsynth/fluidsynti.cpp
index bf27a61c..bf12b7f8 100644
--- a/muse2/synti/fluidsynth/fluidsynti.cpp
+++ b/muse2/synti/fluidsynth/fluidsynti.cpp
@@ -1310,6 +1310,12 @@ extern "C"
             MESS_MAJOR_VERSION, MESS_MINOR_VERSION,
             instantiate,
             };
+      // We must compile with -fvisibility=hidden to avoid namespace
+      // conflicts with global variables.
+      // Only visible symbol is "mess_descriptor".
+      // (TODO: all plugins should be compiled this way)
+  
+      __attribute__ ((visibility("default")))
       const MESS* mess_descriptor() { return &descriptor; }
       }